Johnson Controls UNT110-1 - Page 27

UNT Controller—Unitary (UNT) Controller
27
Table 8: UNT140/141 Terminal Identification
Terminal Description
AI1
Analog Input 1
A COM
Analog Input Common
AI2
Analog Input 2
AI3
Analog Input 3
A COM
Analog Input Common
AI4
Analog Input 4
AI5
Analog Input 5
A COM
Analog Input Common
AI6
Analog Input 6
+15 VDC
+15 Volts DC Supply
BI1
Binary Input 1
24 VAC
24 Volts AC
BI2
Binary Input 2
BI3
Binary Input 3
24 VAC
24 Volts AC
BI4
Binary Input 4
TRIAC
Shared Triacs Node
BO1
Binary Output 1
RTN
Return (24 VAC or Common)*
BO2
Binary Output 2
BO3
Binary Output 3
RTN
Return (24 VAC or Common)*
BO4
Binary Output 4
BO5
Binary Output 5
RTN
Return (24 VAC or Common)*
BO6
Binary Output 6
BO7 or AO1
Binary Output 7 or Analog Output 1
RTN or A COM
Return (24 VAC or Common)* or Analog Output Common
BO8 or AO2
Binary Output 8 or Analog Output 2
24 VAC
24 VAC Power--Transformer High Side
COM
Common--Transformer Low Side
Z Bus
Zone Bus
REF
N2 Reference
N2-
N2 Bus -
N2+
N2 Bus +
* Depends on triac switching jumper setting: If high, return is “Common.”
If low, return is “24 VAC.”