Schneider Electric RM22UA32MR Harmony Voltage Control Relay 8A 2CO 1-100V AC/DC 24-240V Control Relay

The Schneider Electric RM22UA32MR is a Harmony RM22-UA single-phase voltage control relay, measuring a 1-100 V AC/DC signal for overvoltage or undervoltage conditions in window mode while powered from a 24-240 V AC/DC supply. It switches two 8 A changeover contacts in a 22.5 mm wide DIN rail housing with a front diagnostic button.

Technical Specifications

Certifications & Standards

• GL
• UL
• CCC
• EAC
• CE
• RCM
• CSA
• IEC 60255-1

Selection Notes

The 1-100 V measurement range on RM22UA32MR suits low-voltage sensor or transformer secondary signals directly, without the external voltage divider a mains-range relay would need. Where the signal to monitor runs up to 500 V instead, the RM22UA33MR sibling in the same 22.5 mm housing covers 15-500 V without changing the 24-240 V AC/DC supply or the 2 C/O 8 A output rating, so the two parts are interchangeable on an existing panel footprint depending only on the signal range needed. Reliability data rates the RM22UA family at B10d = 290,000 operations and an MTTFd of 308.2 years, consistent across the 1-100 V and 15-500 V measurement-range variants since the output stage and mechanical contacts are shared hardware. The front test button exercises both output contacts without needing to force an actual overvoltage or undervoltage condition on the live measurement input, which speeds up commissioning checks on a new panel build.