Converter creates time proportional output from 4-20 mA signal

Device from Athena Controls can drive temperature or process directly from sensor.
By Control Engineering Staff June 18, 2009

Device connects to a solid-state relay.
New APWM Series pulse control converter from Athena Controls mounts directly to a 3-32 Vdc SSR (solid state relay) to drive a process or temperature controller generating a time proportional output from a 4-20 mA signal.

The converter supports single- or three-phase operation, 50 or 60 Hz, and tolerates inputs less than 4 mA. Lever clamps are provided on the converter for the 4-20 mA input and the SSR’s power section provides easy connection to the line and load.

Read more on time proportional control strategy .

—Edited by Peter Welander, process industries editor, PWelander@cfemedia.com ,
Control Engineering Process Instrumentation & Sensors Monthly
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