Cecomp Electronics, APD 1520, Dual Alarm Trip for 1 to 4 Sensor, 85-265 VAC, 60-300 VDC PowerFeatures with all optional accessories:User adjustable setpoint(s)User adjustable deadband(s)8 Amp SPDT contactsInput LoopTracker LEDAlarm status LEDsAlarm options: LO, HI/HI, LO/LO, band alarmOptional reverse actingOptional latching alarmsPush to test/resetRemote push to test/resetFull I/O/power isolationRemovable plugsDIN rail mount without toolsFactory Set Input Range and ExcitationAlarm Test, Optional Reset ButtonApplications:Load Cell Weighing Systems and ScalesStrain Gauge Pressure Sensors and TransducersTanks, Scales, Extruder Melt Pressure, Crane LoadsThe APD 1520 accept a strain gauge, bridge, or load cell input and provide a visual alarm indication and alarm relay contact outputs. The input is factory configured to a specific excitation voltage and millivolt input range. The input can be configured as zero-based (i.e., 0 to 20 mV), bipolar (i.e., -30 to +30 mV) for push-pull applications, or offset (i.e., 5 to 33 mV) to electronically compensate for deadweights (tare). The alarm types are factory configured. Front-accessible potentiometers are used to adjust alarm setpoint and deadband.LoopTracker and Alarm Status LEDsAPI exclusive features include a LoopTracker LED that varies in intensity with changes in the process input signal. A two red/green bi-color alarm status LED visually indicate alarm status. These LEDs provide a quick visual picture of your process at all times.Output Test / UnlatchAPI's exclusive Output Test button can be used to verify the alarm and system operation and also provides the additional function of unlatching the alarm when the latching option has been ordered. This feature can be remotely operated. The output test button greatly aids in saving time during initial startup and/or troubleshooting.