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65-2649RK-CH4-4 M2A Transmitter Operator’s Manual
Chapter 2: Description
Overview
This chapter describes the components of the M2A transmitter. The transmitter is a 4 - 20 mA type detector head.
It consists of the IR LEL detector, calibration adapter/splash guard, terminal PCB, the M2A junction box, and the
detector junction box. The two junction box configuration is intended for situations where the detector needs to
be installed at an inaccessible location. The detector junction box can be installed at the inaccessible location and
the M2A junction box can be installed in a more readily accessible area.
External Description
This section describes the junction boxes and all external components of the M2A transmitter.
Figure 1: M2A External Components
Magnetic
Wand
Terminal
Strip
3/4 NPT Conduit
Hub, Plugged
3/4 NPT Conduit Hub
IR LEL Detector
Calibration Adapter/
Splash Guard
3/4 NPT
Conduit Hub
M2A
Junction
Box
Detector
Junction Box
Mounting Slot (2x)
3/4 NPT
Conduit Hub
Window
