Detcon RD-8X User Manual

Model RD-8X

Remote Display Unit

Model RD-8X-N4X

Remote Display

ALM1 ALM2 ALM3 FAULT

PROG ENTER

RESET/ACK

Operator’s Installation and Instruction Manual

The Woodlands, Texas 77387

Ph.281.367.4100 / Fax [phone]

November 25, 2009 • Document # 3434 • Revision 1.0

DETCON, Inc.

3200 Research Forest Dr.,

www.detcon.com

RD-8X-N4X Operators Manual

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Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

one: 888.367.4286, 281.367.4100 • Fax: [phone] • www.detcon.com

Ph

Model RD-8X-N4X Operator Manual Rev. 1.0 ii

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

• [e-mail]

RD-8X-N4X Operators Manual

Table of Contents

Description..............................................................................................................................................1

1.

2. Specifications..........................................................................................................................................1

3. Installation..............................................................................................................................................1

3.1 Mounting and Cable Penetrations................................................................................................................... 1

3.2 Power and I/O Connections............................................................................................................................ 2

3.2.1 AC Power.................................................................................................................................2

3.2.2 DC Power ................................................................................................................................2

3.2.3 Serial Input Connection...........................................................................................................2

3.2.4 Relay Outputs...........................................................................................................................4

3.3 Start-up ........................................................................................................................................................... 4

4. System Operation...................................................................................................................................4

4.1 Front Panel ..................................................................................................................................................... 4

4.2 Unit Setup Main Menu ................................................................................................................................... 5

4.2.1 Set Number of Channels ..........................................................................................................5

4.2.2 Setup Channel Data.................................................................................................................6

4.2.3 Calibration Mode.....................................................................................................................7

4.3 Remote Display Setup .................................................................................................................................... 7

4.4 Display Contrast........................................................................................................................................... 10

4.5 Reset Switch................................................................................................................................................. 10

5. Modbus Communications ...................................................................................................................10

6. Warranty ..............................................................................................................................................11

Appendix A................................................................................................................................................... 12

Revision History........................................................................................................................................................ 12

Appendix B...................................................................................................................................................13

Drawings and Diagrams ............................................................................................................................................ 13

Table of Figures

Figure 1 Dimensional Overview...................................................................................................................... 2

Figure 2 Wiring Diagram.................................................................................................................................3

Figure 3 Controller PCB Connections.............................................................................................................3

Figure 4 Front Panel ........................................................................................................................................5

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Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

Phone: [phone] • Fax: [phone] • Hwww.detcon.com

Model RD-8X-N4X Operator Manual Rev. 1.0 iv

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

H • [e-mail]

RD-8X-N4X Operators Manual

1. Description

The Model RD-8X is a read only remote display unit designed to operate with Modbus™ RS485 sensors or
control systems from Detcon. The unit displays real time channel information on the backlit LCD. Display
information includes the channel number, the gas type, and the gas concentration. The unit will also
display the current Alarm/Fault status via the front panel LED indicators.

Housed in a NEMA 4 water proof enclosure, the Model RD-8X has a built in power supply, providing
multiple power options. 115/230VAC 50/60Hz or 11.5-30VDC can provide power to the unit.

2. Specifications

Capacity

16 Input Channels

Sensor Inputs

Accuracy

Outputs

Electrical

Power Input

Power Consumption

Display

Electrical Classification

Dimensions

Physical

Operating Temperature Range

Warranty

3. Installation

RS-485 Modbus RTU From Control Systems

± 1% Full Scale Range

Qty 4 Relays: 1 Form C Contacts per relay
Rated for 5A @ 30VDC, 5A @ 250VAC
RS-485 Modbus™ Slave

115-230VAC 50/60Hz

11.5-30VDC

Nominal: 1 Watts @ 24VDC
Maximum: 2 Watts @ 24VDC

1”x5” Backlit LCD

NEMA 4X

15-3/8”W x 12-3/8”H x 8-1/2”D

-40F to +167F

-40C to +75C

One year

3.1 Mounting and Cable Penetrations

Securely mount the Model RD-8X enclosure per the mounting dimensions provided in Figure 1.

NOTE: AC power should be kept separate from DC power and signals within conduit runs.

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RESET

Model RD-8X-N4X

Remote Display

9.85"8.95"

ON/OFF

8"

11.75"
Mounting Flange

Mounting Flange

6.45"

6.85"

Figure 1 Dimensional Overview

3.2 Power and I/O Connections

Power and I/O connections are made on back of the PCB. Plug-in male connectors are provided for input
wiring terminations. This connector style provides for quick disconnect convenience during replacement or
servicing (refer to Figure 3).

