ENMET MX-48 User Manual
ENMET
ENMET Corporation
ENMETENMET
PO Box 979
Ann Arbor, MI 48106-0979
E
Operation and Maintenance
NGUARD
MX48 C
Manual
ONTROL
Manual Part Number
80003-048
MCN-359, 06/15/07
Table of Contents
1.0 Introduction....................................................................................................................................................................1
1.1 Unpack.......................................................................................................................................................................1
1.2 Check Order...............................................................................................................................................................1
1.3 Serial Numbers...........................................................................................................................................................1
2.0 Features..........................................................................................................................................................................2
2.1 The wall-mounted enclosure .......................................................................................................................................2
3.0 Installation .....................................................................................................................................................................3
3.1 Installation Recommendations.....................................................................................................................................3
3.2 Electrical Connection of the MX48 C
3.2.1 AC power supply..................................................................................................................................................4
3.2.2 DC Supply Input ..................................................................................................................................................4
3.2.3 4-20 Sensor/Transmitter .......................................................................................................................................6
3.2.4 Relay Contacts.....................................................................................................................................................6
3.2.5 Wiring Requirements...........................................................................................................................................6
4.0 Operation .......................................................................................................................................................................8
4.1 Checking the Installation.............................................................................................................................................8
2.2 Turning On the Control...............................................................................................................................................8
4.3 Operating Modes ........................................................................................................................................................9
4.3.1 Buzzer: ................................................................................................................................................................9
4.3.2 Light-emitting Diodes (LED)................................................................................................................................9
4.3.3 Alarm Thresholds...............................................................................................................................................10
4.3.4 Normal Non-alarm Operation.............................................................................................................................10
5.0 Programming................................................................................................................................................................11
5.1 Front Panel Keypad ..................................................................................................................................................11
5.2 Maintenance Switches...............................................................................................................................................12
5.3 Menus ......................................................................................................................................................................13
5.3.1 Menus and their Functions..................................................................................................................................13
5.3.2 Legend for Block Diagrams of Programming Menus...........................................................................................14
5.4 Bock Diagram of Scrolling Programming Menus.......................................................................................................15
5.4.1 Block Diagram of Channel Programming Menu..................................................................................................16
5.4.2 Block Diagram of Simulation Programming Menu..............................................................................................21
5.4.3 Block Diagram of Programming Copy Channel..................................................................................................22
5.4.4 Block Diagram of Programming Control Unit.....................................................................................................23
5.4.5 Block Diagram of Reprogramming Programming...............................................................................................25
6.0 WARRANTY...............................................................................................................................................................26
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..............................................................................................................4
List of Illustrations
Figure 1: Interior View of MX48 C
Figure 1a: On/Off Switch Power Supply Board.....................................................................................................................2
Figure 2: Mounting MX48 C
Figure 3: Power Supply Board Connections..........................................................................................................................5
Table 1: Wiring for a Two Wire S/T.....................................................................................................................................6
Table 2: Wiring for a Three Wire S/T ...................................................................................................................................6
Table 3: Typical Channel terminal strip connections .............................................................................................................6
Figure 3a: Typical Channel Board ........................................................................................................................................7
Table 4: Potentiometers per Channel.....................................................................................................................................7
Table 5: Front Panel LED Indications...................................................................................................................................9
Figure 4: MX48 C
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Front Panel .................................................................................................................................9
Figure 4a: Front Panel Keypad Buttons.................................................................................................................................9
Figure 5: Display Board .....................................................................................................................................................12
Figure 5a: Maintenance Keypad Switches...........................................................................................................................12
Table 6: Programming Functions........................................................................................................................................13
Figure 6: Display Board .....................................................................................................................................................13
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..........................................................................................................................2
....................................................................................................................................3
MX48 C
1.0 Introduction
1.0 Introduction
1.0 Introduction1.0 Introduction
N
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The MX48 C
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 MX48 C
thresholds. If thresholds are exceeded, the control actuates relays that can be used to control external devices.
Each of the two Channel Boards installed in the MX48 C
channels.
