This document introduces the installation method and technical parameters of the GMR20 relay output module
The GMR20 is an optional relay output module for GM20 series transmitters. This guide shows how to open the transmitter cover, route the output wires, connect them to the screw terminal, install the module on the 5‑pin connectors, and close the cover.
Technical data includes default relay setpoints, measurement ranges up to 20 000 ppm, contact ratings of 50 V 0.5 A, and a one‑year guarantee for material and workmanship under normal conditions.
| Contact rating | 50 V 0.5 A |
|---|---|
| Relay setpoint range | 0 – 20 000 ppm |
| Default relay setpoint (standard) | 2000 ppm |
| Relay on thresholds | 1000, 2500, 5000, 10 000 ppm |
| Relay off thresholds | 950, 2375, 4750, 9500 ppm |