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Chapter 2: Description
M2A-XL Transmitter Operator’s Manual
Chapter 2: Description
Overview
This chapter describes external and internal components of the M2A-XL Transmitter.
External Description
This section describes the junction box and all external components of the M2A-XL transmitter.
Figure 1: M2A-XL External Components
Junction Box
The M2A-XL’s cast aluminum junction box is dust and weather resistant. The junction box also
protects the M2A-XL and all connections made to it. Use the three 3/4 NPT conduit ports to
mount the detector to the junction box (factory installed in the bottom port) and connect wiring
from an external device (left port). The top port is shipped with a factory installed and sealed
conduit plug to avoid leaks into the junction box. If necessary, the conduit plug can be removed
and the top port can be used for wiring.
WARNING: If the top conduit port is used for wiring, be sure to seal the threads to ensure
water does not enter the junction box. See “Wiring the M2A-XL Transmitter” on
page 30 for complete wiring instructions.
Junction B ox Cover
Window
Magnetic
Wand
Mounting Hole (2x)
3/4 NPT Conduit Port, Plugged
Detector
(Catalytic LEL Detector Shown)
3/4 NPT
Conduit Port
