3
65-2661RK-03-04 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 CO
2
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
3/4" NPT Conduit Hub
3/4" NPT Conduit
Hub, Plugged
Terminal
Strip
Magnetic
W and
M2A
Junction
Box
3/4" NPT
Conduit Hub
Detector
Junction Box
IR CO2 Detector
Calibration Adapter/
Splash Guard
W indow
3/4" NPT
Conduit Hub
Mounting Slot (2x)
