Macurco DVP-120 Manual DVP-120M

Macurco™ DVP-120M

Detection and Ventilation Control Panel
Operation Instructions

IMPORTANT: Keep these user instructions for reference.

Table of Contents

1 General Safety Information ............................................................................................................................................................... 6

1.1 List of warnings .................................................................................................................................................................. 6

2 Use Instructions and Limitations ....................................................................................................................................................... 7

2.1 DVP-120M General Description ......................................................................................................................................... 7

2.2 DVP-485 Modbus® Adapter ............................................................................................................................................... 7

2.3 MRS-485 Modbus Adapter ................................................................................................................................................ 7

2.4 Features ............................................................................................................................................................................. 8

2.5 Specifications ..................................................................................................................................................................... 8

3 Installation Instructions ...................................................................................................................................................................... 9

3.1 Location & Mounting ......................................................................................................................................................... 9

3.2 Installation ....................................................................................................................................................................... 10

3.2.1 General Wiring Information ........................................................................................................................................ 10

3.2.2 Power Connection ....................................................................................................................................................... 11

3.2.3 Remote Sensor Connection ........................................................................................................................................ 12

3.2.4 Relay Connection ........................................................................................................................................................ 15

3.2.5 Horn & Strobe Connection .......................................................................................................................................... 16

3.2.6 Interfacing Macurco Sensors ...................................................................................................................................... 16

3.2.7 DIP Switches and Addressing ...................................................................................................................................... 19

4 Operation .......................................................................................................................................................................................... 21

4.1 Power up ......................................................................................................................................................................... 21

4.2 Initial Operating Mode ..................................................................................................................................................... 21

4.2.1 Status Light Display ..................................................................................................................................................... 21

4.3 User Interface .................................................................................................................................................................. 22

4.3.1 Cursor Keys ................................................................................................................................................................. 22

4.3.2 MENU Key ................................................................................................................................................................... 22

4.3.3 Hush Key ..................................................................................................................................................................... 23

4.4 Normal Status Display ...................................................................................................................................................... 23

4.5 ALARM Status Display ...................................................................................................................................................... 24

4.6 Warning Status Display .................................................................................................................................................... 24

4.7 Trouble Status Display ..................................................................................................................................................... 25

4.8 Ventilation Control .......................................................................................................................................................... 26

4.8.1 Zone Signal Display ..................................................................................................................................................... 26

4.9 System Configuration ...................................................................................................................................................... 26

4.9.1 System Menu .............................................................................................................................................................. 27

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4.9.2

Configure System Submenu ........................................................................................................................................ 28

4.9.3 Configure Sensors Submenu ....................................................................................................................................... 35

4.9.4 Configure Relays, Horn & Strobe Submenu ................................................................................................................ 37

4.9.5 Configure Horn Submenu ........................................................................................................................................... 38

4.9.6 Configure Strobe Submenu ......................................................................................................................................... 38

4.9.7 Configure Zones Submenu .......................................................................................................................................... 39

4.9.8 Configure Signals Submenu ........................................................................................................................................ 43

5 Troubleshooting ............................................................................................................................................................................... 48

5.1 System Status Light .......................................................................................................................................................... 48

5.1.1 Input Channel Trouble ................................................................................................................................................ 48

5.1.2 Internal Controller board Trouble ............................................................................................................................... 49

5.2 Timed Ventilation Problem .............................................................................................................................................. 49

5.3 No Power ......................................................................................................................................................................... 49

5.4 LCD Display Unreadable ................................................................................................................................................... 49

5.5 Keypad does not respond ................................................................................................................................................ 50

5.5.1 LCD shows KEYS LOCKED ............................................................................................................................................. 50

5.5.2 After silencing Alarm, Warning or Trouble ................................................................................................................. 50

5.6 Power Failure ................................................................................................................................................................... 50

5.7 MRS-485 Modbus Application ......................................................................................................................................... 50

5.7.1 Normal Operation ....................................................................................................................................................... 50

5.7.2 Unknown Sensor Code ................................................................................................................................................ 50

5.7.3 Error Codes ................................................................................................................................................................. 50

5.7.4 Dip Switch Settings Codes ........................................................................................................................................... 51

6 Testing & Maintenance .................................................................................................................................................................... 52

6.1 Testing ............................................................................................................................................................................. 52

6.1.1 Keypad Test ................................................................................................................................................................. 52

6.1.2 Functionality Test ........................................................................................................................................................ 52

6.2 Maintenance.................................................................................................................................................................... 52

7 Appendix A – Table of Figures ......................................................................................................................................................... 53

8 Appendix B – Quick Setup ................................................................................................................................................................ 56

8.1 Configure System Submenu ............................................................................................................................................. 59

8.1.1 Set Time of Day ........................................................................................................................................................... 59

8.1.2 Set Day of Week .......................................................................................................................................................... 60

8.1.3 Load Default Configuration ......................................................................................................................................... 60

8.1.4 Change Password ........................................................................................................................................................ 60

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8.1.5

Enter Password............................................................................................................................................................ 60

8.2 Configure Sensors Submenu ............................................................................................................................................ 61

8.2.1 See section 4.2 Initial Operating Mode for more detail ............................................................................................... 61

8.2.2 See section 4.3 User Interface for more detail ............................................................................................................ 61

8.2.3 See section 4.13 System Configuration for more detail .............................................................................................. 61

8.2.4 See section 4.13.3 Configure Sensors Submenu for more detail ................................................................................. 61

8.3 Configure Relays, Horn & Strobe Submenu ..................................................................................................................... 62

8.3.1 See section 4.13.4 Configure Relays, Horn & Strobe Submenu for more detail .......................................................... 62

8.4 Configure Zones Submenu ............................................................................................................................................... 63

8.4.1 See section 4.13.7 Configure Zones Submenu for more detail .................................................................................... 63

8.5 Configure Signals Submenu ............................................................................................................................................. 65

8.5.1 See section 4.13.8 Configure Signals Submenu for more detail .................................................................................. 65

9 Appendix C – Replacement Parts ..................................................................................................................................................... 66

10 Appendix D – Setup Record ............................................................................................................................................................. 67

11 Appendix E – DVP-120 Quick Start Guide ....................................................................................................................................... 69

12 Macurco Gas Detection Product limited warranty ......................................................................................................................... 70

Technical Support Contact Information ........................................................................................................................................ 70

General Contact Information ........................................................................................................................................................ 70

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WARNING

Each person using this equipment must read and understand the information in this User manual

accordance with this user manual, may adversely affect product performance.

This equipment helps monitor for the presence and concentration level of certain specified

supervisor or User manual, or call Macurco Technical Service at 1-844-325-3050.

DVP-120M may not function effectively below 32°F (0°C) or above 120°F (49°C). Using the
equipment outside of this temperature range may adversely affect product.

High voltage terminals (120/240 VAC) are located within the DVP-120C, presenting a hazard to

internal circuits. Ensure power is removed from the DVP-120C prior to servicing the unit.

Immediately exit any environment that causes an alarm condition on the sensor.

Each time the unit is turned on it performs a self-test, which activates the audible and visual

Support at 1-844-325-3050.

Do not cover or obstruct audible alarm opening or visual alarm LED. Doing so may adversely
affect product performance.

Do not disassemble unit or attempt to repair or modify any component of this instrument. This

affect product performance and void product warranty.

Use only for monitoring the gases which the sensors and equipment are designed to detect.

325-3050.

Failure to follow instructions outlined in this user manual can result in sickness or death.

1 General Safety Information

1.1 List of warnings

before use. Use of this equipment by untrained or unqualified persons or use that is not in

airborne gases. Misuse may produce an inaccurate reading, which means that higher levels of
the gas being monitored may be present and could result in overexposure. For proper use, see

service technicians. Only qualified technicians should open the DVP-120C case and service the

alarms. If the self-test fails, or all the alarms do not activate, do not use and contact Technical

instrument contains no user serviceable parts, and substitution of components may adversely

Failure to do so may result in exposures to gases not detectable and result in serious injury or
death. For proper use, see supervisor or User manual, or Contact Technical Support at 1-844-

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WARNING

Each person using this equipment must read and understand the information in this User

not in accordance with this user manual, may adversely affect product performance.

2 Use Instructions and Limitations

2.1 DVP-120M General Description

The DVP-120M exhaust fan controller, in conjunction with Macurco™ gas detector, controller, transducers, provides automatic
controls to help maintain an acceptable environment in parking garages or other facilities. The DVP-120M system is designed to
meet specifications for safety in enclosed parking garages, including the Uniform Building Code and OSHA 50ppm CO
requirements. The standard DVP-120M can control up to twelve gas sensors via the 4-20 inputs on Channel 1 – Channel 12 as
well as up to 87 digital addressable sensors via Modbus inputs on the DVP-485. Sensors can be in any combination (i.e. CO, NO
EX, etc.). The DVP-120M is ready for operation after the wiring is complete and the user system configuration is entered.

2.2 DVP-485 Modbus® Adapter

The DVP-485 Modbus® adapter increases the capacity of the DVP-120 from 12 detectors to 99. The DVP-120M is the Modbus­Enabled version of the DVP-120 with up to 87 Modbus addressable sensors on three channels of 29 sensors per channel, plus
the original 12 analog 4-20mA sensor channels. System wiring includes 4-20mA current loop and RS-485 serial detector interface
as well as main power connection for the DVP-120M, the fan control and alarm connections from the DVP-120M to the building
ventilation and automation systems. The RS-485 serial interface is from the DVP-120M to the remote detectors. Power to these
detectors is provided by isolated/remote low voltage power supply. See section 2.4 Remote Sensor Connection for more
information regarding remote power supplies.

2.3 MRS-485 Modbus Adapter

The Macurco MRS-485 adapter is an accessory used to convert the 4-20mA analog signal from Macurco 6-Series type detectors
to a digital signal for use with the DVP-120M and other multipoint addressable systems. The Macurco MRS-485 simply plugs into
the back of the detector and a single screw fastens it in place. The MRS-485 accepts the 4-20mA output and is powered from
the same connection as the detector. The MRS-485 mounts to a Macurco 6-Series detector installed on a 4” x 4” electrical box
electrical box supplied by the contractor.

2

,

*Modbus is a trademark or registered trademark of Schneider Automation Inc.

manual before use. Use of this equipment by untrained or unqualified persons or use that is

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2.4 Features

• Externally visible LCD display showing the status of each transducer and relay

• External keypad for user selection of the transducer/alarm display and setting the configuration (password protected)

• Up to three ventilation control zones can be defined

• Each zone can be controlled based on transducer signals and/or time of day

• Each relay is configurable for delay before activation and minimum on time

• Fail safe operation can be implemented

• Lockable NEMA 1 type enclosure

• Modular input and output connectors

• Three RS-485 digital input channels

• Compatible with all Macurco 6-Series gas detectors and MRS-485 adapter

• Twelve analog (current loop) input channels

• Three 10A, 240 VAC SPDT fan/alarm relays

• Drivers for external Horn and Strobe

• ETL Listed to UL 2017

1

Where required by federal, state, local regulations, or the Authority Having Jurisdiction, DVP-120M is required to be used with
Listed Horn/Strobe model 78-2900-0211-X* to meet the 85dB(A) Audibility requirements of Standards UL 2017.
*Where “X” represents lens cover color, R for red lens cover, B for blue lens cover, O for amber lens cover, C for clear lens cover

1

(Type SM)

2.5 Specifications

• Size: 10.5” x 12.5” x 2.” (267 mm x 318 mm x 51 mm)

• Weight: 6 ½ lb (2.9 kg)

• Enclosure: NEMA 1 Type

• Operating Temperature: 32 to 120°F (0° to 49°C)

• Operating Humidity: 0% to 95% RH non-condensing

• Power Input: 90 – 250 VAC, 1 Amp, 47 – 63 Hz, single phase

• Relay Rating (3): SPDT, 120/240 VAC, 10 A resistive

• LCD Display: 2 rows of 16 characters with backlight

• Status Indicators (LED): Power, ALARM/warning, Hush, Relay 1, Relay 2 & Relay 3

• Audible indicator: Internal buzzer, 90 dBA at 1ft

• External Drivers (2): 24VDC, maximum 250 mA

• Carbon Monoxide (CO) Range: 0 – 200ppm

• Nitrogen Dioxide (NO

• Combustible (EX) Range: 0 – 50% LEL

• Ammonia (NH

3

• Hydrogen Sulfide (H

• Refrigerant (REF) Range: 0 – 1,000ppm

• Oxygen (O

) Range: 0 – 25% v/v

2

• Carbon Dioxide (CO

• Carbon Dioxide (CO

• Wild Card (WC) Range: Variable

• Relay on Delay: 0 – 15 minutes in 1 second increments

• Relay Minimum Run Time: 0 – 15 minutes in 1 second increments

) Range: 0 – 20ppm

2

) Range: 0 – 100ppm

S) Range: 0 – 50ppm

2

) Range: 0 – 5,000ppm

2

) Range: 0 – 5.00% vol

2

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WARNING

This equipment helps monitor for the presence and concentration level of certain specified

supervisor or User manual, or call Macurco Technical Service at 1-844-325-3050.

WARNING

DVP-120M may not function effectively below 32°F (0°C) or above 104°F (40°C). Using the
equipment outside of this temperature range may adversely affect product.

3 Installation Instructions

Gas detection and exhaust fan control is provided by a Macurco™ DVP-120M system. System wiring includes the main power
connection for the DVP-120M, 4-20mA current loop and 24VDC power connections between the remote sensors and the DVP­120M, the fan control connections and/or alarm connections from the DVP-120M to the building ventilation and automation
systems. The DVP-120M also includes the RS-485 serial interface from the DVP-120M to the MRS-485 and remote detectors.
Power to the MRS-485 and detectors is provided by isolated/remote low voltage power supply.

The system configuration is entered by the user through the LCD display and keypad. The system display provides the user with
the system status, and the status of each configured sensor. In addition, all control functions of the DVP-120M may be accessed
through the system display and keypad.

airborne gases. Misuse may produce an inaccurate reading, which means that higher levels of
the gas being monitored may be present and could result in overexposure. For proper use, see

This DVP-120M system should be used with Macurco™ transducers and each unit will measure the level of the target gas (i.e.
CO, NO
on low voltage (24VDC). Power is provided to the sensors via standard 2 wire where the Modbus communication uses a shielded
3-conductor wire with one twisted pair providing a pair for signal (A & B), common (COM) and shield ground (SHD) connections.
The DVP-120M control panel provides three relays which can be used for ventilation fan control or alarm signaling. These relays
(SPDT - Form C) are for pilot duty only, capable of switching 10 amp loads up to 240 VAC. Main power wiring should conform to
national and local electrical codes and may require separate inspections and certification. Contact your local building authority
for further details.

, EX, etc.) and provide this information to the DVP-120M over a Modbus communication loop. The transducers operate

2

3.1 Location & Mounting

Mounting holes are provided in the DVP-120M case at the four corners. The top two are keyhole shaped so that the panel can
be hung and then the two bottom screws driven to hold the panel. See figure 2-1. The panel should be mounted with sufficient
space all around for access to Conduit entry holes provided on the top, bottom and right side of the panel.

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WARNING

High voltage terminals (120/240 VAC) are located within the DVP-120M, presenting a hazard to

internal circuits. Ensure power is removed from the DVP-120M prior to servicing the unit.

Figure 3-1 Mounting Holes

Typical coverage for CO, CO
toxic gases (see the User Instructions of each sensor type for location and coverage details). Extra sensors may be needed near
areas where people work, such as toll booths. Macurco provides only the control panels and sensors. Fans, relays, and other
devices are provided by the contractor. See the appropriate building code for the size of fans and air changes per unit of time.

