PHW designs and builds Relay Calibration Units to allow customers to perform simple Go/No-Go testing of a variety of industry standard relays. The computer-controlled test bench provides for complete test control and automatic test documentation.

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PHW Code Rate Generators / Decoders offer solid state designs that replace older relays. They handle multiple code rates (50, 75, 120, 180, 270, 420).

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Vital Loss of Shunt Timer:
> Solid-state timer to delay pickup of track repeater relay.
> Field or factory adjustable run times.
> No field maintenance required.
> Voltage range: 8 to 16VDC.
> Temp range: -40° to 70° C.
> Timing range: 1 sec. to 99 min., 99 sec.

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