65-2646XL-05-04 M2A Transmitter Operator’s Manual
Chapter 3: Installation & Startup
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18
Wiring the M2A Transmitter
Wiring the Detector to the M2A
WARNING: Always verify that the power to the M2A is off before you make wiring
connections.
1. Confirm that no power is being applied to the M2A.
2. Remove the detector junction box’s cover from the junction box.
3. Remove the M2A junction box’s cover from the junction box.
4. Grasp the control PCB by its edges.
5. 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.
6. 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.
7. To maintain the explosion proof classification of the junction boxes, conduit seals must be
installed as shown in Figure 8. Adhere to your local electrical code when installing the conduit
seal.
8. To maintain the M2A junction box’s NEMA 4X environmental rating and prevent water from
entering the junction box through the conduit hubs, use appropriate construction technique.
9. Guide a two-conductor, shielded cable or two wires in conduit through the top conduit hub of
the detector junction box. To make wiring more convenient, use wire colors that correspond to
the detector wire colors: red and black.
10. Connect the wires to the terminal block in the detector junction box.
11. Secure the detector junction box’s cover to the junction box.
12. Guide the other end of the two-conductor, shielded cable or two wires in conduit through the
bottom conduit hub of the M2A junction box.
Max Distance to
M2A w/18 Gauge
Wire
Max Distance to
M2A w/16 Gauge
Wire
Max Distance to
M2A w/14 Gauge
Wire
500 ft.
1,000 ft.
2,000 ft.