NOTE: For Typical coverage, please see Operation Manual for the Macurco sensor (CM-6, TX-6-ND, CD-6H, GD-6,…)

and NO2 sensors is 5,000 sq. ft. (464.5 sq. m), 900 sq. ft. (83.6 sq. m) for combustibles and other

2

3.2 Installation

3.2.1 General Wiring Information

service technicians. Only qualified technicians should open the DVP-120M case and service the

Figure 3-2 Typical Layout

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Signal

Connector

Pin Number

Line (120/220/240/250 VAC)

AC~

3

Neutral

AC~ 1 Ground

Ground Stud

n/a

With the exception of the safety ground, all field wiring is completed via fixed terminal connectors (provided). After wiring,
simply plug the modular connectors into the matching connectors on the printed circuit board (PCB).

Note: It is recommended to always install with wires enclosed within the rigid metallic conduit.

DVP-120M (Analog)

The power and signal connections to the remote mounted sensors should be size AWG18 (minimum) for short runs. Refer to
Table 3-2 for recommended wire gauges. Four conductor cables may be used in all cases since the DVP-120M employs DC
power for remote sensors to help prevent electrical noise from interfering with the sensor output signal.

Do not bundle sensor power and/or signal connections with other AC power cables to prevent electrical interference. If other
AC power connections must be bundled with the DVP-120M sensor cables, the sensor connections should be made with two
twisted pairs of the appropriate gauge, with an overall foil and braid shield. All shields should be terminated at the DVP-120M
end of the cable only. A ground stud is provided near the bottom left corner of the panel.

Note: For more detailed information on Analog connections please see Section 3.2.3 (Remote Sensor Connection) DVP-120M
(Analog) section.

DVP-120M (Digital)

The power connections to the MRS-485 and remote mounted sensors and should be size AWG18 (minimum) for short runs.
Refer to Table 2-2a for recommended wire gauges. The power for the MRS-485 adapter is connected via a two terminal screw
type connector, 12 to 24 VAC or 12 to 24 VDC and no polarity.

The MRS-485 adapter output is wired in the standard 2W-Modbus circuit definition with selectable built-in terminating resistors
at the ends of the RS-485 bus. It is recommended to always use twisted wires to reduce noise and allow for reliable data
communication over greater distances. For best performance use shielded 3-conductor wire with one twisted pair providing a
pair for signal (A & B), common (COM) and shield ground (SHD) connections. Use at least 3-conductor wire with one twisted pair
providing a pair for signal (A & B) and common (COM) connections. The Macurco MRS-485 Modbus output is connected via a
four terminal screw type connector.

Running the Modbus cable adjacent to or in the same conduit with high voltage wires is not recommended as there may be
interference from the high voltages.

3.2.2 Power Connection

The main power cable should be routed into the bottom left conduit entry. Macurco recommends a minimum wire size of
AWG18 and the wire insulator must be rated for 140
AWG. The safety ground wire should be secured to the ground stud at the bottom left of the cabinet with the lock washer and
nut supplied. Use a ring terminal for the ground connection. Refer to Table 2-1 for DVP-120M power connections. The line and
neutral wires should be stripped 1/4 in. (6.5 mm), insert the wire into the wire cavity of the fixed terminal connector. Ensure
that the wire cannot be easily pulled from the connector.

o

F (60oC) service. The modular connector will accept wire from 12 to 24

Table 3-1 Main Power Connections

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Figure 3-3 System Wiring Diagram

3.2.3 Remote Sensor Connection

DVP-120M (Analog)

Each remote sensor is connected by a four-wire connection – two wires for DC power and two wires for the 4 – 20 mA loop
connection. The sensors are connected to the control panel PCB with modular connectors, two sensors per connector. See
Figure 2-5 for a view of a typical sensor connector. Refer to Table 3-2 for wire size recommendations.

NOTE: If a CX-6 is connected to Analog Channel X of DVP-120M then address X is assigned to NO
to CO.

Figure 3-4 Analog Sensor Interface Connector

Each 8-terminal sensor modular connector may be disconnected from the PCB connector to ease wire installation. The terminals
will accept wire from 16 to 28 AWG. To install a wire, strip back approximately 0.25 in. (6 mm) of insulation and insert the bare
wire into the terminal. Tighten the screw clamp and ensure that the wire cannot be easily pulled from the connector. Connector
to sensor C1 through C12 correspondence to all 12 input channels.

and address “X+12” is assigned

2

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Wire gauge

Maximum Run Length

(feet)

(meters)

18

500

152

16

800

244

14

1250

381

Table 3-2 Recommended Wire Gauge

DVP-120M (Digital)

A Modbus over Serial Line Cable should be shielded for best performance. The shield should be connected on each detector at
SHD terminal and connected to a ground terminal or chassis only at one end of the bus. An RS485-MODBUS must use a
balanced pair (for A-B) and a third wire (for the Common). For RS485-MODBUS, Wire Gauge must be chosen sufficiently wide to
permit the maximum length (1000 m or 3281ft). AWG 24 is always sufficient for the MODBUS Data. Category 5 cables may
operate for RS485-MODBUS, to a maximum length of 600 m 1968.5 ft. For the balanced pairs used in an RS485-system, wire
with a characteristic impedance of higher than 100 Ohms may be preferred, especially for 19200 and higher baud rates.

Note: It is recommended to always use twisted wires to reduce noise and allow for reliable data communication over greater
distances. Use at least 3-conductor wire with one twisted pair providing a pair for signal (A & B) and common (COM)
connections.

For best performance use shielded 3-conductor wire with one twisted pair providing a pair for signal (A & B), common (COM)
and shield ground (SHD) connections.

Figure 3-6 Digital Sensor Interface Connector

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Figure 3-5 DVP-120M with DVP-485 Modbus Adapter

3.2.3.1 Topology

An RS485-MODBUS configuration without repeater has one trunk cable, along which devices are connected, directly (daisy
chaining) or by short derivation cables. The trunk cable, also named “Bus”, can be long. Its two ends must be connected on Line
Terminations. (see Line Termination - End of Line Resistor section). The use of repeaters between several RS485-MODBUS is also
possible.

3.2.3.2 Length

The end to end length of the trunk cable must be limited. The maximum length depends on the baud rate, the cable (Gauge,
Capacitance or Characteristic Impedance), the number of loads on the daisy chain, and the network configuration (2-wire). For a
maximum 9600 Baud Rate and AWG26 (or wider) gauge, the maximum length is 1000m 3281ft. The derivations must be short,
never more than 20m 65.5ft. If a multi-port tap is used with n derivations, each one must respect a maximum length of 40m
131ft divided by n.

3.2.3.3 Grounding

The Common circuit (COM) must be connected directly to protective ground, preferably at one point only for the entire bus.

3.2.3.4 Power Wire

All field wiring is completed via modular connectors (provided). After wiring, simply plug the modular connectors into the
matching connectors on the MRS-485. The power connections to the remote mounted detectors should be size AWG18
(minimum) for short runs. Since Macurco detectors are rated for operation between 12 and 24 VDC or VAC, the voltage drop
between the power supply and the MRS-485 should not be an issue if the recommended power wire gauge guidelines below are
followed. The terminals will accept wire from 16 to 28 AWG. To install a wire, strip back approximately 0.25 in. (6 mm) of

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Wire gauge

Maximum Run Length

(feet)

(meters)

18

263

80

16

418

127

14

665

203

12

1058

322

insulation and insert the bare wire into the terminal. Tighten the screw clamp and ensure that the wire cannot be easily pulled
from the connector.

Power Supply

Selection of a UL Listed NEC Class 2 power supply which can power MRS-485 connected to 6-Series detectors.

• MRS-485 is rated 3.25W with detector connected.

• E.g. If there are 12 detectors then the minimum power which the power supply needs to deliver is 12 detectors x 3.25

W/detector = 39W

So, a 24VDC, 60W power supply will work.

Table 3-3 Wire selection for 60W power supply

3.2.4 Relay Connection

All poles of the three relays are available at the modular connector R1 R2 R3 (see Figure 2- for details). R1 R2 R3 is a 9-position
variant of the high voltage modular connector used for power input. Each terminal can accommodate a wire size 12 to 24 AWG.

Figure 3-7 Relay Connector

To install the wiring for the relays, disconnect the connector from the header on the PCB. Strip the insulation of each wire back
approximately 1/4 in. (6.5 mm), insert the bare wire into the terminal and tighten the screw clamp. Ensure that the wire cannot
easily be pulled from the connector.

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Wire gauge

Maximum Run Length

(feet)

(meters)

24

200

61

22

340

103

20

480

147

18

850

215

WARNING

Immediately exit any environment that causes an alarm condition on the sensor.

3.2.5 Horn & Strobe Connection

The external horn and strobe connections are available at the modular connector S H (see Figure 2- for details). S H as a 4­position connector, similar to the sensor interface connectors.

Table 3-4 Wire gauge for Horn & Strobe functions

3.2.6 Interfacing Macurco Sensors

3.2.6.1 Analog channels

Macurco sensors with current loop outputs may be used with the DVP-120M. Visit www.macurco.com for information on
compatible Macurco gas transducers. See specific information on other manufacturer’s transducers.

Power connections to Macurco sensors used with the DVP-120M are polarity-insensitive (no polarity), since a bridge rectifier is
connected to the power input terminals. All sensors used with the DVP-120M panel employ screw clamp terminal blocks for
power and signal connections. Polarity of the current loop connections is marked on the printed circuit board of the sensor.

3.2.6.2 Digital Channels

The Macurco MRS-485 Adapter converts the Macurco 6-Series 4-20mA analog output to a digital output for use with the DVP­120M and other addressable network systems.

1. Remove the 4-20mA/Power plug from the Macurco 6-Serires gas detector

2. Plug the MRS-485 adapter into the empty socket.

3. Install the provided MRS-485 screw.

4. See the wiring diagram for wire connection.

Figure 3-8 MRS-485 Installation

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3.2.6.3 Connection

The Macurco MRS-485 output is connected via a four terminal screw type connector. The MRS-485 adapter is wired in the
standard 2W-Modbus circuit definition with selectable built-in terminating resistors at the ends of the RS-485 bus. The power
for the MRS-485 adapter is connected via a two terminal screw type connector, 12 to 24 VAC or 12 to 24 VDC and no polarity.

Note: Running the Modbus cable adjacent to or in the same conduit with high voltage wires is not recommended as there may
be interference from the high voltages.

Figure 3-9 Modbus wiring diagram

3.2.6.4 Line Termination – End of Line Resistor

The MRS-485 and DVP-485 adapters are wired in the standard 2W-Modbus circuit definition with selectable built-in terminating
resistors at the ends of the RS-485 bus. The MRS-485 and DVP-485 adapters provide integral termination for end of line resistors

(EOL). The terminations use 4-pin connector with jumper to select termination: The user selects no termination or one of the
two Modbus line termination options. The MRS-485 and DVP-485 adapters have two-line termination options provided onboard
that should cover most situations.

Figure 3-10 EOL Placement

Place the EOL jumper on one of the following positions:

• N = No termination (default)

• 2 = 120 ohm

• 1 = 100 ohm

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Determining EOL Use

At the baud rate of 19200 (default baud rate for Macurco MRS-485 and DVP-485) and with cables less than 1,000 ft. in length,
termination resistors are not recommended.

At the baud rate of 19200 and with cables longer than 1,000 ft., termination resistors are recommended.

The value of termination resistors is chosen based on the type of cable used.

• If a RS-485 type of cable is used, then use 120 ohms for the termination resistors.

• If a Cat 5 type of cable is used, then use 100 ohms for the termination resistors.

An RS-485 network requires a 3-wire cable: a twisted pair and a third wire. It is difficult to tell whether shielding is required or
not in a particular system until problems arise, so it is recommended to always use shielded cable.

If a Cat 5 type of cable is used, then use 100 ohms for the termination resistors. Be aware that the most common cable is Cat 5e­UTP (unshielded twisted pair) which may work over shorter distances and in less demanding applications with low EMI noise
level (because it is unshielded). Make sure to use a pair for data lines and a third or a pair twisted together for the common
connection.

When using termination resistors use only 2 resistors, one at each end of the RS-485 transmission line (i.e. 1 at the DVP-485 and
1 at the last/farthest MRS-485). Because DVP-485 uses three RS-485 transceiver channels, 2 termination resistors are used for
each RS-485 channel of the network.

Using Other Baud Rates

For any other baud rates calculate when (at what length) termination resistors are required. Calculate the length as 1000 ft.
divided by the ratio between the new baud rate and 19200.



( 19200 ⁄)

For example, if new baud rate is 9600

1000 

(9600  19200 ⁄)

1000 

=

0.5

= 2000 

Use termination resistors when cables are longer than 2000 ft.

For example, if new baud rate is 38400

1000 

(38400  19200 ⁄)

1000 

=

2

= 500 

Use termination resistors when cables are longer than 500 ft.

Note: Other manufactures may have different recommendations on wire length and EOL resistor usage.

REV – 2.2.1 [34-8708-4770-6 ] 18 | Page

Figure 3-11 EOL Placement Less than 1000ft

At 19200 baud rate (default), 1000 ft or less and using RS-485 or Cat-5 type cable

Figure 3-12 EOL Placement greater than 1000ft

At 19200 baud rate (default), more than 1000 ft and using RS-485 type cable

3.2.7 DIP Switches and Addressing

Each MRS-485 (and the partner gas detector) must be configured to a unique address. If there are 10 detectors on the serial
line, then 10 unique addresses must be used, one for each detector. To set the address, use the eight DIP switch positions. For
each unit choose the value from 13 to 99 (see chart) and set the eight switches to match the address. UP means ON or 1 and
DOWN means OFF or 0. For example, to configure a unit as address “50”, set switches “2, 5, 6” (see table) to ON or in the up
position (01001100). See page 11 for a list of applicable addresses and dip-switch settings.

Figure 3-13 MRS-485 DIP switch (address “50” shown)

Note: Address 1 – 12 are reserved for the twelve analog channels (C1-C12) on the DVP-120M board. Modbus adapters should
be addressed 13 – 99.

