2800 Laura Lane • Middleton, WI 53562 | 800.288.9383 | www.tcsbasys.com
55
Installation
Power
Connect the power source using 18AWG two-wire twisted, stranded copper wire.
NOTE:
Do
not connect to 120VAC. When multiple TCS/Basys Controls devices are using a single transformer, be sure to
maintain the polarity of the power wiring. All TCS devices are half-wave rectified and have common return paths.
R W1 W2
Y1 Y2 G
B/O
TC
AO1 AO2 GND
DI1
A
B
REF
+
–
24V
DI2
DI3 GND
T1
T2
T3
+P AI1
AI2 GND
+
–
+
–
24V
‘10
‘20
‘40
‘50
‘10
‘20
‘40
‘50
RS-485 Port
For communication wiring, use 22AWG three-wire twisted, stranded shielded copper wire. Must run separately.
R W1 W2
Y1 Y2 G
B/O
TC
AO1 AO2 GND
DI1
A
B
REF
+
–
24V
DI2
DI3 GND
T1
T2
T3
+P AI1
AI2 GND
A
B
REF
‘10
‘20
‘40
‘50
Optional: When used as a standalone thermostat with no communications, you can power the unit via the HVAC
unit's transformer. To do this, install a jumper connecting the "R" and "+24" terminals. The "–24" terminal must then be
connected to the common side of the unit transformer.
R
W1 W2
Y1 Y2 G
B/O
TC
AO1 AO2 GND
DI1
A
B
REF
+
–
24V
DI2
DI3 GND
T1
T2
T3
+P AI1
AI2 GND
R
R
Com
+
–
24V
Unit
Transformer
Jumper
