DC Input Isolated Field Rangeable Two Wire Transmitter Model SR2101
The SR2101 is a low-cost, reliable, DC input two-wire transmitter for field or panel mounting in various industrial housings and enclosures. It provides a DC output current (4/20 mA) proportional to a voltage or current input. The output is galvanically isolated from the input.
The SR2101 includes filtering and conditioning to reduce susceptibility to transients and noisy operations. It uses a feedback VCO to develop a pulse train with a duty cycle proportional to the input signal amplitude. This pulse train is coupled through a pulse transformer to the output circuitry, where the duty cycle data is converted to a proportional 4/20 mADC output level. A plug-in range card permits user ranging to the required voltage or current input range. The output ZERO and SPAN controls are accessible through the top of the case. Zero is adjustable ± 20% and span +5/-55%. Terminations are made to screw terminal connectors on top of the case.
Test points located on the SR2101 front panel allow monitoring of loop current value, using a milliammeter, without breaking the loop current.
Remote data acquisition. Voltage to current conversion and isolation. Elimination of ground loops and common mode signals.
The SR2101 can be mounted in a connection head (TSH-A6L), explosion-proof housing (XJAY), or on a flat surface using the two 4.5 mm diameter mounting holes provided. Standard 33 mm hole center spacing allows for mounting in most connection heads. The 5.08 mm center hole allows clearance for input wiring. An optional DIN-Rail mounting kit is available (DMP2000).