OTE
: All specifications stated in this manual may change without notice.
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can include from 1 to 8 independent channels.
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is equipped with circuits for four independent
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and compared with alarm
ENMET Corporation
1.1 Unpack
Unpack the MX48 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
1.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the MX48 C
ordered. 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.
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is received as
1.3 Serial Numbers
Each MX48 C
database.
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is serialized. These numbers are on tags on the equipment and are on record in an ENMET
1
ENMET Corporation MX48 C
to hold cover open
Power On/Off
2.0 Features
2.0 Features
2.0 Features2.0 Features
2.1 The wall-mounted enclosure
The enclosure of the MX48 C
pivoted up to access the interior.
For overall dimensions see section 3 installation, Figure 2 exterior view.
For over view of interior see Figure 1 interior view.
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is a wall-mounted box consisting of a case and a cover that can be
¼ turn latches, 2 pl
Enclosure
Locking Brace
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Keypad
Display Board
Channel 1 – 4 Board
Cable Glands, 15 pl
Figure 1: Interior View of MX48 C
Transformer
Power Supply Board
See Figure 1a
Channel 5 – 8 Board
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Switch
Figure 1a: On/Off Switch Power Supply Board
2
MX48 C
19.75
″
″
3.75
″
.37
″
17.50″17.50
″
3.56
″
″
″
4.93
″
″
″
″
″
3.0 Installation
3.0 Installation
3.0 Installation3.0 Installation
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3.1 Installation Recommendations
The MX48 C
in a ventilated area under surveillance such as a, guard post, control room, instrumentation room, etc.
N
OTE
: To be able to fully open the hinged front cover of the MX48 C
The MX48 C
back of the enclosure. See Figure 2
12.50
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can be installed anywhere away from an explosive atmosphere. It should preferably be located
cover 90 degrees upwards see Figure 1.
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is mounted on the wall with one bracket attached to the wall and the mating bracket is on the
Mounting Bracket
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, allow space for opening by rotating the
ENMET Corporation
1.12″
8.87
.62
16.12″16.12
.31
1.12″
.25″.25
.5
1.12″
Figure 2: Mounting MX48 C
Front ViewFront View
Mounting
Bracket
Back View
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3
ENMET Corporation MX48 C
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3.2 Electrical Connection of the MX48 C
To make electrical connections, turn off the control using the general ON/O
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FF
switch located on the power supply
board, see Figure 1a for location of ON/OFF switch.
The MX48 C
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is equipped with an automatic switching circuit to connect to 24VDC power should the 110V
power fail. Hence, it is possible to use inexpensive backup power supplies.
W
ARNING
:
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.
3.2.1 AC power supply
Voltage:
Maximum power:
Maximum input current
Cable
Location of connection terminals:
Protection: the phase and neutral wires are protected by time-delay 2A fuses located
Optional Voltage:
110 VAC (103 to 122 V) 50/60 Hz
120 V
AC
2Amp
3 × 1.5 mm2 (earth included)
See Figure 3
on the power supply board
220 VAC (207 to 244 V) 50/60 Hz (optional, must specify when ordering)
AC
C
AUTION
: It is absolutely essential for the MX48 C
within and outside the enclosure. This connection is necessary to ensure the proper operation of
the main power interference suppression filter
the components for protection against electromagnetic interference
3.2.2 DC Supply Input
Voltage:
Maximum power:
Maximum input current
Cable
Location of connection terminals:
Protection:
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to be connected to earth ground. Connection is provided
21 to 30 VDC The “minus” of the DC supply is ground and connected to
the chassis.
