By integrating advanced humidity and temperature sensing technology

This 3-zone control system is designed to interface with most conventional 24V programmable or non-programmable thermostats

maintaining system integrity across a wide temperature range of -50

or 15 Amps non-inductive

5" mounting base

Siemens Industrial Controls 3RA2921-1AA00 Link Module 318518-761 By integrating advanced humidity andThe Siemens 3RA2921 1AA00 Link Module provides a direct mechanical and electrical connection between SIRIUS 3RT20 contactors and 3RV20 motor starter protectors. Engineered for S0 contactors with screw terminals, this link module eliminates the need for manual wiring in the main circuit, reducing potential failure points and installation time. The unit is designed for load feeders requiring a rigid, vibration resistant bridge that maintains electrical