RKI Instruments M2A - Page 78

78 M2A Transmitter Operator’s Manual
See Figure 36 below for field wiring connections to the M2A.
Figure 36: PLC and DCS Device Wiring
Alarm 1
Alarm Device
Fail Alarm
Device
Alarm Device
Power
Typical Alarm
Wiring Shown
4-20mA In (S)
(24 VDC) -
24 VDC +
24 VDC
Power Supply
24 VDC -
Alarm 2
Alarm Device
See
Modbus
Wiring
- S +
A B C
RS 485 PWR/SIG
R W G B
LEL
See
Detector
Wiring
Controller
(PLC, DCS)
C NC NO
ALARM 1
C NC NO
ALARM 2
C NC NO
FAIL
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