| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | 70RCK16 | Grayhill | Rack 16 Channel 32 Pin For Use With System 50 Style Controllers |
 | 70RCK4 | Grayhill | Racks 4 Channel, Negative True Logic |
 | 70RCK8 | Grayhill | Racks 8 Channel For Use With System 50 Style Controllers |
 | C4IDC | Crydom | I/O Module Relays Input Module 20mA 4000VAC Thru-Hole/Plug-In |
 | 70RCK24 | Grayhill | Racks 48-Pin For Use With System 50 Style Controllers |
 | 70GRCK8-HL | Grayhill | Standard Racks 8 Channel DIN Rail Mount |
No Image | G4ODC5A | Opto 22 | I/O Module Relays Output Module 4000VAC Thru-Hole/Plug-In |
 | CJ1W-OD211 | Omron | 16-Output I/O Relay Module, DIN Rail Mount, 500mA |
 | OAC5A5 | Opto 22 | I/O Module Relays Output Module 4000Vrms Thru-Hole/Plug-In |
 | SNAP-AIMA | Opto 22 | I/O Module Relays Input Module 20mA DIN Rail |
 | DA8 | Opto 22 | I/O Module Relays Output Module 4000Vrms |
 | SNAP-ODC5SRC | Opto 22 | I/O Module Relays Output Module 4000V |
 | SNAP-AIMA-8 | Opto 22 | I/O Module Relays Input Module 20mA 1500V Thru-Hole/Plug-In |
 | SNAP-AIMA-I | Opto 22 | I/O Module Relays Input Module 20mA DIN Rail |
 | FC4A-J4CN1 | Idec | I/O Module Relays Input Module 20mA DIN Rail |
No Image | OD24 | Altech | I/O Module Relays Output Module 24VDC-IN 10mA 3500V DIN Rail |
No Image | OA05 | Altech | I/O Module Relays Output Module 5VDC-IN 10mA 3500V DIN Rail |
No Image | OA24 | Altech | I/O Module Relays Output Module 24VDC-IN 10mA 3500V DIN Rail |
No Image | OD15 | Altech | I/O Module Relays Output Module 15VDC-IN 10mA 3500V DIN Rail |
No Image | OD05 | Altech | I/O Module Relays Output Module 5VDC-IN 10mA 3500V DIN Rail |
