Many of our customers will choose our genuine Opto 22 modules (the CY series); others may specify our slim-line I/O modules due to two big advantages:
- They have a smaller case size, but a pin configuration identical to Opto 22 modules. Therefore, slim-line modules take up less room and fit in a greater variety of mounting panels--both full-size panels (such as our CYSSR 24) and panels designed for slim-line modules (including our WR PBx models).
- They cost significantly less.
Output (or power) relays use a low-level output signal from a DIO module to open or close an output power circuit that is typically rated at hundreds of volts and 1 to 5 amps. In the CyberResearch numbering system, OAC relays are AC Output relays and ODC relays are DC output relays.
Conversely, an input (or power-sensing) relay uses power-level voltages to open or close a logic-level connection to an input line on a DIO module. CyberResearch IAC relays are AC input models and IDC relays are DC input models.