3.2.1 AC Power

Connect the 115 or 230VAC input wiring to the terminals at P1labeled “VAC IN” (refer to Figure 3).

3.2.2 DC Power

For optional DC power input, connect 11.5-30VDC to the terminals at P2, labeled “VDC IN” (refer to
Figure 3). This input can be used for primary power or back-up power in the event of a VAC power
failure.

3.2.3 Serial Input Connection

The serial RS-485 connection to sensors or control systems should be terminated at P4 Labeled “COM2”
the RS-485 Master port of the remote display (refer to Figure 3).

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Power Switch

12

SW2

34

FAULT ALARM3 ALARM2 ALARM1

NC NO NC NO NC NO

NC NO

P9 P8 P7 P6

CONTROLLER PCA

RESET

P5

Yel 18AWG

Yel 18AWG

Figure 2 Wiring Diagram

P10

P1

P11

P2

P5

P5

RESET SWITCH

SW1

12

ACV IN

VDC IN

COM 1COM 2

Ground
Neutral (L2)
120VAC (L1)

VDC - (Return)
VDC + (11.5~30VDC)

Customer

Supplied

Wiring

RS-485 Shield
RS-485 - B
RS-485 - A

Customer

Supplied

Wiring

E

L2

L1

+

S

B

A

S

B

A

Figure 3 Controller PCB Connections

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3.2.4 Relay Outputs

The Model RD-8X provides four single pole double throw (SPDT) Form C contact relays. The relay
terminals (P6 through P9) are labeled “FAULT”, “ALM3”, “ALM2”, and “ALM1” (refer to Figure 3). The
relays can be used to control annunciating devices or as signal input/outputs to other control devices.
Connections are labeled COM (common), NO (normally open) and NC (normally closed). The current
ratings of the relay contacts are 5A @ 30VDC, and 5A @ 250VAC, these ratings should not be exceeded.

Note: ALM3 is not used when the unit is used with the 10B control units.

3.3 Start-up

The power switch is located on the outside of the enclosure, on the right side of the unit, and is marked as
“ON” and “OFF”. To apply power to the unit, turn the switch to the “ON” position.

NOTE: Before applying power, check to make sure that all the wiring connections and external
devices are installed correctly.

NOTE: Applying power with devices hooked up incorrectly may cause damage to the equipment.

When power is applied to the unit, the unit will display the firmware revision and properties for several
seconds. For this controller that information should be:

DETCON INC COM 1 MODBUS SLAVE
MODBUS CONTROLLER
VERSION XX.XXX COM 2 MODBUS MASTER
PCWH X.XXX

After unit initialization, the unit will begin normal operation. If the unit has been properly setup, the unit
will display the current status of the devices that it is connected to.

4. System Operation

4.1 Front Panel

The Main Display is a 1¼”x 6” backlit LCD that has 4 lines by 40 characters. In normal operation the
channel’s information will be shown as “01> XXXX ppm GAS” will be displayed. If any channel is in
any gas alarm condition, “01> XXXX IN ALARM ” will be displayed. If any gas channels are in Fault,
they will display “01> XXXX IN FAULT ”. If any channels are not communicating with their
appropriate 12B controller, then they will display as “01> XXXX COMM ERROR ”.

Four LED indicators on the front panel show alarm and fault relay status. The LED’s represent ALM 1
(yellow), ALM 2 (amber), ALM 3 (red) and FAULT (blue) and are labeled respectively.

The RD-8X user interface consists of four function keys on the front panel. These keys are labeled:
“PROG”, “u” (Up Arrow), “v” (Down Arrow), and “ENTER”. The “ENTER” key doubles as a
“RESET/ACK” key, but “RESET/ACK” has no functionality in this firmware revision.

NOTE: The Remote Display automatically times out of Menu Mode and returns to the Main
Display after 15 seconds of inactivity. While in Menu Mode, there are no updates to gas readings.

