ENMET MX-52 User Manual
ENMET
ENMET Corporation
ENMETENMET
PO Box 979
Ann Arbor, MI 48106-0979
80003-052
July 1999
MCN-233, 05/26/00
MCN-286, 10/17/02
MCN-300, 08/21/03
MCN-306, 10/03/03
MCN-360, 10/30/06
MX52 C
Manual
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Table of Contents
1.0 I
NTRODUCTION
1.1.2 Unpack...................................................................................................................................................................................1
1.1.3 Check Order...........................................................................................................................................................................1
1.1.4 Serial Numbers....................................................................................................................................................................... 1
2.0 S
PECIFICATIONS
3.0 F
EATURES
4.0 I
NSTALLATION
4.1 Installation recommendations......................................................................................................................................6
4.2 Electrical Connections of the MX52 C
4.2.1 Power Supply.........................................................................................................................................................................7
4.2.2 DC Power supply....................................................................................................................................................................7
4.3 Channel Board Connections........................................................................................................................................7
4.3.1 Sensor/Transmitter.................................................................................................................................................................7
4.3.2 4-20mA Output Signal ............................................................................................................................................................7
4.3.3 Relay Contacts .......................................................................................................................................................................7
4.3.4 Wiring Requirements..............................................................................................................................................................7
4.4 Connecting the MX52 C
4.4.1 Alarm Relays..........................................................................................................................................................................8
4.4.2 The 4-20mA Current Outputs..................................................................................................................................................9
4.4.3 Series Output........................................................................................................................................................................ 10
4.4.4 Remote Acknowledgement..................................................................................................................................................... 10
5.0 O
PERATION
5.1 Starting Up...............................................................................................................................................................11
5.1.1 Checking the Installation...................................................................................................................................................... 11
5.1.2 Switching the MX52 C
5.2 Operating Modes ......................................................................................................................................................12
5.2.1 Audio Alarm (Buzzer)........................................................................................................................................................... 12
5.2.2 Light-emitting diodes (LED) (Figure 10)...............................................................................................................................13
5.2.3 Alarm Thresholds................................................................................................................................................................. 13
5.2.4 Fault Thresholds ..................................................................................................................................................................15
5.2.5 Standard Display..................................................................................................................................................................15
5.3 Functions of Switches and Menus for Programming and Calibration of MX52 C
5.3.1 Keypad (see Figures 10 and 4).............................................................................................................................................. 16
5.3.2 Maintenance Switches........................................................................................................................................................... 16
5.3.3 Potentiometers...................................................................................................................................................................... 16
5.4 Menus......................................................................................................................................................................17
5.4.1 Menus and their Functions....................................................................................................................................................17
5.4.2 Legend for Block Diagrams of Programming Menus.............................................................................................................. 17
5.4.3 Bock Diagram of Scrolling Programming Menus...................................................................................................................18
5.4.4 Block Diagram of Channel Programming Menu....................................................................................................................19
5.4.5 Block Diagram of Simulation Programming Menu.................................................................................................................24
5.4.6 Block Diagram of Programming Copy Channel..................................................................................................................... 25
5.4.7 Block Diagram of Programming Control Unit.......................................................................................................................26
5.4.8 Block Diagram of Reprogramming Programming..................................................................................................................28
5.5 Startup of the MX52 C
5.5.1 Programming the Control..................................................................................................................................................... 29
5.5.2 Programming the Channels................................................................................................................................................... 29
5.5.3 Calibrations.........................................................................................................................................................................29
6.0 M
AINTENANCE
6.1 Periodic / Preventive Maintenance............................................................................................................................31
6.1.1 On the MX52 C
6.1.2 On the Sensor/Transmitters...................................................................................................................................................31
6.2 Troubleshooting: Symptoms and Remedies...............................................................................................................32
7.0 WARRANTY................................................................................................................................................ 34
A
PPENDIX
A: L
Replacement Part Numbers.............................................................................................................................................35
