Watlow EZ-ZONE RMLA-55JJ-A1AA Limit Temperature Controller

Watlow EZ-ZONE RML Dual-Loop Limit Controller — RMLA55JJA1AA

Up for sale is a Watlow EZ-ZONE RML modular limit controller, model RMLA55JJA1AA. This is a 2-loop unit configured with universal inputs on both channels and mechanical Form C (DPDT) relay outputs — a robust safety-grade output choice well suited for over/under temperature protection in furnaces, ovens, environmental chambers, and industrial process equipment.

The RML is a dedicated limit/safety module, designed to work alongside Watlow\'s EZ-ZONE RM control modules (RMC, RMS, etc.) on a shared DIN rail backplane. It integrates seamlessly into an EZ-ZONE RM system and can be configured and monitored via Modbus RTU (RS-485) communications — included on this unit — or through Watlow\'s free EZ-ZONE Configurator software.

Only few hours of use. Pulled from a cancelled project.

Key specifications:

• Limit loops: 2 × safety limit controller with universal input (thermocouple, RTD, or process signal)
• Outputs: 2 × mechanical relay, 5A, Form C (DPDT) — one per loop
• Communications: Modbus RTU RS-485 + standard EZ-ZONE bus (always included)
• Connector style: right-angle screw terminals
• Power: 24–28 VDC (external supply required, not included)
• Mounting: DIN rail
• Certifications: UL, CSA, CE, RoHS, FM

Compatible with the full EZ-ZONE RM system family, including RMC control modules, RMA access modules, RUI/Gateway interfaces, and Watlow\'s free configuration software.