Relay module board with opto isolation for microcontroller

Channel Interface Relay Module Rail Panel Mount Automation PLC Board, FY-T738C

3.3V Relays Module For PLC Home Auto Control Powerful Switching LED Lights

Automation Direct D2-08TR Direct Logic Relay PLC Output Module

Rockwell Allen Bradley Micrologix PLC 1762-OW8 8-Point Relay Output Module Ser A

1756-OW16I AB ControlLogix Digital Relay Module PLC New factory Sealed 1756OW16I

KL2602 Beckhoff PLC Slice I/O 2-Channel Relay Output Terminal Module Card

8 Channel High Sensitivity Solid Relays Module PLC Driver DC5V 12V 24V