The Omron CRT1-ID16SY-1 is a 16-point digital input module in the CRT1 remote I/O series. It takes 16 discrete signals from field devices like limit switches or proximity sensors and passes them back to the controller over the CRT1 backplane bus.
Where It Fits
This module mounts on a CRT1 slice I/O rack. It's used in distributed layouts where you need a local input bank near the machine rather than pulling every wire back to a central PLC cabinet. The CRT1 series is common in Omron Sysmac and CJ/CS setups for mid-size lines.