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TWI-22-TB (1992) Loop Powered Isolator
Brand: Pribusin, IncThe TWI-22-TB (1992) is a loop powered current isolator which can be used in applications where loop isolation is required but power is not available and/or space is limited. The isolation is achieved via an isolation transformer. Every isolator is tested at 1500 VAC to ensure that the dielectric strength is sufficient.
The output is capable of driving a load of 700 Ohms while only an additional 1.5 Volts are dropped across the input. For example, an output loop load of 250 Ohms would result in a total input impedance of: R(load) + R(isolator), where R(isolator) = 75 Ohms
Features- High Input-Output-Power Isolation (1500Vac Test).
- Small Size - Fits on Terminal Block Rail.
- Industry Standard 4-20 mA Input.
- Industry Standard 4-20 mA Output.
- Loop-powered from Input Loop, no Additional Power Supply Required.
- Drive up to 700 Ohms on Output Loop.
- Only 1.5 Volts Loss on Input Loop.
- High Noise Rejection.
- CSA and NRTL Approved (LR 51078).
Specifications
Brand
Accuracy, Linearity
- ± 0.1 % Max., ± 0.05 % Typical
Drift at 25° C
- 24 Hours ± 0.05 % Max., ± 0.03 % Typical, 30 Days ± 0.1 %Max., ± 0.05 % Typical
Input
- 4-20 mA
Isolation
- 1500 Vac Input-Output-Chassis (Test)
Loop Loss
- 1.5 Vdc
Operating Temperature
- -40° to + 50° C
Output
- 4-20 mA
Response Time
- 10 milliseconds to 63 % of Final Value, 40 milliseconds to 99 % of Final Value
Temperature Effects
- ± 0.5 % Max., ± 0.2 % Typical for 40° C Change