RKI Instruments 65-2640RK-04 - Manual (Page 18)

13 65-2640RK-04 M2A Transmitter Operator’s Manual
Figure 6: Wiring the Detector to the M2A
13. Reinstall the detector terminal strip into its socket.
14. If shielded cable is used between the detector junction box and the M2A junction box,
connect the cable’s drain wire to an available chassis (earth) ground at the M2A
junction box. Do not connect the shield drain wire at the detector junction box.
15. Guide multi conductor shielded cable or cables or wires in conduit through the top
conduit hub of the M2A junction box. The number of cables or wires needed will
depend on whether the M2A is wired to a gas monitoring controller or just to power,
whether any relays are used, and whether the Modbus output is used.
Black
Red
Dete cto r J-Bo x
Dete cto r
Term ina l
Strip
-
S
+
A
B
C
RS
4
85
PW
R
/SI
G
R
W
G
B
LE
L
C
N
C
N
O
AL
AR
M
1
C
N
C
N
O
AL
AR
M 2
C
NC
NO
FA
IL
Com bustib le Ga s
Dete cto r
White
Green
Cable
Shie ld
Black
Green
White
Red
Calibra tion Adapter/Splash Gu ard
M2
J-Box