- Insulated isolation amplifier for voltage signals
- Measuring ranges from 1V to 40V
- Industry Standard Output of either 0 to 10V/±10V, 0 to 20mA, or 4 to 20mA
- 3Hz Bandwidth
- True 3-Way Isolation
- Supply voltage range 15 VDC to 30 VDC
- Extended temperature range -40°C to 80°C
- ±0.03% accuracy ; ±0.01% Linearity
- ATEX Compliant
The DSCA31 isolation amplifier provides a galvanically isolated input channel which is filtered, isolated, amplified and converted into a process output signal. The module is equipped with a five-pole filter, which ensures an optimal response behaviour. One anti-aliasing pole is located on the field side of the isolation barrier, the other four poles are on the system side. After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges.
The module output is either voltage or current. For current output models a dedicated loop supply is provided at terminal 3 (+OUT) with loop return located at terminal 4 (-OUT). The system-side load may be either floating or grounded.
Special input circuits provide protection against accidental connection of powerline voltages up to 240VAC and against transient events as defined by ANSI/ IEEE C37.90.1. Protection circuits are also present on the signal output and power input terminals to guard against transient events and power reversal. Signal and power lines are secured to the module using screw terminals which are in pluggable terminal blocks for ease of system assembly and reconfiguration.
The modules have excellent stability over time and do not require recalibration, however, zero and span settings are adjustable up to ±5% to accommodate situations where fine-tuning is desired. The adjustments are made using potentiometers located under the front panel label and are non-interactive for ease of use.