REV – 2.2.1 [34-8708-4770-6 ] 19 | Page

1 = 1

21 = 1, 3, 5

41 = 1, 4, 6

61 = 1, 3, 4, 5, 6

81 = 1, 5, 7

2 = 2

22 = 2, 3, 5

42 = 2, 4, 6

62 = 2, 3, 4, 5, 6

82 = 2, 5, 7

3 = 1,2

23 = 1, 2, 3, 5

43 = 1, 2, 4, 6

63 = 1, 2, 3, 4, 5, 6

83 = 1, 2, 5, 7

4 = 3

24 = 4, 5

44 = 3, 4, 6

64 = 7

84 = 3, 5, 7

5 = 1,3

25 = 1, 4, 5

45 = 1, 3, 4, 6

65 = 1, 7

85 = 1, 3, 5, 7

6 = 2,3

26 = 2, 4, 5

46 = 2, 3, 4, 6

66 = 2, 7

86 = 2, 3, 5, 7

7 = 1,2,3

27 = 1, 2, 4, 5

47 = 1, 2, 3, 4, 6

67 = 1, 2, 7

87 = 1, 2, 3, 5, 7

8 = 4

28 = 3, 4, 5

48 = 5, 6

68 = 3, 7

88 = 4, 5, 7

9 = 1,4

29 = 1, 3, 4, 5

49 = 1, 5, 6

69 = 1, 3, 7

89 = 1, 4, 5, 7

10 = 2,4

30 = 2, 3, 4, 5

50 = 2, 5, 6

70 = 2, 3, 7

90 = 2, 4, 5, 7

11 = 1,2,4

31 = 1, 2, 3, 4, 5

51 = 1, 2, 5, 6

71 = 1, 2, 3, 7

91 = 1, 2, 4, 5, 7

12 = 3,4

32 = 6

52 = 3, 5, 6

72 = 4, 7

92 = 3, 4, 5, 7

13 = 1, 3,4

33 = 1, 6

53 = 1, 3, 5, 6

73 = 1, 4, 7

93 = 1, 3, 4, 5, 7

14 = 2, 3, 4

34 = 2, 6

54 = 2, 3, 5, 6

74 = 2, 4, 7

94 = 2, 3, 4, 5, 7

15 = 1, 2, 3, 4

35 = 1, 2, 6

55 = 1, 2, 3, 5, 6

75 = 1, 2, 4, 7

95 = 1, 2, 3, 4, 5, 7

16 = 5

36 = 3, 6

56 = 4, 5, 6

76 = 3, 4, 7

96 = 6, 7

17 = 1, 5

37 = 1, 3, 6

57 = 1, 4, 5, 6

77 = 1, 3, 4, 7

97 = 1, 6, 7

18 = 2, 5

38 = 2, 3, 6

58 = 2, 4, 5, 6

78 = 2, 3, 4, 7

98 = 2, 6, 7

19 = 1, 2, 5

39 = 1, 2, 3, 6

59 = 1, 2, 4, 5, 6

79 = 1, 2, 3, 4, 7

99 = 1, 2, 6, 7

20 = 3, 5

40 = 4, 6

60 = 3, 4, 5, 6

80 = 5, 7

NOTE: If a CX-6 is connected to Analog Channel X of DVP-120M then address X is assigned to NO

and address “X+12” is assigned

2

to CO. If CX-6 is assigned Modbus address X and connected to digital channel of DVP-120M, then address X is assigned to NO
Sensor and address X+1 is assigned to CO Sensor.

Table 3-5 DIP switch settings

2

3.2.7.1 Normal MRS-485 Operation

The MRS-485 will monitor the 4-20 mA current output of the detector. At power up and during its warm-up period, the 6-Series
detector will communicate its sensor type over the 4-20 current output using a custom protocol. The MRS-485 will automatically
register each 6-Series detector as it is programmed with information about all the detectors to which it can be connected. The
MRS-485 will use this information to determine the gas level sensed by the 6-Series detector by measuring the 4-20 mA current­loop output during normal operation of the detector.

• When the LED is solid GREEN, the operation is normal, the MRS-485 knows the detector type, no errors are detected,
and no MODBUS data are being received or transmitted over the RS-485 line.

• When the LED is GREEN with random bursts of AMBER, the operation is normal and now data are being received or
transmitted over the RS-485 line. The AMBER LED will come on anytime that there is data traffic

NOTE: After complete system installation, verify all sensors (verify sensor address and sensor type) connected to the panel are
detected by the panel and there is not any trouble indication for any of the connected detector. Refer to Section 4.9.3 to scroll
through all sensors detected by the panel.

REV – 2.2.1 [34-8708-4770-6 ] 20 | Page

DVPM- 120M Ver 3.00.D

WARNING

Each time the unit is turned on it performs a self-test, which activates the audible and visual

Support at 1-844-325-3050.

DVP- 120M Ver 3.00.D

Warm- up 2:30

4 Operation

4.1 Power up

When power is first applied to the DVP-120M, a few simple self-tests will be performed, and the system will cycle through all
status lights, and display the system name and model # (Figure 3-1). The system will then proceed to normal mode, if the
operating parameters have been entered.

Figure 4-1 Model Display

alarms. If the self-test fails, or all the alarms do not activate, do not use and contact Technical

4.2 Initial Operating Mode

If the user has not entered any parameters, the system WILL NOT be controlling the ventilation system. The relays WILL NOT
actuate, and the horn and strobe outputs WILL NOT be powered. The power status light will show NORMAL (steady green) and
the system will immediately enter the CONFIGURATION mode, see section 3.2 for details to set the configuration parameters.

If a valid set of configuration parameters have been entered, the panel will wait for all sensors to warm up. During this time, the
display will show a count-down, minutes and seconds, until the end of the warm-up period, (Figure 3-2).

Figure 4-2 Warm-Up display

During the warm-up period, the keypad will be locked. When the warm-up period ends, the LCD will start showing the normal
display.

4.2.1 Status Light Display

The POWER, ALARM/WARNING, SILENCE, RELAY 1, RELAY 2 and RELAY 3 status lights indicate the system status and provide the
following data:

• POWER

o Green (steady) Power is good and there are no trouble indications
o Yellow (steady) Trouble is indicated by a transducer or the panel itself

• ALARM/WARNING

o Off All indicated gas levels are below the warning level
o Red (steady) One or more gas levels is at or above the alarm level
o Amber (steady) One or more gas levels is at or above the warning level

• HUSH

o Off There are no silenced alarms or warnings

REV – 2.2.1 [34-8708-4770-6 ] 21 | Page

o Red (flashing) There are alarms, warnings and/or troubles that have been silenced (gas levels may

or may not remain or continue to be at alarm or warning levels)

• RELAY 1

o Off Relay 1 is not on
o Green (steady) Relay 1 is on

• RELAY 2

o Off Relay 2 is not on
o Green (steady) Relay 2 is on

• RELAY 3

o Off Relay 3 is not on
o Green (steady) Relay 3 is on

The overall system status is visible at a distance via the status lights as described above. More detailed system information is
displayed on the LCD, which can show the status of each relay and sensor. A typical status display is shown in Figure 3-4.

4.3 User Interface

The LCD display is used to show detailed information about the status of the control system and the configuration parameters
to the user. The keypad is used to select the information displayed and to enter the configuration parameters, which are stored
in the DVP-120M memory. The keypad consists of the usual ten-digit keys, four direction keys, plus a MENU key that is used to
access the configuration menu and a HUSH key that will silence the audible alarm indicators. In normal mode, holding the zero
key for three (3) seconds can be used to lock the keypad against accidental (or unauthorized) use. See Section 4.5 for details.

Figure 4-3 Keypad layout

4.3.1 Cursor Keys

In normal mode, (no warnings or alarms indicated), the up and down cursor keys will scroll the display to any configured
sensors’ status. In normal mode, the left and right cursor keys will scroll through the status of each of the relays. When the left
(or right) key is used to scroll to another relay, the display will remove the underlining under the sensor number and underline
the relay number; this indicates that the digit keys can be used to jump directly to a particular relay’s status. When the up or
down key is again used the display will switch back to the digit keys jumping to a particular sensor.

4.3.2 MENU Key

The MENU key has three functions. First, when the system is presenting the normal display, pressing the MENU key will cause
the system to shift to the Configuration Menu. The second function of the MENU key is to return to the next-higher menu level,
e.g. from the sensor configuration menu to the system menu, or from the system menu out to normal mode. If in the middle of

REV – 2.2.1 [34-8708-4770-6 ] 22 | Page

MON 10:23 R1 OFF

S 01 CO 5 PPM

Show Sensor _1

entering a multi-digit parameter, the MENU key also cancels any changes to the parameter. When the MENU key is used to
return to normal mode, any changed configuration parameters are saved in the DVP-120’s memory. The third function of the
MENU key is to change the LCD contrast by holding the MENU key for five (5) seconds, at which point the LCD will prompt for
further activities, see sections 4.4 for more detail.

4.3.3 Hush Key

The HUSH key is only used to silence the audible indicators (internal buzzer and possible external Horn and Strobe devices).
Pressing and releasing the button will silence the internal buzzer. The HUSH button must be held for 3 seconds to silence the
Horn and Strobe devices.

4.4 Normal Status Display

Figure 4-4 Normal System Display

The display shows the day of the week and the time of day, in 24-hour format. It also shows the status of one of the relays, R1 in
this example, and the type and indicated gas concentration of one of the configured sensors, S01 is a CO sensor indicating 5ppm
in this example.

Notice in Figure 3-4 that the digits 0 1 are underlined; this indicates that the digit keys can be used to jump directly to another
sensor’s status. When the first digit is pressed, the display will prompt for the second digit of the target sensor.

Figure 4-5 Sensor Prompt

In this example, the first digit entered was 1. Since the DVP-120 can handle 12 sensors, the first digit for a sensor number is
either 0 or 1. The leading zero must be entered when selecting a sensor less than ten. When the second digit is entered, the
normal display will be restored; showing the type and value for the selected sensor.

As mentioned above, the left and right scroll keys will display the next or previous relay’s status. The display will also change the
underline to indicate that the digit keys (zero, one and two) can be used to jump directly to a particular relay. Since only one
digit is needed to select a relay, the system does it immediately rather than prompting to show the relay.

If the sensor is indicating a gas level that is greater than the alarm or warning levels, the gas reading will alternate with the
words ALARM or WARNING as appropriate. If a sensor fails, a connection is lost or the panel itself detects a failure of its own,
the panel will enter TROUBLE mode and the gas reading will be replaced by the word TROUBLE (the TROUBLE status condition is
discussed in section 3.1.6 below).

REV – 2.2.1 [34-8708-4770-6 ] 23 | Page

ALARM

CO SENSOR 02

WARNING

Do not cover or obstruct audible alarm opening or visual alarm LED. Doing so may adversely
affect product performance.

ALARM SILENCED

FOR 5 MINUTES

4.5 ALARM Status Display

When any sensor indicates a gas level that is at or above the configured alarm level for the sensor, the panel will enter ALARM
mode, during which the internal buzzer will sound, the alarm lamp will be red and the LCD will show the sensor type and
channel number.

Figure 4-6 Alarm Display

The display will cycle through all sensors that are signaling alarm levels, at five seconds per display. Pressing any key (except
HUSH) will advance the display to the next sensor that is signaling an alarm level.

If an external horn and/or strobe are connected and configured to signal an alarm condition, they will also sound when an alarm
condition occurs, after a delay if that configuration option is used.

When the HUSH key is pressed, the internal buzzer will be silenced for five (5) minutes. If the horn or strobe turn on delays have
not finished, then they will also be silenced. If the delays have finished the HUSH key must be held for three (3) seconds in order
to silence the horn and strobe.

When all indicators have been silenced, the display will show that alarms have been silenced for five minutes. After any key is
pressed (or five seconds), the display will return to normal mode.

Figure 4-7 Alarm Silenced message

If Relay 1 is configured as an ALARM relay, it will be turned on when an alarm condition is recognized and will be turned off
when all audio indicators have been silenced using the HUSH key.

4.6 Warning Status Display

When any sensor indicates a gas level that is at or above the configured warning level for the sensor, the panel will enter
WARNING mode during which the internal buzzer will sound, the alarm/warning lamp will be amber and the LCD will show the
sensor type and channel number.

REV – 2.2.1 [34-8708-4770-6 ] 24 | Page

WARNING

CO SENSOR 02

WARNING SILENCED

FOR 15 MINUTES

Trouble

CO Sensor 02

Figure 4-8 Warning Display

The display will cycle through all sensors that are signaling warning levels, at five seconds per display. Pressing any key (except
HUSH) will advance the display to the next sensor that is signaling a warning level.

If the buzzer and/or an external horn and/or external strobe are connected and configured to signal a warning condition, they
will also sound when a warning condition occurs. There is a configurable delay before the horn or strobe will sound, see sections

4.9.5.2 and 4.9.6.2.

When the HUSH key is pressed, the internal buzzer will be silenced for fifteen (15) minutes. If the horn or strobe turn on delays
have not finished, then they will also be silenced. If the delays have finished, the HUSH key must be held for three (3) seconds in
order to silence the horn and strobe.

When all indicators have been silenced, the display will show that warnings have been silenced for fifteen minutes. After any
key is pressed (or five seconds) the display will return to normal mode.

Figure 4-9 Warning Silenced Message

4.7 Trouble Status Display

If a sensor fails, a connection is lost or the panel itself detects a failure of its own, the panel will enter TROUBLE mode during
which the internal buzzer will sound, the power lamp will be yellow and the LCD will display the specific sensor identified.

Possible trouble conditions are:

• Any configured channel has less than 4 mA flowing in the current loop

• A sensor is reporting a trouble condition

• Any configured channel wiring is open.

• Internal controller board problems are detected.

Figure 4-10 Trouble Display

The display will cycle through all trouble indications, at five seconds per display. Pressing any key (except HUSH) will advance
the display to the next trouble indicator.

If an external horn and/or strobe are connected and configured to signal a trouble condition, they will also sound when a
trouble condition occurs, after a delay, if that configuration option is selected.

When the HUSH key is pressed, the internal buzzer will be silenced for eight (8) hours. If the horn or strobe turn on delays have
not finished, then they will also be silenced. If the delays have finished, the HUSH key must be held for three (3) seconds in
order to silence the horn and strobe.
REV – 2.2.1 [34-8708-4770-6 ] 25 | Page

TROUBLE SILENCED

FOR 8 HOURS

ZONE SIGNAL

ZONE 1

ZONE SILENCED

FOR 15 MINUTES

When all indicators have been silenced, the display will show that trouble indications have been silenced for eight hours. After
any key is pressed (or five seconds), the display will return to normal mode.

Figure 4-11 Trouble Silenced message

4.8 Ventilation Control

The ventilation control function operates independently from the alarm function. It provides the ability to configure the DVP­120M for control of one to three zones. Each zone can respond to gas levels indicated by one or more of the sensors, with
configurable turn on and turn off concentrations (rising and falling) for each gas type. Each zone can also be controlled based on
the time of day.

Each zone can be configured to control one, two or all three of the relays and the external horn and strobe if desired. When
more than one zone is controlling a relay it only takes one zone to activate the relay, but all controlling zones must release the
relay before it will turn off.

Each of the relays, horn and strobe has independent turn on delays (to ignore short duration, transient gas signals) and turn off
delays (to ensure minimum run times for fans that must run for internal cooling).

4.8.1 Zone Signal Display

When a zone is controlling the horn or strobe and they are activated, the panel will enter ZONE SIGNAL mode during which the
horn and/or strobe will be turned on and the LCD will show the zone that is signaling.

Figure 4-12 Zone signal Display

The display will cycle through all zones that are controlling the horn or strobe and are signaling, at five seconds per display.
Pressing any key (except HUSH) will advance the display to the next zone that is signaling.

When the HUSH key is held for three (3) seconds, the horn and/or strobe will be silenced for fifteen (15) minutes. When
silenced, the display will show that zone signals have been silenced for fifteen minutes. After any key is pressed (or five seconds)
the display will return to normal mode.

Figure 4-13 Zone Signal Silenced Message

4.9 System Configuration

The configuration menus can be entered from normal mode by pressing the MENU key. While in configuration mode, the user
can review all configuration parameters to check the current operating conditions. As an aid when configuring the control panel,
the first entry in the top menu summarizes the number of sensors and relays that the panel is currently recognizing. Be sure that
the 4-20mA output on each sensor is set to “On”.

REV – 2.2.1 [34-8708-4770-6 ] 26 | Page

5 SENSORS FOUND

3 RELAYS FOUND

Save Config.?

(0=NO, 1=YES)

Figure 4-14 Hardware Summary

The MENU key is also used to return to a higher-level menu and finally exit the configuration menus back to normal mode.
When exiting from the menu system to normal mode, if any configuration changes have been made, the panel will ask whether
changes are to be saved.