A
PPENDIX
B: L
................................................................................................................................................. 1
.............................................................................................................................................. 2
....................................................................................................................................................... 5
.................................................................................................................................................. 6
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to External Devices ..................................................................................................8
............................................................................................................7
................................................................................................................................................... 11
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On........................................................................................................................................12
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.................................................................................................................................29
...........................................16
............................................................................................................................................... 31
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........................................................................................................................................................31
IST OF UNITS
IST OF GASES
................................................................................................................................. 35
................................................................................................................................ 36
The List of Illustrations
Figure 1: MX52 Overall Dimensions...................................................................................................................................3
Figure 2: MX52 C
Figure 3: MX52 C
Figure 4: MX52 C
Figure 5: Power Board and Module....................................................................................................................................6
Figure 7: Channel Board....................................................................................................................................................8
Figure 8: Example of External Device Connection.............................................................................................................9
Figure 9A: Pinout of the MX52 Serial Link Connector Sub D..........................................................................................10
Figure 9: Micro Board......................................................................................................................................................10
Figure 10: Operation Components....................................................................................................................................11
Block Diagram 1: Normal Cycle with Manual Clearing....................................................................................................13
Block Diagram 2: Normal Cycle with Automatic Clearing................................................................................................14
Block Diagram 3: Parking Cycle.......................................................................................................................................14
Block Diagram 4: Fault ....................................................................................................................................................15
Figure 11: Potentiometer Layout on Front of Channel Board ..........................................................................................30
Figure 12: Channel Board, Outputs on Rear Connector...................................................................................................31
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Front View, Internal.................................................................................................................4
Rear View..................................................................................................................................4
Features....................................................................................................................................5
Reference information:
N
OTE
: [important information about use of instrument – if not followed may have to redo some steps.]
C
W
ARNING
AUTION
: [affects equipment – if not followed may cause damage to instrument, sensor etc…]
:
[affects personnel safety – if not followed may cause bodily injury or death.]
MX52 C
1.0 Introduction
1.0 Introduction
1.0 Introduction1.0 Introduction
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The MX52 C
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ENMET Corporation
can include from 1 to 16 independent channels.
Each channel is connected to one or more 4-20 mA sensor/transmitters installed in the locations to be monitored.
The output from each sensor/transmitter (S/T) is displayed on the MX52 C
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and compared with alarm
thresholds. If thresholds are exceeded, the control actuates relays that can be used to control external devices.
Each PCB installed in the MX52 C
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is equipped with circuits for two independent channels. The number of
PCB’s is always half the even number equal to or one greater than the number of channels installed.
N
OTE
: All specifications stated in this manual may change without notice.
1.1 Upon Receipt
1.1.2 Unpack
Unpack the MX52 C
customer service personnel and the commercial carrier involved immediately.
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and examine it for shipping damage. If such damage is observed, notify both ENMET
Regarding Damaged Shipments
N
OTE
: It is your responsibility to follow these instructions. If they are not followed, the carrier will
not honor any claims for damage.
This shipment was carefully inspected, verified and properly packaged at our company and delivered to the
carrier in good condition.
When it was picked up by the carrier at ENMET, it legally became your company’s property.
If your shipment arrives damaged:
• Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local
office and request immediate inspection of the carton and the contents.
• After the inspection and after you have received written acknowledgment of the damage from the carrier,
contact ENMET Customer Service for return authorization and further instructions. Have your Purchase
Order and Sales Order numbers available.
ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability
coverage, usually $100.00. Repair or replacement charges above that value are your company’s responsibility.
The shipping company may offer optional insurance coverage. ENMET only insures shipments with the
shipping company when asked to do so in writing by our customer. If you need your shipments insured, please
forward a written request to ENMET Customer Service.
Regarding Shortages
If there are any shortages or questions regarding this shipment, please notify ENMET Customer Service within 5 days
of receipt at the following address:
ENMET Corporation
680 Fairfield Court
Ann Arbor, MI 48108
734-761-1270 734-761-3220 Fax
1.1.3 Check Order
Check, the contents of the shipment against the purchase order. Verify that the MX52 C
ordered. Each MX52 C
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is programmed with the target gas for each channel. If there are accessories on the
order, ascertain that they are present. Check the contents of calibration kits. Notify ENMET customer service
personnel of any discrepancy immediately.
