RKI Instruments M2A - Page 30

30 M2A Transmitter Operator’s Manual
CSA Type CO or H
2
S Gas Detectors
Red wire to terminal labeled TOXIC +, black wire to terminal labeled TOXIC -.
Figure 26: H
2
S/CO Detector Wiring, CSA
Non Explosion Proof CO or H
2
S Gas Detectors
Red wire to terminal labeled TOXIC +, black wire to terminal labeled TOXIC -.
Figure 27: H
2
S/CO Detector Wiring
Black
Red
C NC NO
ALARM 1
C NC NO
ALARM 2
C NC NO
FAIL
- S +
PWR/SIG
TOXIC OXY
+ - + -
RS 485
A B C
Black
- S +
PWR/SIG
TOXIC OXY
+ - + -
RS 485
A B C
C NC NO
ALARM 1
C NC NO
ALARM 2
C NC NO
FAIL
Red
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