Figure 4-15 Save Configuration Prompt

Pressing the zero (0) key at this point will cancel all changes except time and day of week. Pressing the one (1) will save all
changes to memory, and the changes will then become effective in controlling the ventilation system.

While the DVP-120M is in the configuration mode, alarm and ventilation control functions continue in the background with the
previously set configuration values. In particular, if an alarm condition is detected, the alarm lamp, the buzzer, the horn and the
strobe will operate as configured but the LCD will not display the detailed information. The HUSH key can be used to silence any
alarm, warning or trouble indicators without having to exit the configuration mode. If the MENU key is used to exit the
configuration mode before using the HUSH key, the LCD will display the cause of the audible indicator.

The numeric keys are used to change the particular parameter displayed. The underlined character, or space, on each display
indicates what will be changed by the digit keys.

The left and right cursor keys will enter the particular submenu and scroll through the items of the same type where
appropriate, e.g. enter the Configure Sensors submenu and scroll through the parameter lists for the existing sensors.

The up cursor key scrolls through the menu entries in the order listed here, while the down cursor key scrolls in the reverse
order. Changing the configuration parameters requires the entry of a password before changes can be made. The default
password is 1234. See Figure 4-40 Enter Password for an example of the password prompt.

In many cases the parameter is entered as a string of digits, but some parameters are selected by pressing a single key, e.g.
pressing 1 selects Monday, 2 selects Tuesday, etc.

4.9.1 System Menu

The top menu level allows the user to select:

• Configure System

• Configure Sensors

• Configure Relays, Horn & Strobe

• Configure Zones

• Configure Signals

The up and down cursor keys can be used to scroll through the entries in the list, while the left or right key will enter the
particular submenu.

The MENU key will return to normal mode. If any configuration parameters have been changed, the panel will prompt to save
the changes. If the changes are saved, this is the point at which they become effective in controlling the ventilation system and

REV – 2.2.1 [34-8708-4770-6 ] 27 | Page

Time: 22: 55

Day: Tuesday

Time: 01:55

Day: Tuesday

Time: 16:55

Day: Tuesday

for alarm level detection. Note that changes to the time and day of week are not considered configuration items; they are saved
as soon as they are entered.

4.9.2 Configure System Submenu

The system configuration submenu provides entries to:

• Set the time of day, 24-hour format

• Set the day of the week, day 1 is Monday

• Load Default Configuration

• Change Password

• Configure Modbus

• Configure Sensor Type

• Enter Password

4.9.2.1 Set Time of Day

Figure 4-16 Set Time of Day

This display example shows that the time is 22:55 (10:55 PM). The underlined characters indicate that the numeric keys can be
used to set the current time of day. When the first digit is entered (and after the password is entered if required), the display
will change to show that the “hour” portion of the time is currently being entered.

Figure 4-17 Enter Hours

In this example, the first digit entered was 1 (one), and the panel is waiting for the second digit of the hour to be entered. If the
second digit is not entered within five seconds, the time will revert to the previous value. After the second digit of the hour is
entered, the display will prompt for the “minute” entry:

Figure 4-18 Enter Minutes

In this example, the hour (16) has been accepted and the panel is waiting for the minute to be entered. If no digits are entered
within 5 seconds, the entry will be finished without changing the minute; however, the hour will be changed to the value
entered.

Note that the time is saved as soon as the fourth digit is entered.

REV – 2.2.1 [34-8708-4770-6 ] 28 | Page

Time: 22:55

Day: 2 Tuesday

1 Load Default

Configuration

4.9.2.2 Set Day of Week

Figure 4-19 Set Day of the week

This display example shows that Tuesday is the current day of the week. The underline character indicates that the day can be
changed by entering the corresponding digit:

• 1 Monday

• 2 Tuesday

• 3 Wednesday

• 4 Thursday

• 5 Friday

• 6 Saturday

• 7 Sunday

Note that the day of the week is saved as soon as the digit is entered.

4.9.2.3 Load Default Configuration

Figure 4-20 Load Default Configuration

When the number one (1) digit is pressed, the panel will prompt for the password, even if it has been entered previously. If the
password is entered correctly, the panel will overwrite the existing configuration with the default configuration. This operation
is intended to restore the panel to a known basic condition if it is removed from one installation and installed in another.

The default configuration is:

• Password 1234

• Sensors Undefined

• Alarm signals Buzzer = Intermittent, Horn = Intermittent, Strobe = Continuous

• Warning signals Buzzer = Off, Horn = Off, Strobe = Off

• Trouble signals Buzzer = Triple Tap, Horn = Off, Strobe = Off

• Relay 1 Normally off, 1-minute turn on delay, 1 minute minimum on time

• Relay 2 Normally off, 1-minute turn on delay, 1 minute minimum on time

• Relay 3 Normally off, 1-minute turn on delay, 1 minute minimum on time

• Horn Normally off, 1-minute turn on delay, 0 (zero) minimum on time

• Strobe Normally off, 1-minute turn on delay, 0 (zero) minimum on time

• Zone 1 Controls R1

• Zone 2 Controls R2

• Zone 3 Controls R3

• Group 1 in each zone Type 1 CO, Voting mode, Quorum = 1

• Group 2 in each zone Type 2 NO

• Group 3 in each zone Type 3 EX, Voting mode, Quorum = 1

, Voting mode, Quorum = 1

2

REV – 2.2.1 [34-8708-4770-6 ] 29 | Page

Description

Carbon

Nitrogen

Combustible

Ammonia

Hydrogen

Refrigerants

Carbon

Oxygen

Carbon

Type

CO

NO2

EX

NH3

H2S

REF

CO2

O2

CO2

Range

200 ppm

20 ppm

50% LEL

100 ppm

50 ppm

1,000 ppm

5,000 ppm

25% v/v

5.00 % vol

Alarm Level

200 ppm

5 ppm

20% LEL

75 ppm

20 ppm

300 ppm

4,000 ppm

19.5% v/v

0.50 % vol

Warning
Level

100 ppm

3 ppm

15% LEL

50 ppm

14 ppm

200 ppm

1,500 ppm

20.0% v/v

0.15% vol

Rising Level

35 ppm

2.5 ppm

10% LEL

25 ppm

8 ppm

100 ppm

1,000 ppm

20.3% v/v

0.10% vol

Falling Level

15 ppm

1.2 ppm

5% LEL

10 ppm

3 ppm

50 ppm

800 ppm

20.6% v/v

0.08% vol

Change Password

* * * *

B a u d R a t e: 0 - 1 9 2 0 0 B d

I

n

t e r

-- f r a m e a d d d e l a

y: 0 1 m s e c

• Group 4 in each zone Type 4 NH

• Group 5 in each zone Type 5 H

, Voting mode, Quorum = 1

3

S, Voting mode, Quorum = 1

2

• Group 6 in each zone Type 6 REF, Voting mode, Quorum = 1

• Group 7 in each zone Currently unused

• Group 8 in each zone Type 8 O

• Group 9 in each zone Type 9 CO

• Group 10 in each zone Type 10 CO

Monoxide

Dioxide

Gas

, Voting mode, Quorum = 1

2

, Voting mode, Quorum = 1

2

, Voting mode, Quorum = 1

2

Sulfide

Table 4-1 Default settings

4.9.2.4 Change Password

Dioxide (CD­6H, CD-6MC)

Dioxide
(CD-6G)

Figure 4-21 Change Password

When the first digit is entered to change the password, the panel will prompt for the existing password to be entered (if it hasn’t
already been entered), see section 4.9.2.6 for more detail. Once the current password has been entered, the panel will prompt
for the new password.

4.9.2.1 Configure Modbus

Figure 4-22

You can change the baud rate for communication with detector with this menu. Default baud rate is 19200. The underlined
character indicate that the numeric keys can be used to change the baud rate. Valid entries are 0, 1 and 2 corresponding to
baud rate of 19200, 9600 and 4800 respectively.

Figure 4-23

REV – 2.2.1 [34-8708-4770-6 ] 30 | Page

R e a d i n g R e t r i e s : 1

2

Baud Rate

Reading Retries

19200 (Default)

12 (Default)

9600

8

4800

5

C a n D

i s c o v e r : 9 9 E n a b l e d : 9 9

F o u n d 0 6 o f 9 9 E

n a b l e d : 9 9

This is a delay added between frame for communication between detectors and panel. It is recommended to leave this to the
default value of 01 msec.

Figure 4-24

This parameter is number of times panel will attempt to receive readings from panel before going into trouble state. The
underlined characters indicate that the numeric keys can be used to change the value.

NOTE: Change the value of Reading Retries according to table below, every time the baud rate for the panel is changed.

Table 4-4 Baud Rate and Reading Retries

Figure 4-25

This menu option is useful for troubleshooting. Normally all sensors register automatically. This shows how many detectors the
panel can discover and how many of them are enabled. You can enable or disable any specific detector address entering this
menu. If any of the detector address is disabled, then the panel will not attempt communication with the corresponding
detector.

Figure 4-26

This menu shows how many detectors have been registered. In this example, the display example shows that panel has
discovered 6 detectors out of maximum possibility of 99. This means 93 more detectors can be connected to the panel.

4.9.2.2 Configure Sensor Type

Sensor Registration

Sensor registration is continuously monitored by the DVP-120M. When the currently selected sensor type agrees with the
stored registration information the DVP-120M will remain in normal mode. When new registration information is detected by
the DVP-120M, for example if a different gas type of Macurco sensor was installed, the following message is displayed:
“Configuration Changed Any key to save” is displayed.

REV – 2.2.1 [34-8708-4770-6 ] 31 | Page

Config. changed

Any key to save

Configure sensor

type

Type: 01 CO

Good definition

Type: 01

Tag: CO ♦

Type: 01 CO

Units: ppm ♦

Figure 4-27 Configuration Changed

Pressing any key will prompt user to enter the password. Once the valid password is entered the new sensor type is saved. The
program does not allow any other activity unless valid password is entered.

If the DVP-120M is in configuration mode (user is changing the configuration) the registration information is saved in the
background and the message indicating that configuration was changed is delayed until user goes back to normal mode.

Custom Sensor Implementation

Custom sensor types or “wildcards” can be configured with the DVP-120. There are 8 Macurco sensor types and 21 custom
sensor types available. Though the Macurco sensor data cannot be changed, custom sensor parameters can be configured to
define the sensor type:

Figure 4-28 Configure Sensor

From this menu you can access any of the following menus to change type parameters using the navigation key up, down, left
and right.

Figure 4-29 Sensor Definition

CO for carbon monoxide is one of the 8 Macurco sensor types already defined

Figure 4-30 Sensor Tag

“Tag” is a 3-character parameter and is used to identify the sensor type (i.e. CO, EX...)

“Units” is a 4-character parameter and indicates the engineering units (i.e. ppm, %LEL…)

REV – 2.2.1 [34-8708-4770-6 ] 32 | Page

Figure 4-31 Sensor Units

Type: 01 CO

Depletion: 0 No

Type: 01 CO

Dec.: 0 8888. ppm

Type: 01 CO

Res.: 1 ppm

Type: 01 CO

Range: 200 ppm

Type: 01 CO

Alarm: 200 ppm

Type: 01 CO

Warn: 100 ppm

Figure 4-32 Depletion Type

“Depletion” is “1” when the sensor is a depletion type and “0” when it is not a depletion type sensor. A depletion sensor detects
when gas concentrations in a space fall below a specified level.

Figure 4-33 Decimal Points

“Dec.” defines how many decimal points are used to display the reading, alarm, warning, range, rising and falling levels. It can
have values between 0 and 2.

Figure 4-34 Resolution

“Res.” Defines the resolution used to display the reading, alarm, warning, range, falling level and rising level. It can have values
between 1 and 500 when “Dec.” is 0, 50.0 when “Dec.” is 1 and 5.00 when “Dec.” is 2.

Figure 4-35 Sensor Range

“Range” is the value displayed when current measured is 20mA.

Figure 4-36 Alarm Level

“Alarm” is the default alarm range.

“Warn” is the default warning range.

REV – 2.2.1 [34-8708-4770-6 ] 33 | Page

Figure 4-37 Warning Level

Type: 01 CO

Rise: 35 ppm

Type: 01 CO

Fall: 15 ppm

Enter Password

* * * *

Enter Password

* * * *

Wrong Password

Figure 4-38 Rising Trip Point

“Rise” is the default rising level used in Zone configuration.

Figure 4-39 Falling Trip Point

“Fall” is the default falling level used in Zone configuration.

For the custom sensor types default parameters are set to display the current measured above 4 mA. So if the current is 4 mA, it
displays 0.00 mA. And when the current is 20 mA it displays 16.00 mA.

4.9.2.3 Enter Password

If the password has not yet been entered, when the first digit of any parameter is entered, the panel will prompt for the current
password. Note that the first digit entered is discarded; it does not count toward the password or toward the parameter entry.

Figure 4-40 Enter Password

When the first digit is entered, the panel will show.

Figure 4-41 Password Prompt

If the password is not entered correctly the panel will display

Figure 4-42 Wrong Password Prompt

Once the current password has been entered, the panel will prompt for the configuration parameter being changed.

If the password has been lost:

1. Power down the DVP-120M

2. Remove the Jumper Shorting Connector from the EXT header and place the Jumper Shorting Connector onto the top
two pins of the SYS header.

REV – 2.2.1 [34-8708-4770-6 ] 34 | Page

WARNING

Use only for monitoring the gases which the sensors and equipment are designed to detect.

325-3050.

Sensor 01 CO

A: 200 W: 50

Sensor 01 CO

Type: 1

3. Power up the DVP-120M. The first display is the current password on the unit.

4. Remove the Jumper Shorting Connector from the SYS header and install back onto the two bottom pins of the EXT
header.

Failure to do so may result in exposures to gases not detectable and result in serious injury or
death. For proper use, see supervisor or User manual, or Contact Technical Support at 1-844-

4.9.3 Configure Sensors Submenu

There is a list of parameters for each sensor in the system, either currently wired or configured but presently disconnected. The
left and right cursor keys can be used to move from one sensor to another and the up and down keys will scroll through the
parameters for the particular sensor.

4.9.3.1 Sensor Summary

Figure 4-43 Sensor Summary

This display example shows that the sensor on channel 01 has been configured as a Carbon Monoxide sensor with an Alarm
level of 200ppm and a Warning level of 50ppm.

Notice that the sensor number, 01 in this example, is underlined. This indicates that the digit keys can be used to jump to a
particular channel, even if there is no sensor connected to the channel.

4.9.3.2 Sensor Type

Figure 4-44 Sensor Type

This display example shows that the sensor on channel 01 has been configured as a Carbon Monoxide sensor. The valid entries
for Macurco type sensors are Carbon Monoxide (CO), Nitrogen Dioxide (NO
Sulfide (H

Setting the sensor type to 0 (zero) will cause the display to ask if the user wants to DELETE the sensor. If the answer is yes, the
configuration record for this sensor channel will be deleted and the channel will no longer be used to control the ventilation
system. When a sensor’s type is changed, the alarm level, warning level and range will be set to the default for the sensor type.

The following three parameters are not accessible until a sensor type of 1, 2 or 3 is selected.

S), Refrigerants (REF), Carbon Dioxide (CO2) and Oxygen (O2).

