1800V Input-to-Output Isolation

1:1 Current Transfer Ratio from 1 to 20mA

Input Loop-Powered Design Eliminates Output       Power Supply

500 Ohm Output Drive, up to 10V Compliance

The T700-0001 is a loop-powered isolator that accepts a current input (typically 4-20mA). It takes its power source voltage and the output current loop drive (500 Ohm, 10V compliance, max.) from the input current loop. The 1-20mA output current follows the input current signal. Span adjustment is provided to adjust for load variations. There are two (+) output terminals. Terminal #3 is for loads less than 100 Ohms (e.g., current meter inputs) and terminal #4 is for loads greater than 100 Ohms.

The T700 is designed for installation in industrial field environments. Circuitry is enclosed in the TransPak’s rugged, diecast aluminum housing which is sealed for protection against corrosion, moisture, dust and electrical noise, such as radio frequency interference (RFI) and electromagnetic (EMI) interference. Top-mounted barrier terminal strip connections are provided. Optional mounting solutions and enclosures are also available (see Accessories).

Application
The T700 is useful in eliminating ground loop problems in existing systems, and as a preventative measure in the design of new systems. The DC current isolation allows a difference in potential of up to 1800V between the input, output signal and case ground. This isolation provides the benefits of grounded inputs without creating signal errors or ground loops.