The PGR-2601 for control circuits from 24Vdc to 800Vdc industrial automation transport system is not grounded DC system. ? Sensitive 1-20 mA trip setting, offers a wide range of low-level protection, while 50 milliseconds to 2.5 seconds to allow quick trip relay protection? Form A and form B to ground fault tripping contact? Non- volatile (memory) memory can be kept tripping state trip? analog input for external measurement? selectable fail-safe or fail-safe mode of operation without? without calibration IEEE device number 76G See ordering information input size high 75mm (3.0 " ); width 55mm (2.2 "); deep 115mm (4.5") set the 1-20 mA trip level trip alarm time setting 0.05-2.5 seconds, often isolated relay contacts open (NO) and often closed (NC) contact point operation mode selectable fail-safe or fail-safe test button no reset button on the standard analog output selective communication standard warranty period of 5 years installation DIN, surface, panel (optional)