2

), Combustible Gas (EX), Ammonia (NH3), Hydrogen

2

REV – 2.2.1 [34-8708-4770-6 ] 35 | Page

Sensor 01 CO

Alarm: 200 ppm

Description

Carbon

Monoxide

Nitrogen

Dioxide

Combustible

Gas

Ammonia

Hydrogen

Sulfide

Refrigerants

Carbon Dioxide

(CD-6H, CD-6MC)

Oxygen

Carbon
Dioxide

(CD-6G)

Alarm

Level

200 ppm

5 ppm

20% LEL

75 ppm

20 ppm

300 ppm

4000 ppm

19.5%
v/v

0.50%
vol

Sensor 01 CO

Warning: 50 ppm

Description

Carbon

Monoxide

Nitrogen

Dioxide

Combustible

Gas

Ammonia

Hydrogen

Sulfide

Refrigerants

Carbon Dioxide

(CD-6H, CD-6MC)

Oxygen

Carbon

Dioxide

(CD-6G)

Warning

Level

100 ppm

3 ppm

15% LEL

50 ppm

14 ppm

200 ppm

1500 ppm

20.0%
v/v

0.15%
vol

Sensor 01 CO

Range: 200 ppm

Description

Carbon

Nitrogen

Combustible

Ammonia

Hydrogen

Refrigerants

Carbon Dioxide

Oxygen

Carbon

(CD-6G)

Range

200 ppm

5 ppm

50% LEL

100

ppm

50 ppm

1000 ppm

5000 ppm

25.0%
v/v

5.00%
vol

4.9.3.3 Alarm Set Point

Figure 4-45 Sensor Alarm Level

The default alarm levels for the sensors are:

Setting an alarm level of 0 (zero) will disable alarm detection for this sensor.

4.9.3.4 Warning Set Point

Figure 4-46 Sensor Warning Level

The default warning levels for the sensors are:

Setting a warning level of 0 (zero) will disable warning detection for this sensor.

4.9.3.5 Range

Figure 4-47 Sensor Range

The range for each sensor is the gas concentration that corresponds to the 20-mA signal level.

The default range values for the sensors are:

Monoxide

Dioxide

Gas

Sulfide

(CD-6H, CD-6MC)

Dioxide

REV – 2.2.1 [34-8708-4770-6 ] 36 | Page

Relay 1 Norm.Off

Mode: 2

Relay 1 Delay On

(mm:ss) 01:00

Relay 1 Min.On

(mm:ss) 01:00

4.9.4 Configure Relays, Horn & Strobe Submenu

There is a list of parameters for each relay in the system. The left and right cursor keys can be used to move from one relay,
horn or strobe to another and the up and down keys will scroll through the parameters for the particular relay, horn or strobe.

4.9.4.1 Relay Mode

Figure 4-48 Relay Mode

This display example shows that relay 1 is configured to operate in the Normally Off mode. The relay modes are:

• 1 ALARM

• 2 Normally Off (default)

• 3 Normally On

Relay mode 1 is a special case. This mode is only available on relay 1 and dedicates the relay to function as an alarm signal to a
subsequent alarm or monitoring panel. This mode forces the relay to Normally Off mode with no turn on delay or minimum on
time. See Section 3.1.4 for more detail regarding alarms

Fail Safe operation can be implemented by configuring a relay to operate Normally On, and wiring the circuit using the NC
(normally closed) contact. In this way, if the control panel loses power the relay will turn on the controlled device if it still has
power.

4.9.4.2 Relay Turn on Delay

Figure 4-49 Turn on Delay

The default turn on delay is one minute and the maximum allowed value is fifteen minutes. The value is entered in two groups,
2 digits for the minutes and then 2 digits for the seconds. A leading zero must be entered for each group if applicable.

4.9.4.3 Relay Minimum on Time

Figure 4-50 Minimum on time

The default minimum on time is one minute and the maximum allowed value is fifteen minutes.

REV – 2.2.1 [34-8708-4770-6 ] 37 | Page

Horn 4

Delay On

Horn Delay On

(mm:ss) 01:00

Horn Min.On

(mm:ss) 00:00

Strobe 5

Delay On

4.9.5 Configure Horn Submenu

The configuration parameters for the horn are similar to those for relays. A horn would not normally require a minimum on
time, but this parameter allows a more versatile configuration.

4.9.5.1 Horn Summary

Figure 4-51 Horn Summary

This display example shows that the horn has been configured to operate with a turn on delay and no minimum on time.

Notice that the horn number, 4, is underlined. This indicates that the digit keys can be used to jump to a particular relay, horn or
strobe. The relays are numbers 1, 2 and 3; the horn is number 4 and the strobe is 5.

4.9.5.2 Horn Turn on Delay

Figure 4-52 Horn Turn on Delay

The default turn on delay is one minute and the maximum allowed value is fifteen minutes.

4.9.5.3 Horn Minimum on Time

Figure 4-53 Minimum on Time

The Default minimum on time is zero and the maximum allowed value is fifteen minutes.

4.9.6 Configure Strobe Submenu

The configuration parameters for the strobe are the same as those for relays. A strobe would not normally require a minimum
on time, but this parameter allows a more versatile configuration.

4.9.6.1 Strobe Summary

Figure 4-54 Strobe Summary

This display example shows that the strobe has been configured to operate with a turn on delay and no minimum on time.

Notice that the strobe number, 5, is underlined. This indicates that the digit keys can be used to jump to a particular relay, horn
or strobe. The relays are numbers 1, 2 and 3; the horn is number 4 and the strobe is 5.

REV – 2.2.1 [34-8708-4770-6 ] 38 | Page

Strobe Delay On

(mm:ss) 01:00

Strobe Min.On

(mm:ss) 00:00

Zone 1 Controls

R 1 R 2 R 3 H 4 S 5

4.9.6.2 Strobe Turn on Delay

Figure 4-55 Strobe Turn on Delay

The default turn on delay is one minute and the maximum allowed value is fifteen minutes.

4.9.6.3 Strobe Minimum on Time

Figure 4-56 Strobe Minimum on Time

The default minimum on time is zero and the maximum allowed value is fifteen minutes.

4.9.7 Configure Zones Submenu

The DVP-120 ventilation control can support up to three zones. The zone functionality makes the DVP-120 very flexible. For
example, each zone can be configured to monitor a separate set of four sensors and control a single relay.

Another control scheme uses one zone to monitor all sensors and turn one relay on at a relatively low gas concentration. A
second zone monitors the same sensors and turns on a second relay if the gas concentration reaches a higher level. The third
zone can also monitor the same relays turning the last relay on as a signaling device to a live monitor station, as well as turning
on the external horn and strobe, under the assumption that the ventilation system is not working.

In addition to controlling the relays based on the gas concentration, each zone can have a timed function, e.g. turn on low
volume ventilation fans at 7:00 AM and turn them off at 8:00 PM.

The default Ventilation Controls are:

• Zone 1 controls Relay 1

• Zone 2 controls Relay 2

• Zone 3 controls Relay 3

4.9.7.1 Zone Controls

Figure 4-57 Zone Controls

This display example shows that Zone 1 is configured to control all of the relays plus the horn and the strobe. Each of the relays,
the horn and the strobe can be removed from (or added to) the zones control by pressing the indicated digit key. By default,
Zone 1 will control Relay 1, Zone 2 will control Relay 2 and Zone 3 will control Relay 3.

Definitions:

• Zone – Defines Sensor Input & Relay / Alarm Output

• Group – Set of Sensors of same type and output within the same zone.

• Average – Activation based upon an average of sensors in a group

REV – 2.2.1 [34-8708-4770-6 ] 39 | Page

Z1 Group 1 NO2

Sensor TyPe: 2

• Voting – Number of sensors needed to be above trip point to activate output

• Quorum – Number of sensors need to vote, 1 = any sensor.

The digit controls are:

• 1 - Relay 1 added/removed from the zone’s control

• 2 - Relay 2 added/removed from the zone’s control

• 3 - Relay 3 added/removed from the zone’s control

• 4 - Horn added/removed from the zone’s control

• 5 - Strobe added/removed from the zone’s control

When controlled by a zone the default horn pattern is continuous, see 3.3.8.7 and the strobe will turn on continuously when a
zone is controlling them.

Each zone can have up to three control groups defined. Each group either monitors a sensor type or implements a timer
function.

4.9.7.2 Zone Group Type

Figure 4-58 Zone Group Type

This display example shows that group 1 in zone 1 will be monitoring Nitrogen Dioxide sensors. The valid Types are:

• 0 Timed

• 1 Carbon Monoxide (CO)

• 2 Nitrogen Dioxide (NO

)

2

• 3 Combustible (EX)

• 4 Ammonia (NH

• 5 Hydrogen Sulfide (H

)

3

S)

2

• 6 Refrigerants (REF)

• 7 currently unused

• 8 Oxygen (O

• 9 Carbon Dioxide (CO

• 10 Carbon Dioxide (CO

)

2

) (CD-6H, CD-6MC)

2

) (CD-6G)

2

NOTE: If CX-6 is connected to DVP-120M, it will occupy two address and appear as one CO (Type 1) sensor and one NO2
(Type 2) sensor on the panel. Refer to section 3.2.7 for details on address occupied when CX-6 is connected to DVP-120M.

The default Types are:

• Group 1 in each zone Type 1 CO Voting mode Quorum = 1

• Group 2 in each zone Type 2 NO

Voting mode Quorum = 1

2

• Group 3 in each zone Type 3 EX Voting mode Quorum = 1

• Group 4 in each zone Type 4 NH

• Group 5 in each zone Type 5 H

Voting mode Quorum = 1

3

S Voting mode Quorum = 1

2

• Group 6 in each zone Type 6 REF Voting mode Quorum = 1

• Group 7 in each zone currently unused

• Group 8 in each zone Type 8 O

Voting mode Quorum = 1

2

REV – 2.2.1 [34-8708-4770-6 ] 40 | Page

Z1 Group 1 Timed

Days: 1 WEekdays

Z1 Group 1 Timed

Start TimE: 07:00

Z1 Group 1 Timed

Stop Time: 18:00

Z1 Group 1 NO2

Sensor: 02, 04, 11

• Group 9 in each zone Type 9 CO

• Group 10 in each zone Type 10 CO

Timed mode turns the zone’s outputs on at the START TIME if the current day is a weekday (or a weekend) and turns them off at
the next occurrence of STOP TIME. The other three modes turn the outputs on if the gas concentration indicated by that type of
sensor is at or above the Rising Trip Point and turns the outputs off if the concentration is less than or equal to the Falling Trip
Point.

4.9.7.3 Timed Day Selection

Valid entries are:

• 1 Weekdays, Monday thru Friday, (default)

• 2 Weekends, Saturday and Sunday

4.9.7.4 Start Time

Voting Mode Quorum = 1

2

Voting Mode Quorum = 1

2

Figure 4-59 Timed Days Selection

Figure 4-60 Start Time Selection

The start time is entered in 24-hour format and the default value is 07:00 (7:00 AM).

4.9.7.5 Stop Time

Figure 4-61 Stop Time Selection

The stop time is entered in 24-hour format and the default value is 18:00 (6:00 PM).

4.9.7.6 Sensor Selection

Figure 4-62 Sensor Selection

Sensors are included or removed from the group by entering the two-digit channel number. After a sensor is added or removed,
the list will be re-sorted so it does not matter in which order the sensors are added or removed. The default is to include all
sensors of the specified type.

When the first digit of a sensor number is entered (a leading zero must be entered if the number is less than ten), the display
will prompt to Add or Remove a sensor from the group.

REV – 2.2.1 [34-8708-4770-6 ] 41 | Page

Z1 Group 1 NO2

Add/Remove: 0 0

Z1 Group 1 NO2

Rising: 2.5 ppm

Description

Carbon

Monoxide

Nitrogen

Dioxide

Combustible

Gas

Ammonia

Hydrogen

Sulfide

Refrigerants

Carbon Dioxide

(CD-6H, CD-6MC)

Oxygen

Carbon

Dioxide

(CD-6G)

Type

CO

NO2

EX

NH3

H2S

REF

CO2

O2

CO2

Rising Level

35 ppm

2.5 ppm

10% LEL

25 ppm

8 ppm

100 ppm

1,000 ppm

20.3%
v/v

0.10%
vol

Z1 Group 1 NO2

Falling: 1.0 ppm

Description

Carbon

Monoxide

Nitrogen

Dioxide

Combustible

Gas

Ammonia

Hydrogen

Sulfide

Refrigerants

Carbon Dioxide

(CD-6H, CD-6MC)

Oxygen

Carbon

Dioxide

(CD-6G)

Type

CO

NO2

EX

NH3

H2S

REF

CO2

O2

CO2

Falling

Level

15 ppm

1.2 ppm

5% LEL

10 ppm

3 ppm

50 ppm

800 ppm

20.6%
v/v

0.08%
vol

Figure 4-63 Add/Remove Sensor Prompt

When the second digit is entered, the sensor will be added or removed from the control group, provided the sensor is of the
proper type, NO

in this example. If the sensor is of the wrong type, or an invalid sensor channel number is entered, the request

2

will not be completed.

4.9.7.7 Rising Trip Point

Figure 4-64 Rising Trip Point Entry

The default rising trip points are:

4.9.7.8 Falling Trip Point

The default falling trip points are:

Figure 4-65 Falling Trip Point Entry

REV – 2.2.1 [34-8708-4770-6 ] 42 | Page

Z1 Group 1 NO2

Mode: 2 Voting

Z1 Group 1 NO2

Quorum: 0 2

Alarm Signals

Buzz, Horn, StrobE

4.9.7.9 Multiple Sensor Mode

Figure 4-66 Sensor Mode Selection

When multiple sensors are being monitored by a group, the output decision can be based on either voting, as shown here, or
the average of all sensors in the group. Valid modes are:

• 1 Average

• 2 Voting (default)

When the configuration is Average, the gas concentrations from all sensors in the group are averaged and if the average is
greater than or equal to the rising trip point the zone outputs(s) are activated. When the average is less than or equal to the
falling trip point the zone output(s) are de-activated. If the average is between the two trip points, the outputs remain in their
previous state.

When the configuration is Voting, the number of sensors in the group indicating a value greater than or equal to the rising trip
point is counted. If the count is greater than or equal to the quorum then the zone output(s) are activated. If the count of
sensors indicating less than or equal to the falling trip point is greater than or equal to the quorum the zone output(s) are de­activated. Activating the output(s) is given priority if a group has an equal number of sensors with gas readings greater than or
equal to the rising trip point and sensors with readings less than or equal to the falling trip point.

4.9.7.10 Multiple Sensor Quorum

Figure 4-67 Quorum Entry

It is up to the installer to ensure that the quorum entry is appropriate for the configuration. Valid entries are one to twelve, but
a value greater than the number of sensors being monitored by the group, stops the group from controlling the outputs. The
default quorum value is 1.

4.9.8 Configure Signals Submenu

The DVP-120M can drive the buzzer, horn and strobe with different sound patterns to indicate the severity of the current
conditions. These patterns are selectable by the installer using this group of submenus. Once again, the left and right keys will
scroll through the signal types and the up and down keys will scroll to the signal sources.

4.9.8.1 Alarm Signal Summary

The alarm signals are in response to one or more sensors indicating gas levels at or above the sensors’ configured alarm level.

This display example shows that alarms are signaled by the internal buzzer, the external horn and the strobe.

REV – 2.2.1 [34-8708-4770-6 ] 43 | Page

Figure 4-68 Alarm Signals

Alarm Signals

BuZz: 2 Intermit.

Alarm Signals

Horn: 2 Intermit.

Alarm Signals

Strobe: 1 Contin.

