65-2646XL-05-04 M2A Transmitter Operator’s Manual
Chapter 3: Installation & Startup
•
20
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.
Black
Red
Red
Black
Cable
Shield
C
NC
NO
AL
AR
M
1
C
NC
NO
AL
A
R
M
2
C
NC
N
O
FA
IL
T
O
X
IC
O
X
Y
A
B
C
RS
4
8
5
+
+
PW
R
/SI
G
-
S
+
Install conduit seal within
2 inches (for Group B
environments) or 18
inches (for Groups C and
D environments)
Calibration Adapter/Splash Guard
Detector J-Box
CO Detector
Install conduit seal
within 2 inches
M2A-XL
J-Box
3/4 NPT Conduit Opening
Detector
Term inal
Strip
