Installation Instructions

Document No. 550-166
Installation Instructions
October 26, 2016
Page 4 of 8 Siemens Industry, Inc.
Wiring Diagrams
Offboard Air Module Wiring.
CAUTION
The LCM-OAVS has two terminal
blocks with terminations numbered
identically (terminations 1 through 16).
DO NOT get these mixed up with
each other.
If the LCM-OAVS is not connected as
shown, it is not resistant to electrical
surges. It is also susceptible to
interference from other equipment.
CAUTION
A separate power supply is required if
a 4-20 mA sensor is used.
Failure to follow wiring precautions will
result in equipment damage.
Wiring for AI with a 4 to 20 mA Sensor.
CAUTION
Each 4-20 mA sensor requires a
SEPARATE dedicated power limited
24 Vdc power supply.
DO NOT use the same transformer to
power both the sensor and the
controller.
NOTE:
If the voltage/current switch is set to current
and a 4 to 20 mA sensor is connected to an
AI, then special wiring requirements must
be followed.
NOTE:
The controller’s DOs control 24 Vac
loads only. The maximum rating is 12 VA
for each DO. An external interposing
relay is required for any of the following:
• VA requirements higher than the
maximum
• 110 or 220 Vac requirements
• DC power requirements
• Separate transformers used to power
the load
(for example, part number 540-147,
Terminal Equipment Controller Relay
Module)