150 W
6.3 Amp
2 x2.5 mm
2
See Figure 3
There are 2 fuses, (6.3 A) situated on the power supply board
4
MX48 C
Connector to
Terminal to
Power On/Off
110V
–24V
I
NPUT
+24V
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Display Board
ENMET Corporation
Transformer
Switch
Alarm Relay
Fault Relay
24 VDC Fuses
Clear 1
Clear 2
GND
485-A
485-B
Figure 3: Power Supply Board Connections
DC
DC
I
NPUT
Fault relay
Fault relay
AL3, S
AL3, S
Filter
2A, AC Fuses
AC
Or Optional
NC
YSTEM ALARM RELAY
210VAC if installed
YSTEM ALARM RELAY
5
ENMET Corporation MX48 C
W
ARNING
:
Each channel of the MX48 C
connected. A typical four-channel circuit board is shown in Figure 3a and wiring for this terminal is
shown in Table 3.
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has a terminal strip to which all wiring for that channel is
3.2.3 4-20 Sensor/Transmitter
Sensor/Transmitters are connected to positions C1, C2 and C3 on each channel terminal strip. Connections are shown
in Table 1 for two wire S/T and Table 2 for three wire S/T. See Figure 3a for location of channel terminal strips.
Table 1: Wiring for a Two Wire S/T Table 2: Wiring for a Three Wire S/T
Two Wire Sensor/Transmitter Three wire Sensor/Transmitter
C1
C2 Not used C2 Ground
C3 Signal plus, +24VDC power C3 +24VDC power
4-20mA Output Signal
The (+ 4/20 -) positions in each channel terminal is the 4-20mA output from the Control. The plus and minus sides of
the loop are indicated on the terminal strip. See Figure 3a and Table 3.
Signal minus (––––)
3.2.4 Relay Contacts
Auxiliary alarms should be powered from an independent power source separate form the instrument power to avoid
alarm failure due to controller malfunction.
MX48 C
of each channel terminal strip, as indicated in Figure 3a and Table 3. There are 3-pin headers located to the right of the
channel terminals for setting relays to normally open or normally closed operation. To set relays place jumpers in the
position indicated in Figure 3a. These relays have a maximum capacity of 2 Amp at 230 Volts, and are programmed
as described in Section 5.
The system alarm relay contacts AL3 are on the power supply board, as shown in Figure 3.
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relay contacts for the first two alarm levels are on the RL, 1, RL and 2 (reference # 6 – 9) positions
C1 Signal
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3.2.5 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 can be suitable insulated wire.
Table 3: Typical Channel terminal strip connections
Reference: # Labeled Connection
1 C1 Signal
2 C2 Ground
3 C3
4 + +4-20mA output
5 – –4-20mA output (Ground)
6 RL Alarm 1 relay
7 1 Alarm 1 relay
8 RL Alarm 2 relay
9 2 Alarm 2 relay
+24V
DC
6
MX48 C
20 =
Fuse
Fuse
Channel Terminal
Channel Terminal
Channel Alarm Relays Jumper Positions
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ENMET Corporation
Typical Labeling
Display POTs for
Channel 1 or 5
see Caution
Fuse
Channel 1 or 5
Channel 2 or 6
Display POTs for
Channel 2 or 6
see Caution
Fuse
Fuse
Display POTs for
Channel 3 or 7
see Caution
Fuse Fuse Fuse
Channel 3 or 7
Channel 4 or 8
Display POTs for
Channel 4 or 8
see Caution
2
3 4
1
5
Numbers used as
reference in Table 3
See Figure 1 for location of Channel Boards within
MX48 C
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enclosure.
For channels 5 through 8 on second Channel Board:
♦ Channel 1 = Channel 5
♦ Channel 2 = Channel 6
♦ Channel 3 = Channel 7
♦ Channel 4 = Channel 8
Display Potentiometers
Caution:
Each channel display is adjusted at the factory and should not need to be readjusted. Any alignment
should be adjusted at the sensor/transmitter. Table 4 provides the function of MX48 C
potentiometers if adjusted by mistake.
Table 4: Potentiometers per Channel
Left /2 O =
Right /2 4 = potentiometer 4 mA / current output
Control display ZERO potentiometer
S = Control display span potentiometer
potentiometer 20 mA / current output (for full scale)
687
9
Figure 3a: Typical Channel Board
Jumper position on pins 1 & 2
for NC contact (factory setting)
Jumper position on pins 2 & 3
for NO contact
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7
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