RKI Instruments M2A - Manual (Page 72)

67 M2A Transmitter Operator’s Manual
See Figure 31 below for field wiring connections to the M2A.
Figure 31: PLC and DCS Device Wiring
Alarm 1
Alarm Device
Fail Alarm
Device
Alarm Device
Power
Typical Alarm
Wiring Shown
4 - 20 mA In (S)
(24 VDC) -
24 VDC +
24 VDC
Power Supply
24 VDC -
Alarm 2
Alarm Device
See
Modbus
W iring
-
S
+
A
B
C
RS
4
8
5
PWR
/S
IG
R
W
G
B
LE
L
See
Detector
W iring
Controller
(PLC, DCS)
C
N
C
N
O
AL
A
R
M
1
C
NC
N
O
AL
AR
M
2
C
NC
NO
FA
IL