MOXA CP-104UL 4 Port RS-232 Universal Low Profile PCI Communication Board

Opto 22 005131C Circuit Board for Digital Interface 24 Channel I/O Mounting

Opto 22 G4PB16 I/O Module Rack Fuse Terminal Strip 16-Channel Control Board

OPTO 22 PB8 0002012-U I/O BACKPLANBE BOARD WITH 6 I/O MODULES See Pics

OPTO 22 RELAY CIRCUIT BOARD PB24 W/ MODULES **WARRANTY INCLUDED**

Opto 22 001828H Circuit Board Module – Industrial I/O Control PCB *USED*

Opto22 Odc5 Module Solid State Relay

Opto 22 PB32HQ & 001788L Solid State Relay/PCB Circuit Board And Expansion Board