Interfaces to 100 Ohm Platinum or 120 Ohm Nickel RTDs
Linearises RTD Signal
3Hz Signal Bandwidth
Industry Standard Output of either 0-10V, 0-20mA, or 4-20mA
1500Vrms Transformer Isolation
ANSI/IEEE C37.90.1 Transient Protection
Input Protected to 240VAC Continuous
True 3-Way Isolation
Wide Range of Supply Voltage
160dB CMR
85dB NMR at 60Hz, 80dB at 50Hz
±0.08% Accuracy
±0.025% Conformity
Easily Mounts on Standard DIN Rail
C-UL-US Listed
CE and ATEX Compliant
Each DSCA34 linearized 2- or 3-wire RTD input module provides a single channel of RTD input which is filtered, isolated, amplified, linearized, and converted to a high-level voltage output. Signal filtering is accomplished with a five-pole filter which provides 85dB of normal-mode rejection at 60Hz and 80dB at 50Hz. An anti-aliasing pole is located on the field side of the isolation barrier, and 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.