FC-ERV Speed Controller

Description

Overview
The SD-622 provides relay outputs on the detection of smoke or fault conditions. The alarm output relay can be either manual or auto reset depending on application type. The SD-622 operates on the obscuration principle using infrared technology which is designed specifically to cope with the difficulty measurement conditions in air ducts, such as high velocity and levels of dirt accumulation.

Fan speed is controlled by a remote 0-10Vdc or 0-20mA signal, suitable for direct connection to BEMS or transmitters. It is equipped with Modbus RTU communications and provides a wide range of functionalities: remote control options; adjustable off level; min & max output voltage settings; time-limited motor operational initiated by a logic or switch signal.

The FC-ERV can control the speed of single-phase, voltage controllable electric motors, with a 0-10Vdc or 4-20mA control signal. Manual electronic speed control for small, single-phase motors up to 4 amps. Manual fan speed controllers provide single-phase voltage control for AC motors, by varying the supplied voltage through phaseangle control.

Features
– Volume or Velocity Reduction
– Suitable for Supply & Extract Systems
– Min & Max Speed Adjustment
– 2 or 3 Wire Fan Speed Connections
– Flow Rate Reduction on Centrifugal Pumps