Relay board module can be mounting on DIN rails, easy for use with PLC devices and interfaces for CNC controllers like Mach3, LinuxCNC and others. ...
Single Phase Solid State Relay Mounting Adapter for 35mm DIN Rail
Aluminum Alloy Heat Sink for Solid State SSR Relay Radiator / Heat-sink for Relays up to 20A Current
FOTEK SSR-40DA Solid State Relay 3-32V DC 40A/250V Output 24-380VAC