Analog-to-Frequency Signal Conditioner from Calex

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Calex Mfg. Co. Inc.
October 10, 2010

The Model 8505 from Calex Mfg. Co. Inc., Concord, CA, is an analog-to-frequency converter for single- or multiple-channel PLC I/O systems that converts a 4–20 mA sensor output into a PLC frequency input. The 3.78 by 1.06 by 1.65 in. module operates into the 24 V, 7 mA PLC discrete counter input and features 1–5 kHz output frequency for a 4 µA/Hz resolution, output linear to 0.01% with accuracy of better than 0.1%. The output is an isolated floating optocoupler that provides DC isolation from the input and DC power. All connections are made to screw terminals.


CompanyCalex Mfg. Co. Inc.
CountryUnited States (USA)


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