Operating instructions

AMC-DTR Sensor Transmitter User Manual
5
Modular design simplifies the installation of the AMC-DTR. A top Display Assembly is mounted
with captive thumbscrews and is easily removed to access field-wiring terminals. An optional
DTR-10-0234 Alarms/Modbus board mounts piggyback to the back of the Display Assembly.
Wiring from toxic or oxygen sensors terminates at the DTR-10-0232 Display Assembly along
with 2-wire 4-20mA signal wires. This Display Assembly is the only PC board supplied with
toxic / oxygen AMC-DTRs not requiring relays, RS-485 ModBus or LCD backlight. The optional
bottom DTR-10-0233 I/O Power Supply board generates voltages needed for LCD backlight,
relays, RS-485 ModBus and catalytic bead LEL sensor and is required with any of these I/O
functions. The enclosure is equipped with two threaded 3/4 inch NPT conduit fitting outlet and
pre-drilled mounting flanges.
WARNING:
Qualified personnel should perform the installation according to applicable electrical
codes, regulations and safety standards. Insure correct cabling and sealing fitting
practices are implemented. Install the AMC-DTR to a wall or bracket using the
predrilled mounting flanges with I.D. 0.276 on 4.96 inch centers (Figure 2). If conduit is
rigid and able to support the weight of the AMC-DTR, the mounting bolts may be
omitted.
CAUTION:
The sensor should never be installed pointing upwards.
Figure 4: Outline Drawing