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GT-4420 4-20 mA Analog Loop Surge Protection Module
Overview
The GT-4420 provides surge protection for four two wire 4-20 mA current loops powered from 24 VDC.
The 4-20 mA field inputs are terminated at 300 V barrier terminals, and are protected with a combination of series resistance, a 230 V gas tube, series inductance, and a 31 V metal oxide varistor. The protected signal lines are then available for connection to analog to digital converters, chart recorders, etcetera.
Specifications
| Mechanical | |
|---|---|
| Size: | 3" x 5" PC board |
| Mounting: | Snap track |
| Inputs | Four differential |
| Gas tube: | DC spark over voltage 230 V |
| Inductor: | 680 uH, 12.25 Ohm |
| Resistance: | 10 Ohm, 1/2 W |
| Metal oxide varistor (MOV) | |
| Maximum input working voltage: | 31 VDC |
| Maximum clamping voltage: | 79 VDC @ 51 pA for 8/20 uS |
| Peak current: | 250 A |
| Transient protection | Meets or exceeds IEEE 472.1974 surge withstand capacity (SWC) tests (ANSI C37.90a-1794) |
Consult the factory for optional voltages.
