GT-4420 4-20 mA Analog Loop Surge Protection Module
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.
|Size:||3" x 5" PC board|
|Protected 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.