ISA-60M
ENMET Corporation
7
Table 1: Wiring ISA-60M
to
MRI-5175
ISA-60M
MRI-5175
Channel 1, J16
+24V (1)
GND (2)
mA (3)
Power
Ground
Signal
Channel 1, J4
+24V
GND
mA
Channel 2, J18
+24V
GND
mA
Power
Ground
Signal
Channel 2, J4
+24V
GND
mA
Channel 3, J19
+24V
GND
mA
Power
Ground
Signal
Channel 3, J4
+24V
GND
mA
Figure 5A: MRI-5175 Input and Output Terminals
3.4.2
ISA-60M
Relay Contacts
Relay contacts are available for each alarm; these are
SPDT
, rated at 10Amp at 110
V
AC
or
10Amp at 30
V
DC
for restive loads,
and may be latching or non-latching as required by the application. They are accessed on the terminals next to each relay see
Figure 2 & 5. The contact positions are noted on the circuit board next to each terminal.
These relay coils are energized when they are in the non-alarm state; the contact conditions given above are for the non-
energized state, which is identical to the alarm state.
In addition, there is a fault relay, which changes state whenever the instrument is in a fault condition. The contact positions are
noted on the circuit board next to each terminal. The coil of this relay is energized when the instrument is in the non-fault state;
the contact conditions given on the circuit board next to the terminal, are for the non-energized state, which is identical to the
fault state.
The PC Board is labeled for the relays in their un-energized state. If the relay is configured for failsafe, then this is also the alarm
condition state. Non-failsafe configured relays in the alarm state, are the reverse of the PC board labeling. Note that the
Fault(FLT) relay cannot be set to operate in a Non-Failsafe mode. Please see the Table 2 below:
Table 2 : Relay Failsafe Settings
Position
Failsafe-Alarm
Non-Failsafe-Alarm
J5
Relay 1 - NO
Normally Open
Normally Closed
J5
Relay 1 - COM
Common
Common
J5
Relay 1 - NC
Normally Closed
Normally Open
J6
Relay 2 - NO
Normally Open
Normally Closed
J6
Relay 2 - COM
Common
Common
J6
Relay 2 - NC
Normally Closed
Normally Open
J8
Relay 3 - NO
Normally Open
Normally Closed
J8
Relay 3 - COM
Common
Common
J8
Relay 3 - NC
Normally Closed
Normally Open
J10
Relay 4 - NO
Normally Open
Normally Closed
J10
Relay 4 - COM
Common
Common
J10
Relay 4 - NC
Normally Closed
Normally Open
J14
Relay 5 - NO
Normally Open
Normally Closed
J14
Relay 5 - COM
Common
Common
J14
Relay 5 - NC
Normally Closed
Normally Open
J15
Relay 6/FLT - NO
Normally Open
N/A
J15
Relay 6/FLT - COM
Common
N/A
J15
Relay 6/FLT - NC
Normally Closed
N/A
These relay contacts can be used to operate auxiliary alarms or other functions.
MRI-5175 Lid, interior view
(Optional)
D–
D+
mA
GND
24V
J4
