48
UNT Controller—Unitary (UNT) Controller
IMPORTANT: In some cases, a computer monitor or PC will emit
electromagnetic noise that may disturb CBLPRO
communications. Therefore, do not position the
CBLPRO near the monitor or PC.
Zone Bus communications to the application specific controllers or ZT
may also be monitored with an AS-CBLCON-0. This device has red and
green LEDs whose purposes are described in Table 17.
Table 17: CBLCON LED Description
Red LED Power Green LED Comm Cause
Off Off No power to UNT
On Off Zone Bus wire open
On On Zone Bus wire shorted to common or
CBLCON-0 switch in download
position
On Blinking Normal communications
Refer to the Zone Terminal Technical Bulletin in FAN 636.3 or 1628.2 for
proper cabling between the ZT, ASC, and CBLCON.
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