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4 Pelco Manual C538M-A (3/04)
2.0 DESCRIPTION
The CM9760-REL Relay Interface Unit is an optional accessory of the System 9760
®
.
The relay interface unit provides dry contact switching for direct or automatic con-
trol of peripheral equipment. The unit connects to any RS-422 COMM port on the
rear of the CM9760-CC1.
Some of the more important features of the CM9760-REL are as follows:
• Each unit provides up to 64 single-pole, single-throw (SPST) contact outputs
for operating different peripheral equipment.
• Relay output contacts may be configured for N/O (factory default) or N/C op-
eration.
• With a handy “memory” feature, relay groups can retain or hold their pre-power
loss contact position in the event of a power failure or front panel reset.
• Multiple units may be cascaded to extend the number of relay contact outputs
controlled from a single port on the CC1 (over 5,000 relay outputs can be
configured).
• The relay unit may be remotely placed up to 4,000 feet (1,219.2 meters) from
the controller (RS-422 operation).
• The unit is powered by an auto-ranging power supply.
• The unit is a unique, one rack unit chassis (1.75 inches or 4.45 cm) accommo-
dating multiple types of mounting.
2.1 MODELS
CM9760-REL Single relay unit capable of controlling up to 64 relay contact
outputs per unit. (CE)