2800 Laura Lane Madison, WI 53562 | 800.288.9383 Fax: 608.836.9044 | www.tcsbasys.com
8
WIRING
DIAGRAM (US4040)
1
3
5
2
4
6
7
For communication wiring, use
3-conductor, twisted/shielded 22 AWG.
24 VAC transformer. See powering
instructions.
Control signals may be up to nominal 28
VAC from equipment transformer.
Dry contact. Must not be powered.
GND terminal is used for self powered 4-20mA
inputs and outputs.
For sensor input wiring, use
2-conductor, twisted/shielded 18 AWG.
4-20mA transmitter, sensor input wiring 18
AWG, twisted, shielded pair. AI1 is shown as
Self-Powered sensor. This input can be used
for either 2-wire or self powered.
8
4-20 mA output 600 ohm max. Do not power
actuator with power from the thermostat. The
thermostats are half-wave recti
fi
ed, whereby
the power ground is common with the signal
ground.
Figure 1b
US4040
Unused terminal on this model.
9
