UNT Controller—Unitary (UNT) Controller
91
Appendix B: UNT100/101
This section contains information specific to the discontinued
UNT100/101. To troubleshoot the UNT100/101, refer to the
Troubleshooting section of this technical bulletin.
The following list contains features of the UNT100/101 which differ from
the other UNT types.
•
No earth ground connections are allowed when wiring a
UNT100/101 series controller.
•
The N2 bus is not isolated. The secondary of the 24 VAC transformer
cannot be grounded.
•
The BIs can accept dry contacts only, not 24 VAC. They can also
accept 100 Hz as accumulator input.
•
The BO is not jumper selectable. The triac switches to the common
side of 24 VAC only.
untrm100
BINARY IN BINARY OUTPUTS
BINARY IN
ANAL OG I NPU TS
1 2 3 4 5 6 1 2 3 4
ANAL OG I NP UTS
COMMON
BI NARY COM
+15VDC
COM
PWR
IN
24V
AC
BINARY OUTPUT
24VAC TO LOADS
1 2 3 4 5 6
1 2
0-10VDC
ANALOG
OUTPUT
ANALOG
OUTPUT
COMMON
TM
OFF
1 2 3 4 5 6 7 8
AS- UN T101- 0
+
-
BINARY OUTPUTS
BINARY INANALOG INPUTS
TO ZONE STAT
ZBUS
AREF
NA+
NA-
24VAC
COMMON
24VAC
POWER
Figure 41: UNT100 Terminal Designations
What’s Different
About the
UNT100/101
UNT100/101
Terminal
Designations