1.1.4 Serial Numbers
Each MX52 C
database.
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is serialized. These numbers are on tags on the equipment and are on record in an ENMET
1
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received is, as
ENMET Corporation MX52 C
2.0 Specifications
2.0 Specifications
2.0 Specifications2.0 Specifications
See Figure 1 for overall dimensions and Figures 2 and 3 for front and rear views.
Enclosure:
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Overall dimensions
Function
Capacity
Measurement
Storage temperature
Operation temperature
Relative humidity
Visual
Display
Alarms
Audio Alarms Alarm remote acknowledgement
Inputs Active 2-wire or 3-wire shielded cables according to the type of
Signal Outputs
Rack 3U 19″
Control
16 measuring channels
Continuous
–20 C to +55 C
–10 C to +45 C
0 to 95% humidity, no condensation
Fluorescent display panel, 2 lines of 16 characters
80 LED (power on, gas alarms, faults)
sensor/transmitters
Resistance in loop mode 4-20mA, 2-wire or 3-wire 56Ω (2,000m with wire 1.5
mm2 at 20 C)
4-20mA analog per channel, maximum load resistance = 600Ω
Serial: RS 485 / J BUS, common
Relay Outputs 2 independent alarm relays per channel
1 common relay for alarm 3 or audio alarm transfer
1 common fault relay
Power Supply AC or DC power supply
103 to 122 V
207 to 244 VAC (Optional)
21 to 31 V
Power consumption: 300 Va or 240 W
N
OTE
: All specifications stated in this manual may change without notice.
AC
DC
2
MX52 C
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ENMET Corporation
Dimensions are in inches
Top View
Front View
Figure 1: MX52 Overall Dimensions
3
ENMET Corporation MX52 C
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Figure 2: MX52 C
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Front View, Internal
Figure 3: MX52 C
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4
Rear View
MX52 C
2 channels per board
Buzzer
3.0 Features
3.0 Features
3.0 Features3.0 Features
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See Figure 4 for features.
Power Card
Display
On/Off Pushbutton Switch
Keypad
Buzzer
LEDs
Interconnect board
Channel Boards
Micro Board
Description Function
Internal power supply
See figures 5 for detail.
For visual display of:
Channel, Gas (type and reading), Data when programming etc…
To power up and remove power of the MX52 C
Pushbutton switches used in programming and calibration
See figure 10 for detail
For audio alarms
For visual alarms
Interface for: Channel boards, Display, Keypad, LED and Buzzer
Control for each channel: .2 channels per board
See figure 7 for detail.
Connection for remote access of MX52
See figure 9
Power Supply
Refer to Figure 5
ENMET Corporation
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Power Supply Card
Refer to figure 5
Display
Keypad Area
Pushbutton switches
On/Off
Pushbutton
Switch
FRONT interconnect board
Rows of LEDs
for each channel
Rows of POTs
for each channel
Micro Board
See figure 9 for detail
8 Channel boards
• 2 channels per board
See figure 7 for detail
Channel board
Figure 4: MX52 C
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5
Features
ENMET Corporation MX52 C
Note:
4.0 Installation
4.0 Installation
4.0 Installation4.0 Installation
4.1 Installation recommendations
The MX52 C
ventilated and monitored location, such as guardhouse, control room, instrumentation room, etc.
The control can be mounted in any standard 19″ rack. See Figure 1 for dimensions. Optional enclosures and wall
shelves are available.
Before making any connections, switch off the power using the main On/Off switch below and to the left of the
FRONT circuit (see Figures 4 and 10).
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can be installed in any area without a hazardous atmosphere. It should preferably be placed in a
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Power Supply Terminal
Earth Ground
Terminal
Power connections are located on a terminal strip in this location.
