20 Pelco Manual C1941M (7/98)
4.3 DAISY-CHAINING
Up to eleven VCRCs may be daisy-chained together. This enables the system to
suppor t up to 700 VCRs. Figure 15 illustrates the required wir ing connections for
daisy-chaining.
Note that the remarks made in the previous section regarding RS-422 wiring run
distances also applies here when considering cables distance runs between daisy-
chained units.
Since the VCRC units utilize the same protocol as that f or GPIs, they can be bussed
together with CM9760-IRCs, and in the future with CM9760-RELs. Figure 16 illus-
trates this configuration.
Figure 16. Daisy-Chain Multi-Buss Configuration
Figure 15. Daisy-Chain Configuration
ANY OF THE ELEVEN UNITS REFERENCED BELOW CAN BE ASSIGNED ANY OF THE 11 FRAME
ADDRESS RANGES AVAILABLE. FRAME ADDRESSES DO NOT HAVE TO BE SEQUENTIAL. THIS
MEANS UNIT 11 IN THE DIAGRAM BELOW, FOR EXAMPLE, CAN BE ASSIGNED FRAME ADDRESS 2,
WHILE UNIT 3 IS ASSIGNED FRAME ADDRESS 10.
CM9760-IRC CM9760-REL