RKI Instruments M2A - Manual (Page 23)

M2A Transmitter Operator’s Manual 18
Wiring the M2A Transmitter
WARNING: Always verify that the power source is OFF before making any wiring
connections.
1. Remove the junction box cover.
2. Grasp the control PCB by its edges.
3. Gently pull until the control PCB is pulled away from the banana jacks. Take care not to pull
too hard and damage the cable which connects the control and terminal PCBs.
4. Let the control PCB hang by the cable. The terminal strips are now visible on the terminal
PCB. The control PCB may be left hanging while wiring is done. If desired, the control PCB
may be disconnected from the cable and set aside while wiring.
5. The detector leads are factory wired. Verify that the detector leads are wired to the detector
terminal strip as shown in the applicable figure below:
• Catalytic LEL/Combustible IR/CO
2
Detectors
The wiring for these types of detectors is the same. Red wire to terminal labeled LEL R,
white wire to terminal labeled LEL W, green wire to terminal labeled LEL G, black wire to
terminal labeled LEL B.
Figure 17: Catalytic LEL Detector Wiring
Figure 18: Combustible IR/CO
2
Detector Wiring
Green
Black
White
Red -
S
+
A
B
C
RS
4
8
5
PW
R
/SI
G
R
W
G
B
LE
L
C
NC
N
O
AL
AR
M
1
C
NC
N
O
AL
AR
M
2
C
NC
N
O
FA
IL
Green
Black
Red
White
-
S
+
A
B
C
RS
4
8 5
PW
R
/S
IG
R
W
G
B
LE
L
C
NC
NO
AL
A
R
M
1
C
N
C
N
O
AL
A
R
M
2
C
N
C
N
O
FA
IL