Note the location of the relevant positions as labeled on the terminal
strip and wire accordingly. Positions of the AC & DC contacts may
vary depending on the required power supply
Figure 5: Power Board and Module
6
MX52 C
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ENMET Corporation
4.2 Electrical Connections of the MX52 C
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4.2.1 Power Supply
Voltage: 115 VAC (103 to 122 V) 50/60 Hz
Maximum power: 300 VA
Maximum current in cable: 1.5 A
Power wire, 3 conductors, 16g
Location of connection terminal blocks, see Figure 5
Protection: Overvoltage Clamp, 130 – 150% & Current Limit 130% typ, Self-Reset Foldback
Voltage: 207 to 244 V
W
ARNING
C
AUTION
:
Continuous gas detection and alarm systems (110VAC/220VAC /24VDC/12VDC powered) become
inoperative upon loss of primary power. Contact factory for specifications and pricing of backup
battery systems.
:
It is mandatory that the instrument must be grounded to earth ground. This normally occurs through the ground
(green) wire of the AC power system. A terminal is also reserved for this purpose at the back of the power card,
see Figure 5. The ground connection is required in order to ensure correct operation of the following
• Power interference filter
• Protective devices against electromagnetic interference
AC
- 50/60 Hz on option
4.2.2 DC Power supply
Voltage: 21 to 30 V
Maximum power: 240 W
Maximum current in cable: 12.5 A
Cable: 2 x 14g
Location of terminal block, see Figure 5
Protection: Two fuses located at the back of the power card. See figure 5
DC
4.3 Channel Board Connections
Each channel board includes terminal strips for each of two channels. The terminal strips for odd-numbered channels
are at the top, the terminal strips for even-numbered channels are at the bottom of each channel board. Figure 7 shows
these I/O terminal strips and identifies the positions on them.
4.3.1 Sensor/Transmitter
Sensor/Transmitters are connected to positions C1, C2 and C3 on each channel terminal strip. Connections are as follows:
Two Wire Sensor/Transmitter Three wire Sensor/Transmitter
C1 Signal, minus C1 Signal
C2 Not used C2 Ground
C3 Signal, plus and +24VDC power C3 +24VDC power
4.3.2 4-20mA Output Signal
The next two (+ 4-20mA –) positions in each terminal is the 4-20mA output from the C
sides of the loop are indicated on the terminal strip.
4.3.3 Relay Contacts
MX52 C
indicated in Figure 7. These relays have a maximum capacity of 2 Amp at 230 Volts, and are programmed as described
in Section 4.4.1. Open or closed contacts are selected with jumpers on the channel board as indicated in Figure7.
Figure 8 shows an example of external devices controlled by the MX52 C
The system alarm relay contacts AL3 are on the power supply board, as shown in Figure 5.
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relay contacts for the first two alarm levels are on the next four positions on the terminal strips, as
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4.3.4 Wiring Requirements
Sensor/Transmitters: Wiring to the sensor/transmitters should be by two or three wire shielded cable. The
recommended cable is 18 gauge three wire, ENMET part number 66017-006, Alpha-1747C or equivalent.
Output Loop: Wiring to output loop should be similar two wire shielded cable.
Relay: Relay wiring must be suitable insulated wire.
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relay contacts.
. The plus and minus
7
ENMET Corporation MX52 C
Output connector
Output connector
Signal Fuse
Signal Fuse
Line Fuse
Line Fuse
Odd-numbered channel
Potentiometers
Potentiometers
2
4-20mA
4-20mA
Relay Alarm 2
End View
End ViewEnd View
End View
Signal Fuse
Signal Fuse
Side View
4.4 Connecting the MX52 C
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to External Devices
4.4.1 Alarm Relays
The 16 channels of the MX52 C
devices such as sirens, solenoid valves, extractors, telephone callers, etc… Auxiliary alarms should be powered from
an independent power source separate from instrument power to avoid alarm failure due to controller malfunction.
An example of connection is given in Figure 8
F
OR EACH CHANNEL
:
The following relays are available (see Figure 7 and 12):
A relay associated with the triggering of alarm 1.
A relay associated with the triggering of alarm 2.
Use of open or closed contacts selected with a jumper (see Figure 7).
Use of positive or negative safety selected by programming (see the CHANNEL programming menu).
Contact outputs on the back of the two channel PCB (see Figure 12).
