CAL25ig Isolator Self powered current loop galvanic isolator

• CAL25IG: 1 or 2 independent channels
• CAL25IG/H: Hart transparent option
• CAL25IG/3: 3 independent channels
• CAL25IG/V: dielectric strength of 2500 Vrms
• CAL25IGA: 1 channel, isolation of 2-wire transmitter
• Without auxiliary power supply
Self powered by current loop

• Excellent linearity: 0.1%
• Low response time: < 2 ms
• Small insertion loss: < 65 Ohms
• Wide range, 1:1 ratio: 0..4..10..20..50mA
• SIL2 and SIL3 option: in accordance to IEC61508

he galvanic isolators CAL25IG are designed to isolation of 0…4…20mA current loops.
No auxiliary power supply needed, there are easily integrated in existing current loops. It’s a way to eliminate
the ground loop or common mode problems.

DESCRIPTION:

– This galvanic isolators allows the copy of current loops 0 … 4 …
20 … (50) mA, without auxiliary power supply.
– Inside the device, the loop current is transform in alternative
signal and isolated via a transformer and rectified to recover its
initial value.
– This isolation mode bring a small insertion loss.
(equivalent load of 65 ohms, voltage drop: 20mA :1.3V )
– Due to its operating mode (self powered), any load insert on the
output current loop have an impact in the input current loop.

– High accuracy: +/- 0.15 %,
– Low thermal drift < 0.01 % / °C
– With its long time stability, it is not necessary to recalibrate the
device.
– NAMUR NE43 compliant
OPERATING :
Two operating mode are available :
1) Isolate an active current signal 4..20mA
(the output copy the input constrained current)
2) isolation of a 2-wire transmitter (loop powered transmitter)
(the transmitter constrained the consumed current on the output,
the isolator consumes this same current on its input)
FEATURES:
– DIN rail mounting (symmetrical or asymmetrical),
– wiring with screw terminals block
(up to 2.5mm²),
– reverse polarity protection,
– conformal coating,
– protection rating IP20