RKI Instruments M2A - Page 31

M2A Transmitter Operator’s Manual 31
ESM-01 Toxic Detectors
The ESM-01 toxic detectors have one black wire and one color coded wire. Connect the color coded wire
(see chart below) to the terminal labeled TOXIC + and the black wire to the terminal labeled TOXIC -.
Figure 28: ESM-01 Toxic Detector Wiring
Black
Brown AsH3
Yellow Cl2
See Chart
White HCN
Green PH3
Blue SO2
Red NH3
C NC NO
ALARM 1
C NC NO
ALARM 2
C NC NO
FAIL
- S +
PWR/SIG
TOXIC OXY
+ - + -
RS 485
A B C
Gas TypeWire Color
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