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Model RD-8X-N4X

Remote Display

ALM1 ALM2

PROG ENTER

ALM3 FAULT

RESET/ACK

Figure 4 Front Panel

4.2 Unit Setup Main Menu

Unit Setup is accomplished by use of the Main Menu. The Main Menu consists of 3 items:

SET # OF CHANNELS
SETUP CHANNEL DATA
CALIBRATION MODE

The “PROG” key is used to enter the menu mode of the unit. Upon entering the Main Menu the LCD will
display:

MAIN MENU
SET # OF CHANNELS

Use the “v” (Down Arrow) key to move to the next menu item, or use the “u” (Up Arrow) key to move to
the previous menu item. Pressing the “PROG” key again will return the unit to normal operation. When
the appropriate Menu Item is found, the “ENTER” Key is used to enter that menu item.

NOTE: The Remote Display automatically times out of Menu Mode and returns to the Main
Display after 15 seconds of inactivity. While in Menu Mode, there are no updates to gas readings.

4.2.1 Set Number of Channels

The “SET # OF CHANNELS” menu item allows setting the number of active channels to be monitored.
The number of active channels should match the number of sensors being connected and should not exceed
the input capacity of 16 channels.

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NOTE: the number of activated channels can be less than (but not greater than) the controller’s

maximum input capacity. The maximum input capacity is 16 channels.

To enter the “SET # OF CHANNELS” Menu, press the “PROG” key to enter the Main Menu. From the
Main Menu, press the “ENTER” key to enter the “SET # OF CHANNELS” item. Use the “u” (Up Arrow)
to increase the number of channels, and the “v” (Down Arrow) to decrease the number of channels to be
monitored. When the appropriate number of channels is selected, press the “ENTER” key to accept the
number. Press the “PROG” key to exit the Main Manu, or press the “v” (Down Arrow) key to move to the
next menu item.

4.2.2 Setup Channel Data

This menu entry allows the setup of parameters necessary for monitoring each device. The parameters set
for each channel should match those of the device that the channel is monitoring.

To enter the “SET CHANNEL DATA” Menu, press the “PROG” key to enter the Main Menu. From the
Main Menu, press the “v” (Down Arrow) key to move to the “SET CHANNEL DATA menu item, and
press the “ENTER” key to enter the menu item.

Upon entering “SET CHANNEL DATA”, the user is presented with the following set of parameters:

SLAVE ID (Slave ID Number):

Hexadecimal number assigned to the sensor. This number is adjustable from 01 to 7F hex, and should
match the appropriate device.

REGS TO READ (Registers to read):

This is pre-programmed to the value of 6 and should not be altered unless directed to do so by Detcon
Factory Personnel.

READING REG (Reading Register):

This is pre-programmed to the value of 2 and should not be altered unless directed to do so by Detcon
Factory Personnel.

DECIMAL POINT:

Set to match the sensor display format.

RANGE:

Set the Range to match the sensor full-scale range of the sensor.

TYPE:

Set the type to match the Gas Type of the sensor.

The “TYPE” parameter is an alphanumeric display of 10 characters that can be changed by use of the
“Arrow” keys (“u”,“v”). When the appropriate alphanumeric character is found press the “ENTER” key to
accept that character, and move to the next character position. When all ten characters have been selected
(including spaces) the display will return to the Blinking Cursor.

RTO (Response Time Out):

This is pre-programmed to the value of 500 and should not be altered unless directed to do so by Detcon
Factory Personnel.

IPD (Interpoll Delay):

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This is pre-programmed to the value of 50 and should not be altered unless directed to do so by Detcon
Factory Personnel.

Use the “u” (Up Arrow) and “v” (Down Arrow) keys to move from one parameter to another. When the
Blinking Cursor is positioned at the parameter that needs to be modified, the “ENTER” key is used to open
that parameter to change. Use the “u” (Up Arrow) and the “v” (Down Arrow) keys to change the
parameter to the desired value, and press the “ENTER” key to accept that value.

NOTE: The “TYPE” parameter is an alphanumeric display of 10 characters that can be changed
by use of the “Arrow” keys (“u”,“v”). When the appropriate alphanumeric character is found the
“ENTER” key is used to accept that character, and move to the next character. Once all ten
characters have been selected (including spaces or blank characters) the display will return to the
Blinking Cursor.

When the Blinking Cursor is at the end of a set of parameters for one channel, the “Down Arrow” key will
move the Blinking Cursor to the next channel’s set of parameters.

Press the “PROG” key to exit the “SET CHANNEL DATA” menu and return to the Main Manu, press the
“PROG” key again to exit the Main Menu or press the “v” (Down Arrow) key to move to the next menu
item, or the “u” (Up Arrow) to move to the previous menu item.

