Signal isolator4 – 20 mA | TRI

COMECO’s signal isolator TRI is a compact 2-wire current-to-current
transmitter providing optical isolation between the input and output current
loops. The isolation level is normally 2500 VAC, but can be increased optionally
to 4000 VAC. The TRI current isolator is an entirely passive device it does
not generate any supply voltages and does not need any additional supply
for operating. The input part is powered by the input current loop
(420 mA) and the output part is powered by the output current loop.
Thanks to the use of high sophisticated electronics for its manufacturing,
the TRI isolator offers some special features that can be activated
by the user via internal programming jumpers:
– direct (420 to 420 mA) or reversed (420 to 204 mA) conversion;
– “Low” (3 mA) or “High” (22 mA) output status at input failure;
– thermocouple non-linear conversions providing temperature linear output.
TRI is designed for mounting on a 35 mm DIN rail according to EN50022,
but it can be also enclosed in an IP65 protection box for wall mounting.

Type : signal, optical
Electrical characteristics : current