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2401 Stanwell Drive Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
1
3/2001
Models 8503, 8504
Dual Channel PLC AC and DC Detectors
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Models 8503 and 8504 Dual Channel PLC Interface modules
are designed to interface 120 Volt AC line or 24VDC signals
to the PLC 24 Volt, 7mA discrete inputs. The inputs are
isolated from the outputs by an optocoupler and the two
channels are independent. Power is supplied by the input
signal and is a nominal 10mA per channel. The output
transistor is fully floating allowing either source or sink
connection to the PLC.
MODEL 8503
MODEL 8504
MODEL 8503, 8504
SINK CONNECTION
MODEL 8503, 8504
SOURCE CONNECTION
The modules are housed in a plastic case with a built in U-
foot for mounting on standard DIN rails. The case dimensions,
excluding the U-foot are 1.65"H x 1.06"W x 3.78"L. Connections
are made to screw clamp terminals that accept wire sizes 22
to 16.
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