The Omron CS1W-IA111, also cataloged as the CS1W-IA111 Input Module, operates as a dedicated hardware component for 100 to 120 VAC/VDC discrete signal conversion within CS1 Series PLC system backplanes. It detects field contact state transitions and transfers digital logic status across the internal bus.

Model Designation & Architecture

• CS1W: System I/O module classification for CS1 series controller racks.
• IA: AC/DC voltage input circuit configuration.
• 111: 16-point density rating operating within the 100 to 120 VAC/VDC voltage envelope.

Technical Performance Parameters

Backplane Integration & I/O Density Scaling

The CS1W-IA111 interface board enables high-density I/O density scaling without overloading the internal power bus. Efficient signal filtering ensures fast internal backplane bus communication velocity, sending updated register states to the CPU without execution delay. Optocoupler isolation protects internal backplane logic tracks from field power surges and high-frequency line noise.

Package Component List

• 1 x Omron CS1W-IA111 Input Module
• 1 x Removable Terminal Block Assembly
• 1 x Module Wiring Diagram Label Sheet

Field Installation & Wiring Guidelines

Rack Installation

• Align module top and bottom guide rails with the selected CS1 backplane slot.
• Push the module firmly into the rack until the locking tab snaps into position.

Terminal Block Wiring

• Wire field signals to the removable terminal block using insulated spade terminals.
• Route AC supply conductors separately from low-voltage DC lines to minimize inductive interference.

Frequently Asked Questions

• What input voltage levels does the CS1W-IA111 module accept?

  The module accepts input signals rated from 100 to 120 VAC or 100 to 120 VDC across all 16 input points.

• What is the backplane current draw for this I/O card?

  The module draws a maximum current of 0.11 A from the internal 5 VDC backplane power rail.

• How many backplane address channels does the module occupy?

  The 16-point configuration occupies exactly 1 word (1CH) in the PLC memory map.

• Can the terminal block be removed without disconnecting individual field wires?

  Yes, the terminal block is fully removable to allow rapid module replacement during maintenance.

• Is hot-swapping supported for this module during active CPU operation?

  No, power to the rack backplane must be turned off before inserting or removing the I/O module.

• What is the recommended operating temperature range for panel enclosures?

  The module is designed to operate continuously within ambient temperatures from 0 to 55 deg C.

• Are individual input channels galvanically isolated from each other?

  Input points share common return lines grouped on the terminal block, while optical isolation separates field inputs from the backplane.

• What wire size should be used for terminal block connections?

  Use copper conductors ranging from AWG 22 to AWG 16 with crimped terminal lugs for secure screw clamp engagement.