18
65-2645-05SS-04 M2A Transmitter Operator’s Manual
14. Pull out the detector terminal strip and connect the two wires to the terminal strip as follows (see Figure 8).
•
Connect the wire corresponding to the detector’s red wire to the
TOXIC “+”
terminal.
•
Connect the wire corresponding to the detector’s black wire to the
TOXIC “-”
terminal.
CAUTION:
If shielded cable is used, leave the cable shield’s drain wire disconnected and insulated at the
detector junction box. You will connect the opposite end of the cable’s drain wire to the M2A
junction box’s chassis (earth) ground.
Figure 8: Wiring the Detector to the M2A
15. Reinstall the detector terminal strip into its socket.
16. 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.
Red
Red
Blac k
Detector J -B ox
A
B
C
R
S
485
+
+
T
O
X
IC
O
X
Y
Detector
Term inal
Strip
-
S
+
C
NC
NO
AL
A
R
M
1
C
NC
NO
AL
A
R
M
2
C
NC
NO
FA
IL
H2S Detector
PW
R
/SI
G
M 2A
J- Box
Blac k
Install c onduit seal within
2 i nches ( for G roup B
env ironm ents) or 18
inches (for G roups C and
D e nv ironm ents)
Install c onduit seal
within 2 i nches
Cable
Shield
Calibration A dapter /S plash G uard