F
OR SYSTEM RELAY
:
A relay associated with the triggering of alarm 3.
A relay associated with the triggering of a system fault.
Odd-numbered channel
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unit are each equipped with two relays that can be used to control external
Odd-numbered channel
See End view, below
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Even-numbered channel
Even-numbered channel
Odd-numbered channel
Even-numbered channel
Even-numbered channel
Even-numbered channel
C1
C2
C3
Relay Alarm 1
RL
RL
Odd-numbered channel
Relay Al1
odd channel
Relay Al2
odd channel
Relay Al1
even channel
Relay Al2
even channel
Even-numbered channel
See End View, below
+
–
1
Output connector
Odd-numbered Channels
Jumpers
Open/closed contacts
Factory set NC
Even-numbered channel
Jumpers
Open/closed contacts
Factory set NC
Relay Alarm 1
Relay Alarm 2
Figure 7: Channel Board
C1
C2
C3
RL
RL
+
–
1
2
Output connector
Even-numbered Channels
8
MX52 C
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N
OTE
: Auxiliary alarms should be powered from an independent
110V
AC
power source separate from instrument power to avoid
alarm failure due to controller malfunction.
Figure 8: Example of External Device Connection
ENMET Corporation
A siren connected to relay AL1 is actuated when alarm 1 is triggered,
A solenoid valve connected to relay AL2 is actuated when alarm 2 is triggered.
F
OR ALL CHANNELS
A common relay is associated with the triggering of alarm 3 for any and all of the 16 channels.
By programming, this common relay can also be used for the remote transmission of the audio warning signal. This
relay is then associated with all the control alarms. (See Figure 5)
A Fault relay associated with the triggering of channel faults (detector failures, electrical connections, excessively
negative zero, etc.). The Fault Relay is normally closed, it opens when in fault condition.
Common relay contact outputs are on the back of the power card: Figure 5.
N
OTE
: The breaking capacity of the MX52 C
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relay contacts is 2 A / 250 V
AC
or 30 VDC, so external
intermediate relays must be used if the devices to be controlled require high current levels.
4.4.2 The 4-20mA Current Outputs
For each channel, the MX52 C
sensor/transmitter outputs to a recorder, an external PLC or a computer. The maximum resistance in loop mode is 600
ohms. The ground connections for the 4-20 mA outputs are common. The 4-20 mA lines are not galvanically
insulated one from the other. The current output varies according to the situation and has several conditions other than
normal, as follows:
On starting up the unit: I < 1 mA
With FAULT: I < 1 mA
In MAINTENANCE mode: I = 2 mA
ZERO MEASUREMENT: I = 4 mA
Full scale: I = 20 mA
Out of range or “in doubt”: I > 23.2 mA
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is equipped with a 4-20 mA output that can be used to retransmit
9
ENMET Corporation MX52 C
4.4.3 Series Output
A single “sub. D” connector located on the back of the micro board is equipped with both an RS485 output in J-BUS
format for the uploading of data from the MX52 unit to a computer and an RS 232 output for programming of the
MX52 C
C
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Several MX52 C
number is assigned to each MX52 C
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:
A computer must be used in order to printout the data stored by the MX52 C
external environment. See Figure 9A for details of the pinout of this connector.
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can be connected to a single computer which is the “MASTER”. In this case, a SLAVE
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.
Pin 1
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.
Pin 6
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Pin 5
Figure 9A: Pinout of the MX52 Serial Link Connector Sub D
4.4.4 Remote Acknowledgement
It is possible to allow remote acknowledgement by connecting a momentary push-button, to the terminals provided for
that purpose on the back of the micro board: see Figure 9.
M
ICRO BOARD
part number 02625-002
M
ICRO BOARD
part number 02625-003
Used to isolate Signal Ground from Chassis Ground.
Desirable when connecting several MX52 control units
together as in a “Master”, “Slave” situation, or when
using a computer/PLC setup.
: Standard
Connector Sub D
Output RS485
See Figure 9A
Connector for Remote
Acknowledgement of
Alarm
Micro Processor
: with Galvanic Isolation
Pin 9
Figure 9: Micro Board
10
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