4.9.8.2 Alarm Buzzer Signal

Figure 4-69 Buzzer Alarm Signal

This display example shows that the buzzer will signal an alarm condition with an intermittent signal. The signal definitions are:

• 1 Continuous

• 2 Intermittent, one second on at two second intervals (default)

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 15 second intervals

• 5 Off, buzzer will not so

4.9.8.3 Alarm Horn Signal

Figure 4-70 Horn Alarm Signal

This display example shows that the horn will signal an alarm condition with an intermittent signal. The signal definitions are:

• 1 Continuous

• 2 Intermittent, one second on at two second intervals (default)

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 10 second intervals

• 5 Off, horn will not sound

4.9.8.4 Alarm Strobe Signal

Figure 4-71 Strobe Alarm Signal

This display example shows that the strobe will signal an alarm condition with a continuous signal. The signal definitions are:

• 1 Continuous (default)

• 2 Intermittent, one second on at two second intervals

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 10 second intervals

• 5 Off, strobe will not flash

REV – 2.2.1 [34-8708-4770-6 ] 44 | Page

Warning Signals

Buzz

Warning Signals

Buzz: 5 OFF

Warning Signals

Horn: 5 OFF

Warning Signals

Strobe: 5 OFF

4.9.8.5 Warning Signal Summary

The warning signals are in response to one or more sensors indicating gas levels at or above the sensors’ configured warning
level.

Figure 4-72 Warning Signals

This display example shows that warnings are signaled by the internal Buzzer only.

4.9.8.6 Warning Buzzer Signal

Figure 4-73 Buzzer Warning Signal

This display example shows that the buzzer will not signal a warning condition. The signal definitions are:

• 1 Continuous

• 2 Intermittent, one second on at two second intervals

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 10 second intervals

• 5 Off, buzzer will not sound (default)

4.9.8.7 Warning Horn Signal

Figure 4-74 Horn Warning Signal

This display example shows that the horn will not signal a warning condition. The signal definitions are:

• 1 Continuous

• 2 Intermittent, one second on at two second intervals

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 10 second intervals

• 5 Off, horn will not sound (default)

4.9.8.8 Warning Strobe Signal

This display example shows that the strobe will not signal a warning condition. The signal definitions are:

REV – 2.2.1 [34-8708-4770-6 ] 45 | Page

Figure 4-75 Strobe Warning Signal

Trouble Signals

Buzz

Trouble Signals

Buzz: 4 Triple

Trouble Signals

Horn: 5 OFF

• 1 Continuous

• 2 Intermittent, one second on at two second intervals

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 10 second intervals

• 5 Off, strobe will not flash (default)

4.9.8.9 Trouble Signal Summary

The trouble signals are in response to one or more sensor faults, either as a defined current level, or because of wiring
problems.

Figure 4-76 Trouble Signals

This display example shows that troubles are signaled by the internal buzzer only.

4.9.8.10 Trouble Buzzer Signal

Figure 4-77 Buzzer Trouble Signal

This display example shows that the buzzer will signal a trouble condition with a triple tap signal. The buzzer signal definitions
are:

• 1 Continuous

• 2 Intermittent, one second on at two second intervals

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 10 second intervals (default)

• 5 Off, buzzer will not sound

4.9.8.11 Trouble Horn Signal

Figure 4-78 Horn Trouble Signal

This display example shows that the horn will not signal a trouble condition. The horn signal definitions are:

• 1 Continuous

• 2 Intermittent, one second on at two second intervals

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 10 second intervals

• 5 Off, horn will not sound (default)

REV – 2.2.1 [34-8708-4770-6 ] 46 | Page

Trouble Signals

Strobe: 5 OFF

4.9.8.12 Trouble Strobe Signal

Figure 4-79 Strobe Trouble Signal

This display example shows that the strobe will not signal a trouble condition. The strobe signal definitions are:

• 1 Continuous

• 2 Intermittent, one second on at two second intervals

• 3 Double tap, two beeps at 5 second intervals

• 4 Triple tap, three short beeps at 10 second intervals

• 5 Off, strobe will not flash (default)

REV – 2.2.1 [34-8708-4770-6 ] 47 | Page

WARNING

Do not disassemble unit or attempt to repair or modify any component of this instrument. This

affect product performance and void product warranty.

5 Troubleshooting

The DVP-120M is tested at the factory for reliable operation. Most problems can be traced to the set-up of configurable
features and modes, system wiring or trouble with the sensors.

instrument contains no user serviceable parts, and substitution of components may adversely

5.1 System Status Light

The system status light (section 3 Operation) is normally green indicating power is present but will change to yellow whenever
the controlling firmware detects a Trouble condition. Possible trouble conditions are:

• Any configured channel has less than 4 mA flowing in the current loop

• A sensor is reporting a trouble condition

• Any configured channel wiring is open.

• Internal controller board problems are detected.

5.1.1 Input Channel Trouble

Any time the POWER light is yellow, the first thing the technician should consider is that one of the input channels is in trouble.
Reviewing the Sensor Status displays (using the up and down keys), should reveal which channel has a problem since the gas
reading will be replaced with the word TROUBLE. Be sure that the 4-20mA output on each sensor is set to “On”.

5.1.1.1 No Sensor

A common source of a trouble condition is an input channel that is configured for a sensor that does not exist. In this case, the
system expects to see current flowing within the current loop, but there cannot be current if there is no sensor connected.
Either fix the miss-wired sensor, or change the sensor type to NONE, section 3.3.3.2. After returning to normal mode (using the
MENU key), the power light should return to steady green. Be sure that the 4-20mA output on each sensor is set to “On”.

5.1.1.2 Wrong Sensor Type

If all channels are configured properly, another source a trouble condition could be the type of sensor attached to an input
channel. Macurco™ Toxic sensors can indicate high gas concentrations with signals of up to 24 mA in the current loop. However,
a combustible sensor can indicate a trouble condition with a 21-mA signal. Therefore, a toxic sensor connected to channel which
is configured for a combustible sensor can cause a fault indication if the gas concentration is high enough.

5.1.1.3 Sensor Trouble

All Macurco™ Sensors are either supplied with a STATUS lamp that will indicate the health of the device or will display a trouble
condition on the digital display. Macurco sensors may be tested by depressing the TEST button on the sensor printed circuit
board, or (depending on the type of sensor), the button on the interior front panel of the unit. Macurco sensors will step the
output current level from 4 mA to 20 mA over the course of the warm-up period, allowing the technician to determine where
the trouble condition exists. If the sensor is still in a trouble condition, resetting the power may clear the trouble condition.
Remove one of the power wires from the sensor terminal strip causing the sensor to go through a power-up reboot. Be sure
that the 4-20mA output on each sensor is set to “On”.

5.1.1.4 Faulty Wiring

Finally, the wiring between the DVP-120M and the sensor should be investigated. The power input to the sensor should be
investigated at the sensor. Since Macurco sensors are rated for operation between 12 and 24 VDC or VAC, the voltage drop
between the DVP-120M and the sensor should not be an issue if the wiring guidelines in Table 2-2 are followed. A multi-meter
can be inserted to check the current flow within the loop, or a continuity test can be performed on all four wires between the
REV – 2.2.1 [34-8708-4770-6 ] 48 | Page

WARNING

High voltage terminals (120/240 VAC) are located within the DVP-120C, presenting a hazard to

internal circuits. Ensure power is removed from the DVP-120C prior to servicing the unit.

WARNING

DVP-120M may not function effectively below 32°F (0°C) or above 120°F (49°C). Using the
equipment outside of this temperature range may adversely affect product.

DVP-120M and the sensor. Ensure power is removed from the DVP-120M prior to removing the input or output connectors
from the DVP-120M controller board. Be sure that the 4-20mA output on each sensor is set to “On”.

5.1.1.5 Resettable Fuse

Each sensor channel is provided with a PTC-resettable fuse internal to the DVP-120M to protect against over current situations.
To reset a sensor channel, power should be removed from the channel. This can be accomplished by removing power from the
sensor – causing the loop current to go to zero, or by completely removing power from the DVP-120M.

5.1.2 Internal Controller board Trouble

If the sensor status display and investigative efforts reveal no problems with the input channel current loops and channel
configuration, the most likely trouble condition is an internal problem detected by the DVP-120M controller. In this case,
contact the Macurco Technical Service for advice and help.

5.2 Timed Ventilation Problem

When using the timed ventilation mode, the system clock should be checked regularly (at least twice a year). The battery
backed real time clock in the DVP-120M does not adjust for daylight saving time so the spring and fall switch over points are
good choices to check the system clock.

service technicians. Only qualified technicians should open the DVP-120C case and service the

5.3 No Power

The DVP-120M starts up as soon as power is applied to the microcontroller, and the DVP-120M is designed to have power
continuously applied to the unit. An external indication of successful power application to the unit is the immediate operation of
the Status Lamps grouped around the LCD. If the operator does not see immediate response from the status lamps, power
should be checked at AC~

If the correct voltage is noted at AC~, then the internal fuse of the DVP-120M should be investigated. The DVP-120M is
protected from over-current and transient situations by the fuse at F3. AFTER removing power from the DVP-120M, F3 can be
checked by removing the safety cover. If necessary, replace F3 with a 5x20 mm SLO-BLO fuse with a rating of 1 Amp 250V, e.g.
Littelfuse P/N 218001. Be sure to REPLACE THE SAFETY COVER on F3 before re-applying power to the DVP-120M.

5.4 LCD Display Unreadable

It is possible that the LCD is unreadable due to temperature or aging of the control panel. If this is the case the following steps
should rectify the problem:

• Hold the MENU key for three (3) seconds. After three seconds, the power led will turn red. After two additional
seconds, the LCD backlight will also be turned off.

• Press the UP and DOWN cursor keys to change the LCD contrast. Each press of the UP or DOWN cursor key will change
the contrast by a step in that direction. Adjust the contrast for best viewing.

• Press any other key to exit the contrast-setting mode.

REV – 2.2.1 [34-8708-4770-6 ] 49 | Page

5.5 Keypad does not respond

5.5.1 LCD shows KEYS LOCKED

The keypad can be unlocked by holding the zero (0) key for 3 seconds. At this time the backlight will turn on and the display will
return to normal mode. The keypad can again be locked by holding the zero key for 3 seconds, until the display shows KEYS
LOCKED.

5.5.2 After silencing Alarm, Warning or Trouble

LCD continues to show the alarm, warning or trouble message.

It is possible that the horn or strobe have been configured to respond in alarm, warning or trouble conditions, even though
there is no horn or strobe connected (or perhaps they are used for some purpose that is not audible or visible). First, hold the
HUSH key for five seconds, or until the display changes to “ALARM silenced for 5 minutes” or other relevant message. Second,
use the configuration menu to disable the horn or strobe, if they are not being used for some other purpose.

5.6 Power Failure

After any power failure, the user should check the system clock. While system parameters are maintained in memory, the
system clock is backed-up by a limited-capacity button cell battery.

5.7 MRS-485 Modbus Application

The MRS-485 will monitor the 4-20 mA current output of the detector. At power up and during its warm-up period, the 6-Series
detector will communicate its sensor type over the 4-20 current output using a custom protocol. The MRS-485 will automatically
register each 6-Series detector as it is programmed with information about all the detectors to which it can be connected. The
MRS-485 will use this information to determine the gas level sensed by the 6-Series detector by measuring the 4-20 mA current­loop output during normal operation of the detector.

5.7.1 Normal Operation

1. When the LED is solid GREEN, operation is normal, the MRS-485 knows the detector type, no errors are detected, and
no MODBUS data are being received or transmitted over the RS-485 line.

2. When the LED is GREEN with random bursts of AMBER, operation is normal and now data are being received or
transmitted over the RS-485 line. The AMBER LED will come on anytime that there is data traffic.

5.7.2 Unknown Sensor Code

GREEN/OFF Alternating every 500 milliseconds - The MRS-485 doesn’t know the detector type, no MODBUS communications is
in progress and no errors are detected.

To correct this condition:

1. Disconnect the power line from the MRS-485.

2. Disconnect the MODBUS line from the MRS-485.

3. Re-connect the Modbus Line to the MRS-485.

4. Re-connect the power line to the MRS-485.

5.7.3 Error Codes

Solid RED - The MRS-485 detected an error and no MODBUS communications are in progress.

RED with random bursts of AMBER - The MRS-485 detected an error and AMBER is displayed when data are received or
transmitted over the RS-485 line.

REV – 2.2.1 [34-8708-4770-6 ] 50 | Page

There are a number of conditions which are signalized in this way:

• Current EEPROM Settings not initialized

• Current EEPROM Settings have bad checksum

• Factory EEPROM Settings not initialized

• Factory EEPROM Settings have bad checksum

• Unknown Sensor exponent value

• Watchdog reset

• Loaded Factory EEPROM Settings in EEPROM Current Settings

• Latched sensor types different than registered sensor type

• Unknown sensor type because registration failed

5.7.4 Dip Switch Settings Codes

RED/GREEN Alternating every 200 milliseconds indicates that MRS-485 is in programming mode and waiting for user to

enter new settings using the 8 switches.

RED/OFF Alternating every 200 milliseconds indicates that saving new settings failed.

GREEN/OFF Alternating every 200 milliseconds indicates that saving new settings passed.

RED/OFF Alternating every 500 milliseconds indicates that selected MODBUS address is not an accepted value.

REV – 2.2.1 [34-8708-4770-6 ] 51 | Page

Key in Keypad

Functionality Test

0

Strobe

9

Horn

Menu

Relay 1

Hush

Relay 2

Up

Relay 3

Right

Buzzer

6 Testing & Maintenance

Macurco recommends performing the DVP Functionality Test at least once a year.

6.1 Testing

6.1.1 Keypad Test

1. Power down the DVP-120M.

2. Remove the Jumper Shorting Connector from the EXT header and place the Jumper Shorting Connector onto the

top two pins of the SYS header.

3. Power up the DVP-120M and close the panel door. The LCD will display “Current Password ####” for 3 seconds

(where #### is the current set password) then will display “V24 =##. #-OK”, where V24 is the expected Power
Supply output voltage and the ##.# is the actual Power Supply output voltage. If the status is OK, then proceed to
the test process by pressing 0 key.

4. Read and follow the instruction on the LCD to test the keypad. When finished, the LCD will display “Keypad Test OK

0-Control Buzzer”.

5. Press 0 key to test the buzzer. You will hear the buzzer sound. To turn off the sound, press the 0 key again.

6. When the keypad test has passed, and the buzzer sound is good, turn off the power of the DVP-120M.

7. Remove the jumper shorting connector from SYS header and install onto the two bottom pins of EXT header

marked +24V.

8. Turn ON the DVP-120M and it should operate as explained in section 4.2 Initial Operating Mode

6.1.2 Functionality Test

1. Turn off the DVP-120M.

2. Move the jumper in J10 to left two pins of J10.

3. Turn on DVP-120M.

Self-test is performed when the panel is powered on with a jumper in the position indicated in above step. A self-test pass is
indicated by “Test Mode mm: ss – Press any key” on the LCD where “mm” are minutes and “ss” are seconds. Confirm “ss” is
incremented every second.

.

4. Press following keys in the keypad to test corresponding functionality.

Table 7-1 Keypad keys for Testing Functionality

5. If all test is complete, turn off the DVP-120M. Move the jumper back to right two pins of J10 for DVP-120M.

6. Turn ON DVP-120M and verify the normal operation as explained in section 4.2 Initial Operating Mode

.

6.2 Maintenance

DVP-120M do not have parts that require regular maintenance.

For fuse, replacement see Section 5.3 No Power

In the event of trouble or any kind of help and support contact Technical Support at 1-844-325-3050

REV – 2.2.1 [34-8708-4770-6 ] 52 | Page

of the manual.

