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4 C1518M-A (11/02)
Figure 1. Front View with Panel Removal
OVERVIEW
DESCRIPTION
The REL2064 Relay Interface Unit provides up to 64 single-pole, single-throw (SPST) dry contact outputs for direct or automatic control of
peripheral equipment. Using Pelco’s proprietary M protocol, the relay unit communicates with Pelco’s CM6800 matrix switcher via an RS-485
communication interface. The relay unit can be located remotely from the system controller and still communicate back to the central system
when an alarm occurs.
Other features include the following:
• Multiple units can be cascaded to provide multiple relay contact points on a single M port connection.
• Relay output contacts can be configured for normally open (N.O.) or normally closed (N.C.) operation.
• With the memory feature, relay groups can retain their contact position in the event of a power failure or front panel reset.
• The unit is powered by an auto-ranging power supply.
• The unit occupies one rack unit (1.75 inches or 4.45 cm), accommodating multiple types of mounting.
FRONT VIEW
The left side of the front panel includes the green power LED light. This light comes on at power-up.
The right side of the front panel includes the red data LED light. This light continually flashes on and off at a regular rate (about one-second
intervals) until the unit is online and communicating with the CM6800. Once online, the LED remains ON. If for any reason communication is
lost, the LED flashes again until communication is re-established.
When you remove the front panel, you have access to a reset button and configuration DIP switches.
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