Johnson Controls METASYS ASC, Networking And Troubleshooting Manual

Page: 46 / 48

46 Introduction—ASC and N2 Bus Networking and Troubleshooting Guide
Table 9: Descriptions of Diagnostic LEDs on AS-CBLPRO-2
ZB LED LCP LED Normal And Fault Conditions
2 Flashes/Sec Off Connected to the Zone Bus--Normal Communication
Off 2 Flashes/Sec Connected to the LCP--Normal Communication
1 Flash/Sec Off Connected to the Zone Bus--No RS-232 Communication
or
24 VAC Shorted to Zone Bus
5 Flashes/Sec 5 Flashes/Sec 24 VAC High Side Shorted to Earth Ground
Note: Remove ground fault and cycle CBLPRO power
to eliminate this fault condition.
On Off Controller Common Shorted to Zone Bus
Off On LCP Common Shorted to LCP Data Terminal
or
Interrupted Communication
Off Off No Power or No Connection to Active Zone Bus
or
No Power or Communication for LCP
The AS-CBLCON-0 Cable Connector (Figure 21) is a cable connecting
device that accepts the different sizes of telephone cable connectors used
with the ASC products so that they are able to communicate. It also
monitors Zone Bus communications to the ASC or ZT by red and green
LEDs, described in Table 10. It has a terminal strip and a ZT download
switch.
CBLCON-1
Zone Bus (Green LED)
24 VAC (Red LED)
To Zone Terminal
6
6 6
8
8
ZO NE
SEN SO R
UNT
VAV
A HU
ZT
CB LP RO
24
VAC
COM
ZONE
BUS
ZT
NO
RM
A
L
DO
W
N
LO
A
D
To Metastat
To UNT/VAV
Figure 21: AS-CBLCON-0
Cable
Connector
Description