Legrand Lexic RMS Power Relay Module

The Legrand Lexic RMS (Remote Modular Switch) Power Relay Module is a DIN-rail mounted remotely controlled switching device designed for intelligent load management, energy metering, and controlled disconnection of circuits within residential, commercial, and light industrial distribution boards. The 412230 model is rated 63 A at 230/400 V AC and features a 1-module DIN rail form factor that mounts directly alongside miniature circuit breakers (MCBs) in standard 18 mm pitch DIN-rail enclosures without additional mounting hardware. The device accepts both 12 V DC and 230 V AC coil control voltages, making it compatible with a wide range of automation controllers, time switches, and PLC digital outputs — a flexibility that is valuable on Saudi projects where existing control infrastructure varies between sites. The integrated manual override button allows maintenance personnel to operate the relay locally without powering the control circuit, ensuring continued operation during SCADA or BMS controller maintenance windows.

From a technical standpoint the RMS relay provides a maintained contact output — meaning the relay holds its last commanded state even after a power interruption, preventing unexpected reconnection of loads after a supply restoration event that could cause safety issues on HVAC or process equipment. The device is rated for 10,000 electrical operations at rated current, exceeding the design life of most 25-year building lifecycles under normal switching frequency. An LED status indicator on the front face of the module shows the current open/closed state, visible through a standard DIN rail enclosure door window for quick visual inspection during routine maintenance rounds. The contact resistance is specified below 1 mΩ to ensure that the relay introduces negligible voltage drop even at full 63 A continuous load current, which is important on long distribution circuits in large Saudi commercial buildings.

In the KSA market the Lexic RMS relay is widely deployed in smart electricity metering cabinets by the Saudi Electricity Company (SEC), where it serves as the controlled disconnection device for pre-paid and managed electricity accounts in apartment buildings and commercial centres across Riyadh, Jeddah, and Dammam. Building management system integrators use the RMS to implement time-based load shedding on non-critical circuits — parking lighting, exterior signage, and non-essential HVAC zones — to comply with SEC demand-side management (DSM) programmes that incentivise large consumers to reduce peak demand. The relay is also widely used in photovoltaic (PV) system distribution boards on Saudi rooftop solar projects, where it provides remotely controlled grid connection and disconnection managed by the solar inverter's control output.

Razz Middle East stocks the Legrand Lexic RMS 412230 in common configurations and supplies the full Lexic range including time switch, impulse relay, and tariff change-over relay variants. Our team can advise on selecting the correct coil voltage variant for compatibility with specific BMS platforms, and we supply wiring diagrams, BMS integration notes, and SASO compliance documentation as standard with each order. Pricing is in SAR with delivery throughout Saudi Arabia from our regional warehouse.