Telemecanique – RM3TG201MS7 – 3‑Phase Supply/Failure Safety Relay, 220–500 VAC

The RM3TG201MS7 (also known as RM3 TG2) is a discontinued safety relay from Telemecanique/Square D, designed to monitor three-phase power supply integrity between 220 and 500 VAC at 50/60 Hz. It detects phase loss, imbalance, or sequence errors and protects sensitive machinery by switching outputs only when all monitored conditions are satisfied.

 Key Features

• Model / P/N: RM3TG201MS7 (RM3 TG2 series)  

• Supply Voltage: 220–500 VAC (50/60 Hz) across three phases L1, L2, L3

• Function: Monitors phase presence, rotation (sequence), and under-voltage; blocks outputs on fault

• Contacts: Integrated relay outputs rated AC‑15: 4 A @ 250 VAC, or general-use 4 A @ 250 VAC  

• Indicators: LED shows presence of full three-phase supply (“U” indicator)  

• Form Factor: Slim 22.5 mm DIN-rail housing; plug-in or screw-terminal versions

• Approvals: Certified to UL, CSA, CE, and VDE standards