7 Appendix A – Table of Figures

Figure 3-1 Mounting Holes ............................................................................................................................................................... 10

Figure 3-2 Typical Layout .................................................................................................................................................................. 10

Table 3-1 Main Power Connections .................................................................................................................................................. 11

Figure 3-4 Analog Sensor Interface Connector ................................................................................................................................. 12

Table 3-2 Recommended Wire Gauge .............................................................................................................................................. 13

Figure 3-6 Digital Sensor Interface Connector .................................................................................................................................. 13

Table 3-3 Wire selection for 60W power supply .............................................................................................................................. 15

Figure 3-7 Relay Connector............................................................................................................................................................... 15

Table 3-4 Wire gauge for Horn & Strobe functions .......................................................................................................................... 16

Figure 3-8 MRS-485 Installation ....................................................................................................................................................... 16

Figure 3-9 Modbus wiring diagram ................................................................................................................................................... 17

Figure 3-10 EOL Placement ............................................................................................................................................................... 17

Figure 3-11 EOL Placement Less than 1000ft ................................................................................................................................... 19

Figure 3-12 EOL Placement greater than 1000ft .............................................................................................................................. 19

Figure 3-13 MRS-485 DIP switch (address “50” shown) ................................................................................................................... 19

Table 3-5 DIP switch settings ............................................................................................................................................................ 20

Figure 4-1 Model Display .................................................................................................................................................................. 21

Figure 4-2 Warm-Up display ............................................................................................................................................................. 21

Figure 4-3 Keypad layout .................................................................................................................................................................. 22

Figure 4-4 Normal System Display .................................................................................................................................................... 23

Figure 4-5 Sensor Prompt ................................................................................................................................................................. 23

Figure 4-6 Alarm Display ................................................................................................................................................................... 24

Figure 4-7 Alarm Silenced message .................................................................................................................................................. 24

Figure 4-8 Warning Display ............................................................................................................................................................... 25

Figure 4-9 Warning Silenced Message .............................................................................................................................................. 25

Figure 4-10 Trouble Display .............................................................................................................................................................. 25

Figure 4-11 Trouble Silenced message ............................................................................................................................................. 26

Figure 4-12 Zone signal Display ........................................................................................................................................................ 26

Figure 4-13 Zone Signal Silenced Message ....................................................................................................................................... 26

Figure 4-14 Hardware Summary ....................................................................................................................................................... 27

Figure 4-15 Save Configuration Prompt............................................................................................................................................ 27

Figure 4-16 Set Time of Day .............................................................................................................................................................. 28

Figure 4-17 Enter Hours .................................................................................................................................................................... 28

Figure 4-18 Enter Minutes ................................................................................................................................................................ 28

Figure 4-19 Set Day of the week ....................................................................................................................................................... 29

Figure 4-20 Load Default Configuration............................................................................................................................................ 29

Table 4-1 Default settings ................................................................................................................................................................. 30

Figure 4-21 Change Password ........................................................................................................................................................... 30

Figure 4-22 ........................................................................................................................................................................................ 30

Figure 4-23 ........................................................................................................................................................................................ 30

Figure 4-24 ........................................................................................................................................................................................ 31

Table 4-4 Baud Rate and Reading Retries ......................................................................................................................................... 31

Figure 4-25 ........................................................................................................................................................................................ 31

Figure 4-26 ........................................................................................................................................................................................ 31

Figure 4-27 Configuration Changed .................................................................................................................................................. 32

Figure 4-28 Configure Sensor ........................................................................................................................................................... 32

Figure 4-29 Sensor Definition ........................................................................................................................................................... 32

REV – 2.2.1 [34-8708-4770-6 ] 53 | Page

Figure 4-30 Sensor Tag ..................................................................................................................................................................... 32

Figure 4-31 Sensor Units ................................................................................................................................................................... 32

Figure 4-32 Depletion Type............................................................................................................................................................... 33

Figure 4-33 Decimal Points ............................................................................................................................................................... 33

Figure 4-34 Resolution ...................................................................................................................................................................... 33

Figure 4-35 Sensor Range ................................................................................................................................................................. 33

Figure 4-36 Alarm Level .................................................................................................................................................................... 33

Figure 4-37 Warning Level ................................................................................................................................................................ 33

Figure 4-38 Rising Trip Point ............................................................................................................................................................. 34

Figure 4-39 Falling Trip Point ............................................................................................................................................................ 34

Figure 4-40 Enter Password .............................................................................................................................................................. 34

Figure 4-41 Password Prompt........................................................................................................................................................... 34

Figure 4-42 Wrong Password Prompt ............................................................................................................................................... 34

Figure 4-43 Sensor Summary ............................................................................................................................................................ 35

Figure 4-44 Sensor Type ................................................................................................................................................................... 35

Figure 4-45 Sensor Alarm Level ........................................................................................................................................................ 36

Figure 4-46 Sensor Warning Level .................................................................................................................................................... 36

Figure 4-47 Sensor Range ................................................................................................................................................................. 36

Figure 4-48 Relay Mode .................................................................................................................................................................... 37

Figure 4-49 Turn on Delay................................................................................................................................................................. 37

Figure 4-50 Minimum on time .......................................................................................................................................................... 37

Figure 4-51 Horn Summary ............................................................................................................................................................... 38

Figure 4-52 Horn Turn on Delay ........................................................................................................................................................ 38

Figure 4-53 Minimum on Time ......................................................................................................................................................... 38

Figure 4-54 Strobe Summary ............................................................................................................................................................ 38

Figure 4-55 Strobe Turn on Delay ..................................................................................................................................................... 39

Figure 4-56 Strobe Minimum on Time .............................................................................................................................................. 39

Figure 4-57 Zone Controls................................................................................................................................................................. 39

Figure 4-58 Zone Group Type ........................................................................................................................................................... 40

Figure 4-59 Timed Days Selection ..................................................................................................................................................... 41

Figure 4-60 Start Time Selection ....................................................................................................................................................... 41

Figure 4-61 Stop Time Selection ....................................................................................................................................................... 41

Figure 4-62 Sensor Selection ............................................................................................................................................................ 41

Figure 4-63 Add/Remove Sensor Prompt ......................................................................................................................................... 42

Figure 4-64 Rising Trip Point Entry.................................................................................................................................................... 42

Figure 4-65 Falling Trip Point Entry ................................................................................................................................................... 42

Figure 4-66 Sensor Mode Selection .................................................................................................................................................. 43

Figure 4-67 Quorum Entry ................................................................................................................................................................ 43

Figure 4-68 Alarm Signals ................................................................................................................................................................. 43

Figure 4-69 Buzzer Alarm Signal ....................................................................................................................................................... 44

Figure 4-70 Horn Alarm Signal .......................................................................................................................................................... 44

Figure 4-71 Strobe Alarm Signal ....................................................................................................................................................... 44

Figure 4-72 Warning Signals ............................................................................................................................................................. 45

Figure 4-73 Buzzer Warning Signal ................................................................................................................................................... 45

Figure 4-74 Horn Warning Signal ...................................................................................................................................................... 45

Figure 4-75 Strobe Warning Signal ................................................................................................................................................... 45

Figure 4-76 Trouble Signals ............................................................................................................................................................... 46

Figure 4-77 Buzzer Trouble Signal..................................................................................................................................................... 46

REV – 2.2.1 [34-8708-4770-6 ] 54 | Page

Figure 4-78 Horn Trouble Signal ....................................................................................................................................................... 46

Figure 4-79 Strobe Trouble Signal ..................................................................................................................................................... 47

Table B-1 Default settings ................................................................................................................................................................. 57

Figure B-1 System Wiring Diagram ................................................................................................................................................... 58

Figure B-2 Hardware Summary ......................................................................................................................................................... 58

Figure B-3 Keypad Layout ................................................................................................................................................................. 58

Figure B-4 Save Configuration Prompt ............................................................................................................................................. 59

Figure B-5 Set Time of Day ................................................................................................................................................................ 59

Figure B-6 Set Day of the Week ........................................................................................................................................................ 60

Figure B-7 Load Default Configuration ............................................................................................................................................. 60

Figure B-8 Change Password ............................................................................................................................................................ 60

Figure B-9 Enter Password ................................................................................................................................................................ 60

Figure B-10 Wrong Password Prompt ............................................................................................................................................... 61

Figure B-11 Sensor Summary ............................................................................................................................................................ 61

Figure B-12 Sensor Type ................................................................................................................................................................... 61

Figure B-13 Sensor Alarm Level ........................................................................................................................................................ 62

Figure B-14 Sensor Warning Level .................................................................................................................................................... 62

Figure B-15 Sensor Range ................................................................................................................................................................. 62

Figure B-16 Relay Summary .............................................................................................................................................................. 62

Figure B-17 Relay Mode .................................................................................................................................................................... 62

Figure B-18 Turn on Delay ................................................................................................................................................................ 62

Figure B-19 Minimum on Time ......................................................................................................................................................... 63

Figure B-20 Zone Controls ................................................................................................................................................................ 63

Figure B-21 Zone Controls ................................................................................................................................................................ 63

Figure B-22 Sensor Selection ............................................................................................................................................................ 64

Figure B-23 Rising Trip Point Entry ................................................................................................................................................... 64

Table B-2 Default Raising trip points ................................................................................................................................................ 64

Figure B-24 Falling Trip Point Entry .................................................................................................................................................. 64

Figure B-25 Sensor Mode Selection .................................................................................................................................................. 64

Figure B-26 Alarm Signals ................................................................................................................................................................. 65

Figure B-27 Buzzer Alarm Signal ....................................................................................................................................................... 65

Figure B-28 Horn Warning Signal ...................................................................................................................................................... 65

Figure B-29 Buzzer Trouble Signal .................................................................................................................................................... 65

REV – 2.2.1 [34-8708-4770-6 ] 55 | Page

8 Appendix B – Quick Setup

IMPORTANT: To properly and effectively program the system you must configure the Sensors, Relays, Zones, and Signals. If the
user has not entered any parameters, the system WILL NOT be monitoring the sensors or controlling the ventilation system. The
relays will be in the not actuated state and the horn and strobe outputs will be off. Be sure that the 4-20mA output on each
sensor is set to “On”.

1. Configure System allows the installer to set the time of day, the day of the week, load the default configuration,
configure custom sensors and change the password.

2. Configure Sensors defines the Sensor type – CO, NO
Alarm Level, Warning Level, and Sensor Range.

3. Configure Relays, Horn and Strobe defines operation as Normally Off or On, Delay Time, Minimum Runtime – this
applies to all three relays as well as the horn and strobe.

Note: The Delay Time default is 1 minute. If the duration of a test procedure or gas exposure is less than 1 minute, the
relays, horns, and strobes may not engage even though the DVP-120M display and the sensors respond. When testing the
system disable the delay (set Delay Time to zero minutes/seconds).

4. Configure Zones defines Sensor Input & Relay/Alarm Output and sets up the sensor Groups (set of sensors of the same
type and output within the same zone) - Sensor type, Sensor Number, Rising Trip point and Falling Trip point

5. Configure Signals defines the output of the Alarm, Warning and Trouble Signals (Buzzer, Horn and Strobe) as On, Off,
Intermittent, Continuous, etc.

Note 1: The default Password is 1234. If the password has been changed and/or lost:

, EX, NH3, H2S, REF, CO2, O2, Custom (wildcard) or None and sets

2

• Power down the unit. Remove the Jumper Shorting Connector from the EXT header and place it on the top two

pins of the SYS header.

• Power up the DVP-120. The first display is the current password on the unit.

• Power down the unit. Remove the Jumper Shorting Connector from the SYS header and place it back onto the two

bottom pins of the EXT header.
Note 2: When entering multiple digit values the Up arrow (↑) acts as an enter key and it is not necessary to enter all
allowed fields. Any other key is ignored or cancels the current parameter change.

Note 3: The MENU key will cause the system to shift to the Configuration Menu. The up and down and left and right arrow
keys will scroll through all configuration parameters.

Default Configuration:

• Password 1234

• Sensors Undefined

• Alarm signals Buzzer = Intermittent, Horn = Intermittent, Strobe = Continuous

• Warning signals Buzzer = Off, Horn = Off, Strobe = Off

• Trouble signals Buzzer = Triple Tap, Horn = Off, Strobe = Off

• Relay 1 Normally off, 1-minute turn on delay, 1 minute minimum on time

• Relay 2 Normally off, 1-minute turn on delay, 1 minute minimum on time

• Relay 3 Normally off, 1-minute turn on delay, 1 minute minimum on time

• Horn Normally off, 1-minute turn on delay, 0 (zero) minimum on time

• Strobe Normally off, 1-minute turn on delay, 0 (zero) minimum on time

• Zone1 Controls R1

• Zone2 Controls R2

• Zone3 Controls R3

• Group 1 Type 1 CO, Voting mode, Quorum = 1

• Group 2 Type 2 NO

, Voting mode, Quorum = 1

2

REV – 2.2.1 [34-8708-4770-6 ] 56 | Page

Description

Carbon
Monoxide

Nitrogen
Dioxide

Combustible
Gas

Ammonia

Hydrogen
Sulfide

Refrigerants

Carbon
Dioxide
(CD-6H, CD­6MC)

Oxygen

Carbon
Dioxide
(CD-6G)

Type

CO

NO2

EX

NH3

H2S

REF

CO2

O2

CO2

Range

200 ppm

20 ppm

50% LEL

100 ppm

50 ppm

1,000

ppm

5,000

ppm

25% v/v

5.00%
vol

Alarm Level

200 ppm

5 ppm

20% LEL

75 ppm

20 ppm

300 ppm

4,000

ppm

19.5%
v/v

0.50%
vol

Warning
Level

100 ppm

3 ppm

15% LEL

50 ppm

14 ppm

200 ppm

1,500

ppm

20.0%
v/v

0.15%
vol

Rising Level

35 ppm

2.5

ppm

10% LEL

25 ppm

8 ppm

100 ppm

1,000

ppm

20.3%
v/v

0.10%
vol

Falling Level

15 ppm

1.2

ppm

5% LEL

10 ppm

3 ppm

50 ppm

800 ppm

20.6%
v/v

0.08%
vol

• Group 3 Type 3 EX, Voting mode, Quorum = 1

• Group 4 Type 4 NH

• Group 5 Type 5 H

, Voting mode, Quorum = 1

3

S, Voting mode, Quorum = 1

2

• Group 6 Type 6 REF, Voting mode, Quorum = 1

• Group 7 currently unused

• Group 8 Type 8 O

• Group 9 Type 9 CO

• Group 10 Type 10 CO

, Voting mode, Quorum = 1

2

, Voting mode, Quorum = 1

2

, Voting mode, Quorum = 1

2

Table B-1 Default settings

Typical coverage for CO, and NO

sensors is 5,000 sq. ft. (464.5 sq. m) (see the User Instructions for each sensor type for location

2

and coverage details). Extra sensors may be needed near areas where people work, such as toll booths. Macurco provides only
the control panels and sensors. Fans, relays, and other devices are provided by the contractor. See the appropriate building
code for the size of fans and air changes per unit of time.

REV – 2.2.1 [34-8708-4770-6 ] 57 | Page

5 S E N S O R S F O U N D 3 R E L A Y S F O U N D

Figure B-1 System Wiring Diagram

Setting the System Configuration

The configuration menus can be entered from normal mode by pressing the MENU key. While in configuration mode, the user
can review all configuration parameters to check the current operating conditions.

Figure B-2 Hardware Summary

The MENU key is also used to return to a higher-level menu, exit the configuration menus and finally return to normal mode.

