Terminal Identification - Honeywell TC500A Mounting Instructions

TC500A-N/TC500A-W COMMERCIAL THERMOSTAT
Accessories ordering part numbers
Table 1. Accessories Part Numbers
Decoplate-N
Decoplate-W

Terminal identification

Fig. 6. Thermostat terminal assignments
WARNING
Do NOT wire the thermostat to line voltage.
IMPORTANT
Remove R to RC jumper only for 2 transformer sys-
tems
Table 2. Terminal identification
Terminal Label
24VAC power from heating Class
R
2 transformer
24VAC common (Neutral). For 2
24VAC
transformer systems, use
C
common wire from the cooling
transformer
1 Universal input/output
UIO1
COM Common
31-00399M-02 | Rev.03-21
TC500 deco plate for NA
junction boxes
TC500 deco plate for
Global junction boxes
Connection
4
Table 2. Terminal identification (Continued)
Terminal Label
2 Universal input/output
UIO2
COM Common
1 Universal input
UI1
COM Common
2 Universal input
UI2
COM Common
Sylk bus, master, power output
Sylk
Sylk bus, master, power output
BACnet Communications
+
(coming soon)
RS485
BACnet Communications
_
(coming soon)
Jumper between R and RC for
single transformer system,
R-RC
remove the jumper in two
transformer system.
24VAC power from cooling Class
RC
2 transformer
G Fan
Relay output, Compressor
Y1
contactor (stage1)
Relay output, Compressor
Y2
contactor (stage2)
24VAC
Relay output, Compressor
Y3 contactor (stage3)/Configurable
Output
W1 Relay output, Heat (stage1)
W2 Relay output, Heat (stage2)
Relay output, Heat
W3
(stage3)/Configurable Output
Relay dry contact, Aux-1
Aux
Relay dry contact, Aux-2
Connection