4.2.3 Calibration Mode

“CALIBRATION MODE” disables all alarms until the calibration mode is exited.

To enter the “CALIBRATION MODE” Menu item, press the “PROG” key to enter the Main Menu. From
the Main Menu, press the “v” (Down Arrow) key until the display shows “CALIBRATION MODE”.
Press the ENTER” key to enter calibration mode.

The relays and alarm LED’s will remain disabled until the “ENTER” key is pressed again,
“CALIBRATION MODE” is exited, and the unit returns to normal operation.

NOTE: The RD-8X does not poll sensors or control systems while in Menu Mode, so there are no
updates to gas readings or alarms.

Press the “PROG” key to exit the Main Manu, or press the “u” (Up Arrow) key to move to the previous
menu item.

4.3 Remote Display Setup

In order for the model RD-8X to communicate with other Detcon devices, certain channel parameters must
be configured. The following tables below give the needed channel setup parameters for the model RD­8X.

4.3.1 Model RD-8X to Model 1600A or RD-8X

Table 1

RD-8X: Setup Channel Data Model 1600A / RD-8X

Channel Slave ID Register to Read Reading Register Channel

1 ** 16 0 1
2 ** 16 1 2

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3 ** 16 2 3
4 ** 16 3 4
5 ** 16 4 5
6 ** 16 5 6
7 ** 16 6 7
8 ** 16 7 8

9 ** 16 8 9
10 ** 16 9 10
11 ** 16 10 11
12 ** 16 11 12
13 ** 16 12 13
14 ** 16 13 14
15 ** 16 14 15
16 ** 16 15 16

**- Represent the modbus address of the remote device. The slave ID for each channel enabled on the RD-

8X must match the modbus address of the remote device. Failure to assign the proper slave ID will result
in a “COMM ERROR” for the corresponding channel.

NOTE: The number of activated channels can be less than (but not greater than) the controller’s
maximum input capacity. The maximum input capacity is 16 channels.

4.3.2 Model RD-8X to Model 10X / 12X

Table 2

RD-8X: Setup Channel Data Model 10X / 12 X

Channel Slave ID Register to Read Reading Register Channel

* ** 6 1 1

* - Represents RD-8X channel the remote device will be assigned to.

** - Represents the modbus address of the remote device. The slave ID for each channel enabled on the
RD-8X must match the modbus address of the remote device. Failure to assign the proper slave ID will
result in a “COMM ERROR” for the corresponding channel.

NOTE: The number of activated channels can be less than (but not greater than) the controller’s
maximum input capacity. The maximum input capacity is 16 channels.

4.3.3 Model RD-8X to Model 140

Table 3

RD-8X: Setup Channel Data

Model 140

Channel Slave ID Register to Read Reading Register Channel

* ** 7 0 ***

* - Represents RD-8X channel the remote device will be assigned to.

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** - Represents the modbus address of the remote device. The slave ID for each channel enabled on the
RD-8X must match the modbus address of the remote device. Failure to assign the proper slave ID will
result in a “COMM ERROR” for the corresponding channel.

NOTE: The number of activated channels can be less than (but not greater than) the controller’s
maximum input capacity. The maximum input capacity is 16 channels.

*** - Represents model 140 channel that will be assigned to a RD-8X channel.

4.3.4 Model RD-8X to Model 240

Table 4

RD-8X: Setup Channel Data

Model 240

Channel Slave ID Register to Read Reading Register Channel

* ** 7 0 ***
* ** 7 1 ***

* - Represents RD-8X channel the remote device will be assigned to.

** - Represents the modbus address of the remote device. The slave ID for each channel enabled on the
RD-8X must match the modbus address of the remote device. Failure to assign the proper slave ID will
result in a “COMM ERROR” for the corresponding channel.

NOTE: The number of activated channels can be less than (but not greater than) the controller’s
maximum input capacity. The maximum input capacity is 16 channels.

*** - Represents model 240 channels that will be assigned to a RD-8X channel.

4.3.5 Model RD-8X to Model 440

Table 5

RD-8X: Setup Channel Data

Model 440

Channel Slave ID Register to Read Reading Register Channel

* ** 9 0 ***
* ** 9 1 ***
* ** 9 2 ***
* ** 9 3 ***

* - Represents RD-8X channel the remote device will be assigned to.

** - Represents the modbus address of the remote device. The slave ID for each channel enabled on the
RD-8X must match the modbus address of the remote device. Failure to assign the proper slave ID will
result in a “COMM ERROR” for the corresponding channel.

