Description

The IS220PSFDH1A is a Flame Detector Power Supply pack.This pack usually mounts above the TRPG (gas turbine trip protection) terminal board.Source power for this pack comes from the power distribution board (JPDL) and is 28 Vdc.The output from this pack is rated for 335 Vdc, 5 mA. Output voltage can be monitored locally using a differential pair of test points.The pack has no jumpers or hardware settings on the board. The input circuit breaker provides inrush current protection and overcurrent protection.The output limiter restricts output current to 7 mA. A 385V MOV (metal oxide varistor) provides transient protection at the output. The IS220PSFDH1A is built within a closed case with a front faceplate that includes three diagnostic LEDs.These are labeled Current Lim,” P335 Out,” and P28 In.” The first of these is a red LED, the other two are green.The faceplate also has an infrared port. This is not used. The pack is cooled by convection and does not use any kind of cooling fan.Its ambient temperature range of us is -30 to +65 Celsius. When installing theIS220PSFDH1A, it is important to turn off power to the pack and test to verify no power exists on the module before touching the pack or any connected circuits.The IS220PSFDH1A should be secured using threaded studs located on the side of the housing. More information about the IS220PSFDH1A, its uses, installation, and operation of the pack may be found in user guides and manuals from the manufacturer.