Figure B-3 Keypad Layout

REV – 2.2.1 [34-8708-4770-6 ] 58 | Page

S a v e C o n f i g . ? ( 0 = N O , 1 = Y E S )

T i m e : 2 2 : 5 5 D a y : T u e s d a y

When exiting from the menu system to normal mode, if any configuration changes have been made, the panel will ask whether
changes are to be saved.

Figure B-4 Save Configuration Prompt

Pressing the zero (0) key at this point will cancel all changes except time and day of the week. Pressing the one (1) key will save
all changes to memory, and the changes will then become immediately effective in controlling the ventilation system.

The numeric keys are used to change the particular parameter displayed. The underlined numeral, or space, on each display,
indicates what will be changed by the numeric keys. The left and right arrow keys will enter the particular submenu and scroll
through the items of the same type where appropriate, (e.g., enter the Configure Sensors submenu) and scroll through the
parameter lists for the existing sensors. The up-arrow key scrolls through the menu entries in the order listed here, while the
down arrow key scrolls in the reverse order.

Changing the configuration parameters requires the entry of a password before changes can be made. The default password is

1234.

In many cases, the parameter is entered as a string of numerals, but some parameters are selected by pressing a single key, e.g.
pressing 1 selects Monday, 2 selects Tuesday, etc.

8.1 Configure System Submenu

8.1.1 Set Time of Day

The system configuration submenu provides entries to:

1. Set the time of day, 24-hour format

2. Set the day of the week, day 1 is Monday

3. Load Default Configuration

4. Change Password

Figure B-5 Set Time of Day

This display example shows that the time is 22:55 (10:55 PM). The underlined numerals indicate that the numeric keys can be
used to set the current time of day. When the first numeral is entered (and after the password is entered if required), the
display will change to show that the hour portion of the time is currently being entered.

Note that the time is saved as soon as the fourth numeral is entered.

REV – 2.2.1 [34-8708-4770-6 ] 59 | Page

T i m e : 2 2 : 5 5 D a y : 2 T u e s d a y

1 L o a d D e f a u l t C o n f I g u r a t i o n

C h a n g e P a s s w o r d * * * *

E n t e r P a s s w o r d _ _ _ _

8.1.2 Set Day of Week

Figure B-6 Set Day of the Week

This display example shows that Tuesday is the current day of the week. The underlined numeral indicates that the day can be
changed by entering the corresponding numeral: 1 Monday, 2 Tuesday, 3 Wednesday, 4 Thursday, 5 Friday, 6 Saturday, 7
Sunday

8.1.3 Load Default Configuration

Figure B-7 Load Default Configuration

When the one (1) numeral is pressed, the panel will prompt for the password, even if it has been entered previously. If the
password is entered correctly, the panel will overwrite the existing configuration with the default configuration. This operation
is intended to restore the panel to a known basic condition if it is removed from one installation and installed in another.

8.1.4 Change Password

Figure B-8 Change Password

When the first digit is entered to change the password, the panel will prompt for the existing password to be entered (if it hasn’t
already been entered), see section 9.1.5 Enter Password

Once the current password has been entered, the panel will prompt for the new password.

for more detail.

8.1.5 Enter Password

If the password has not yet been entered, then when the first digit of any parameter is entered the panel will prompt for the
current password. Note that the first digit entered is discarded; it does not count toward the password or toward the parameter
entry.

Figure B-9 Enter Password

If the password is not entered correctly the panel will display as follows:

REV – 2.2.1 [34-8708-4770-6 ] 60 | Page

W r o n g P a s s w o r d

S e n s o R 0 1 C O A : 2 0 0 W : 5 0

S e n s o r 0 1 C O T y p e : 1

S e n s o r 0 1 C O A l a r m : 2 0 0 p p

m

Figure B-10 Wrong Password Prompt

Once the current password has been entered, the panel will prompt for the configuration parameter being changed.

If the password has been lost:

→ Power down the DVP-120M
→ Remove the Jumper Shorting Connector from the EXT header and place the Jumper Shorting Connector onto the top

two pins of the SYS header.

→ Power up the DVP-120. The first display is the current password on the unit.
→ Remove the Jumper Shorting Connector from the SYS header and install back onto the two bottom pins of the EXT

header.

8.2 Configure Sensors Submenu

8.2.1 See section 4.2 Initial Operating Mode for more detail

8.2.2 See section 4.3 User Interface for more detail

8.2.3 See section 4.13 System Configuration for more detail

8.2.4 See section 4.13.3 Configure Sensors Submenu for more detail

Press Menu to display Hardware Summary

↑ x 2 Configure Sensors

• Sensor

Figure B-11 Sensor Summary

↑ Sensor type (set sensor type)

1=CO, 2=NO

↑ Alarm Level - set level if needed, 0 = disable

, 3=EX, 4=NH3, 5=H2S, 6=REF, 7=unused, 8=O2, 9=CO2 and 0=None

2

Figure B-12 Sensor Type

REV – 2.2.1 [34-8708-4770-6 ] 61 | Page

S e n s o r 0 1 C O W a r n i n G : _ 5 0 p p

m

S e n s o r 0 1 C O R a n g e : 2 0 0 p p

m

R e l a y 1 N o r m . O f f D e l a y O N , M i n . O n

R e l a y 1 N o r m . O f f M o d e : 2

R e l a y 1 D e l a y O n ( m m : s s ) 0 1 : 0 0

↑ Warning Level - set level if needed

↑ Sensor Range - default range is in system

↑ Next Sensor - complete for all sensor channels

Figure B-13 Sensor Alarm Level

Figure B-14 Sensor Warning Level

Figure B-15 Sensor Range

8.3 Configure Relays, Horn & Strobe Submenu

8.3.1 See section 4.13.4 Configure Relays, Horn & Strobe Submenu for more detail

Press Menu to display Hardware Summary

↑ x 3 Configure Relays
→ Relay 1

Figure B-16 Relay Summary

Default – Normally Off

Figure B-17 Relay Mode

Default - Delay – 1 Minute

Figure B-18 Turn on Delay

REV – 2.2.1 [34-8708-4770-6 ] 62 | Page

R e l a y 1 M i n . O n ( m m : s s ) 0 1 : 0 0

Z o n e 1 C o n t r o l s R 1 R 2 R 3 H 4 S 5

Z 1 G r o u p 1 N O 2 S e n s o r T y p e : 2

Z 1 G r o u p 1 N O 2 S e n s o r s : 0 2 , 0 4 , 1

1

Default - Minimum Runtime - 1 Minute

Figure B-19 Minimum on Time

→ Relay 2 - repeat for all relays, horn, and strobe

8.4 Configure Zones Submenu

8.4.1 See section 4.13.7 Configure Zones Submenu for more detail

Definitions:

Zone – Defines Sensor Input & Relay / Alarm Output
Group – Set of Sensors of the same type and output within the same zone
Average – Activation based upon an average of sensors in a group
Voting – Number of sensors needed to be above trip point to activate the output
Quorum – Number of sensors need to vote, 1 = any sensor

Press Menu to display Hardware Summary

↑ x 4 Configure Zones
→ Zone 1 Controls

R_ R_ R_ H_ S_
Enter (underlined) number of output for zone
R = Relay (1, 2 and 3), H = Horn (4), S = Strobe (5)

↑ Configure Group 1
Sensor type - enter #
1=CO, 2=NO

, 3=Combustible, 0=None

2

Figure B-20 Zone Controls

Figure B-21 Zone Controls

↑ Sensor Number - enter a two-digit number for each sensor to be included in the group (e.g., 01, 02, 03…12.) from 01 through

12.

REV – 2.2.1 [34-8708-4770-6 ] 63 | Page

Z 1 G r o u p 1 N O 2 R i s i n g : 2 . 5 p p

m

Description

Carbon

Monoxide

Nitrogen

Dioxide

Combustible

Gas

Ammonia

Hydrogen

Sulfide

Refrigerants

Carbon Dioxide

(CD-6H, CD-6MC)

Oxygen

Carbon

Dioxide

(CD-6G)

Type

CO

NO2

EX

NH3

H2S

REF

CO2

O2

CO2

Rising Level

35 ppm

2.5 ppm

10% LEL

25 ppm

8 ppm

100 ppm

1,000 ppm

20.3%
v/v

0.10%
vol

Z 1 G r o u p 1 N O 2 F a l l i n g : 1 . 0 p p

m

Z 1 G r o u p 1 N O 2 M o d e : 2 V o t i n g

↑ Rising (activation) Trip point

The default rising trip points are:

Figure B-22 Sensor Selection

Figure B-23 Rising Trip Point Entry

Table B-2 Default Raising trip points

↑ Falling (off) Trip point

Figure B-24 Falling Trip Point Entry

↑ Average or Voting Mode

Figure B-25 Sensor Mode Selection

→ Configure Group 2 - repeat for up to three groups

When multiple sensors are being monitored as a Group, the DVP-120 output can be based on either sensor Voting (default) or
the Average of all sensor readings in the Group.

When the configuration is Average, the gas concentrations from all sensors in the Group are averaged.

• If the average is greater than or equal to the rising trip point, the zone outputs are activated.

• If the average is less than or equal to the falling trip point, the zone output(s) is de-activated.

• If the average is between the two trip points, the outputs remain in their previous state.
When the configuration is Voting, the number of sensors in the Group indicating a value greater than or equal to the rising trip
point is counted.

• If the count is greater than or equal to the Quorum (the minimum number of sensors votes in a Group needed)

then the zone output(s) are activated.

REV – 2.2.1 [34-8708-4770-6 ] 64 | Page

A l a r m S i g n a l s B u z z , H o r n , S t r o b

e

A l a r m S i g n a l s B u z z : 2 I n t e r m i t

.

W a r n i n g S i g n a l s H o r n : 5 O F

F

T r o u b l e S i g n a l s B u z z : 4 T r i p l

e

• If the count of sensors indicating less than or equal to the falling trip point is greater than or equal to the Quorum

the zone output(s) is de-activated.

• If a group has an equal number of sensors with gas readings greater than or equal the rising trip point and sensors

with readings less than or equal to the falling trip point, activating the output(s) is given priority.
It is up to the installer to ensure that the Quorum entry is appropriate for the configuration. Valid entries are from one to
twelve, but a value greater than the number of sensors being monitored by the group stops the group from controlling the
outputs. The default Quorum value is 1; in this case, only 1 sensor vote is needed to control the output.

8.5 Configure Signals Submenu

8.5.1 See section 4.13.8 Configure Signals Submenu for more detail

Press Menu to display Hardware Summary

↑ x5 Configure Signals
→Alarm Signals

Figure B-26 Alarm Signals

↑ Alarm Signal Buzzer (default 2 – Intermittent)
↑ Alarm Signal Horn (default 2 – Intermittent)
↑ Alarm Signal Strobe (default 1 – Continuous)

↑ Warning Signals

↑ Warn Signal Buzzer (default 5 – Off)
↑ Warn Signal Horn (default 5 – Off)
↑ Warn Signal Strobe (default 5 – Off)

→Trouble Signals

Figure B-27 Buzzer Alarm Signal

Figure B-28 Horn Warning Signal

Figure B-29 Buzzer Trouble Signal

↑ Trouble Signal Buzzer (default 4 – Triple Tap)
↑ Trouble Signal Horn (default 5 – Off)
↑Trouble Signal Strobe (default 5 – Off)

REV – 2.2.1 [34-8708-4770-6 ] 65 | Page

Product Model

Replacement Part

Part Number

DVP-120 All Models

DVP-120 Replacement Power Supply Assembly

70-2900-0017-0

DVP-120 All Models

DVP-120 Replacement Buzzer

70-2900-0017-1

DVP-120 All Models*

DVP-120 Replacement Lock/Keys

70-2900-0017-6

DVP-120

DVP-120 Replacement Board

70-2900-0017-2

DVP-120M

DVP-120M Replacement Board

70-2900-0017-5

DVP-120B

DVP-120B Replacement Board

70-2900-0017-3

DVP-120C

DVP-120C Replacement Board

70-2900-0017-4

DVP-1200

DVP-1200 Replacement Board

70-2900-0017-7

9 Appendix C – Replacement Parts

The table below lists replaceable parts for the DVP Control Panels, parts not listed such as the keypad can only be replaced at
the factory.

CAUTION: Certification on all DVP Panels is based on testing of the complete assembly. Replacing any part in the DVP Assembly
voids the certification and user must remove the ETL label applied on the panel.

*Replacement Lock/Key is for DVP-120, DVP-120M, DVP-120B, and DVP-120C. Lock assembly on the DVP-1200 is part of the
housing and is not replaceable.

REV – 2.2.1 [34-8708-4770-6 ] 66 | Page

Modbus
Address

Detector
Type

Location

Modbus
Address

Detector
Type

Location

Modbus
Address

Detector
Type

Location

1

34

67 2 35

68 3 36

69 4 37

70 5 38

71 6 39

72 7 40

73 8 41

74 9 42

75

10

43

76

11

44

77

12

45

78

13

46

79

14

47

80

15

48

81

16

49

82

17

50

83

18

51

84

19

52

85

20

53

86

21

54

87

22

55

88

23

56

89

24

57

90

25

58

91

26

59

92

27

60

93

28

61

94

29

62

95

30

63

96

31

64

97

32

65

98

33

66

99

10 Appendix D – Setup Record

Record network parameters and keep in a safe place to assist with installation and future troubleshooting will be simplified.

Date of Install: _______________________________

Location of Install: ____________________________

Serial Number: _______________________________

Installed by: _________________________________

Detectors / Sensors

Under Detector type record gas type (e.g. CM-6, TX-6-ND, OX-12) Note that CX-6 uses two addresses, one for each gas type.

REV – 2.2.1 [34-8708-4770-6 ] 67 | Page

Relay connection

Connected device

Zone Configured

Delay

Runtime

Relay 1

Relay 2

Relay 3

Horn 4

Strobe 5

Notes:

REV – 2.2.1 [34-8708-4770-6 ] 68 | Page

11 Appendix E – DVP-120 Quick Start Guide

REV – 2.2.1 [34-8708-4770-6 ] 69 | Page

12 Macurco Gas Detection Product limited warranty

Macurco warrants the DVP-120B gas detector will be free from defective materials and workmanship for a period of two (2) years
from the date of manufacture (indicated on inside cover of the DVP-120), provided it is maintained and used in accordance with
Macurco instructions and/or recommendations. If any component becomes defective during the warranty period, it will be
replaced or repaired free of charge, if the unit is returned in accordance with the instructions below. This warranty does not apply
to units that have been altered or had repair attempted, or that have been subjected to abuse, accidental or otherwise. The above
warranty is in lieu of all other express warranties, obligations or liabilities. THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR PARTICULAR PURPOSE ARE LIMITED TO A PERIOD OF TWO (2) YEARS FROM THE PURCHASE DATE. Macurco shall not
be liable for any incidental or consequential damages for breach of this or any other warranty, express or implied, arising out of
or related to the use of said gas detector. The manufacturer or its agent’s liability shall be limited to replacement or repair as set
forth above. Buyer’s sole and exclusive remedies are the return of the goods and repayment of the price, or repair and
replacement of non-conforming goods or parts.

*Modbus is a trademark or registered trademark of Schneider Automation Inc.
*BACnet is a registered trademark of ASHRAE.

Macurco Inc.

1504 W 51st St.
Sioux Falls, SD 57105

Technical Support Contact Information

General Contact Information

Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.macurco.com/support/

REV – 2.2.1
Issue Date: 1.18.2023
Document No: 34-8708-4770-6
© Macurco 2023. All rights reserved.

Phone : [phone]
Fax : [phone]
Email: [e-mail]
Website: www.macurco.com

REV – 2.2.1 [34-8708-4770-6 ] 70 | Page