NOTE: The number of activated channels can be less than (but not greater than) the controller’s
maximum input capacity. The maximum input capacity is 16 channels.

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*** - Represents model 440 channels that will be assigned to a RD-8X channel.

4.3.6 Model RD-8X to Model 840

Table 6

RD-8X: Setup Channel Data

Channel Slave ID Register to Read Reading Register Channel

* ** 13 0 ***

* ** 13 1 ***

* ** 13 2 ***

* ** 13 3 ***

* ** 13 4 ***

* ** 13 5 ***

* ** 13 6 ***

* ** 13 7 ***

* - Represents RD-8X channel the remote device will be assigned to.

** - Represents the modbus address of the remote device. The slave ID for each channel enabled on the
RD-8X must match the modbus address of the remote device. Failure to assign the proper slave ID will
result in a “COMM ERROR” for the corresponding channel.

NOTE: The number of activated channels can be less than (but not greater than) the controller’s
maximum input capacity. The maximum input capacity is 16 channels.

*** - Represents model 840 channels that will be assigned to a RD-8X channel.

Model 840

4.4 Display Contrast

The Contrast Potentiometer located on the right hand side of the PCB adjusts the display contrast. The
Potentiometer is labeled “CONTRAST”.

4.5 Reset Switch

The “RESET” Switch located on the right side of the unit is not supported with this revision of Firmware,
and has no functionality.

5. Modbus Communications

The model RD-8X features a Modbus compatible communications protocol and is addressable by PLC,
PC/HMI, DCS, or other Modbus RTU master-polling devices. Communication is accomplished by two
wire half duplex RS-485, 9600 baud, 8 data bits, 1 stop bit, no parity, through the controller COM1
connection port (P3). The Slave ID number is defaulted to 01Hex.

Modbus™ Register Detail:
Code 03 - Read Holding Registers, is the only code supported by the RD-8X.

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RD-8X-N4X Operators Manual

Register #
40000 Channel 1 Reading
40001 Channel 2 Reading
40002 Channel 3 Reading
40003 Channel 4 Reading
40004 Channel 5 Reading
40005 Channel 6 Reading
40006 Channel 7 Reading
40007 Channel 8 Reading
40008 Channel 9 Reading
40009 Channel 10 Reading
4000A Channel 11 Reading
4000B Channel 12 Reading
4000C Channel 13 Reading
4000D Channel 14 Reading
4000E Channel 15 Reading
4000F Channel 16 Reading

6. Warranty

Detcon, Inc., as the manufacturer, warrants under intended normal use each new Model RD-8X to be free
from defects in material and workmanship for a period of one year from the date of shipment to the original
purchaser. Should the controller fail to perform in accordance with published specifications within the
warranty period, return to Detcon, Inc., for necessary repairs or replacement. All warranties and service
policies are FOB the Detcon facility located in The Woodlands, Texas.

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RD-8X-N4X Operators Manual

Appendix A

Revision History

Revision Date Changes made

0.0 03/18/2009 Manual Created

1.0 11/24/09 Update to 16 channels, correct front panel layout, and other corrections

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Appendix B

Drawings and Diagrams

1. RD-8X-N4X Dimensional Overview

2. RD-8X-N4X Component Layout

3. RD-8X-N4X Interconnect Wiring Diagram

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Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

Ph

Model RD-8X-N4X Operator Manual Rev. 1.0 Page 14 of 14

one: 888.367.4286, 281.367.4100 • Fax: [phone] • Hwww.detcon.com

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

H • [e-mail]

U

RD-8X-N4X Operators Manual

This page left intentionally blank

Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

Ph

Model RD-8X-N4X Operator Manual Rev. 1.0

one: 888.367.4286, 281.367.4100 • Fax: 281.292.286 0 • Hwww.detcon.com

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

H • [e-mail]

U

RD-8X-N4X Operators Manual

This page left intentionally blank

Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

Ph

Model RD-8X-N4X Operator Manual Rev. 1.0

one: 888.367.4286, 281.367.4100 • Fax: 281.292.286 0 • Hwww.detcon.com

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

H • [e-mail]

U

RD-8X-N4X Operators Manual

This page left intentionally blank

Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

Ph

Model RD-8X-N4X Operator Manual Rev. 1.0

one: 888.367.4286, 281.367.4100 • Fax: 281.292.286 0 • Hwww.detcon.com

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

H • [e-mail]

U