The Siemens SIRIUS 3RS7003-1DE00 is a single-range signal converter that takes a 4-20 mA input and reproduces it as a 4-20 mA output, with galvanic isolation between input and output. It is an active design, meaning it requires a 24 V AC/DC supply (rated at 50/60 Hz) to power the loop. The converter draws 0.29 W and handles a voltage ripple up to 20 mV. Temperature drift is specified at 0.015 %/°C, which keeps the signal stable across the -25 to +60 °C operating range.
The 3RS7003-1DE00 snaps onto a DIN rail (snap-on mounting) and occupies just 6.2 mm of width — one of the narrowest footprints in the SIRIUS signal-converter family. Height is 93 mm, depth 72.5 mm. This makes it straightforward to slot into a crowded panel without worrying about ventilation gaps or access for wiring.
Wiring and connections
Wiring terminals accept solid or stranded conductors from 20 AWG to 14 AWG (1 x 20...14). The input and output are both 4-20 mA loops, and the unit provides galvanic isolation between input and output (but not between the two inputs or between the two outputs — it is a single-channel device). The rise time is 6 ms, and the limit frequency is 30 Hz, so it is suited for DC process signals, not fast pulsed or AC waveforms. An LED display version is built in, giving local indication of the signal status.