The Omron CS1W-DA08C, also cataloged as the CS1W-DA08C Analog Output Module, operates as a dedicated hardware component for digital-to-analog signal conversion within Omron CS1 PLC backplane architectures.

Model Suffix Identifier Map

• CS1W Class Designation: Identifies high-density expansion module hardware compatible with CS1 series CPU racks and expansion base units.
• DA Signal Type: Indicates dedicated digital-to-analog conversion circuitry for continuous current output control loops.
• 08 Channel Count: Specifies 8 independent analog output channels hosted on a single front terminal block interface.
• C Output Range Variant: Designates standardized 4-20 mA current loop signal ranges with 1/4000 conversion resolution.

Module Specifications

Backplane Integration and Execution Velocity

The module relies on backplane bus communication velocity to process cyclic data transfers from the CPU without introducing instruction overhead. High firmware flash compatibility allows seamless setup in multi-rack topologies, maintaining precise output updates across all 8 channels during dynamic I/O density scaling operations.

Shipping Package Content

• 1 x Omron CS1W-DA08C Analog Output Module
• 1 x Removable Terminal Block Assembly
• 1 x Protective Connector Cover

Installation and Wiring Protocol

• Main Power Removal: Shut off all power to the rack base unit before attaching or removing the module from the backplane.
• Shielded Cabling: Connect analog current output loops using twisted-pair shielded wire to suppress field electromagnetic interference.
• Ground Reference: Terminate cable shielding at a single ground point near the panel earth bar to avoid ground potential loops.
• External DC Wiring: Verify correct polarity of the required external 24 VDC field power supply on the terminal block.

Technical FAQ

• Can the CS1W-DA08C be hot-swapped while the CS1 backplane is powered?

  No, removing or inserting the unit while the rack power supply is energized will damage internal circuits and fault the CPU.

• What external power source is required to drive the analog current loops?

  An external 24 VDC power supply must be connected to the module terminal block to supply loop current for all 8 channels.

• How does the module react if the 24 VDC external power supply drops out?

  The module triggers an external power error flag, and all 8 analog output current loops drop to 0 mA or preset safe states.

• Is channel-to-channel isolation supported on this analog output unit?

  No, channels share a common ground; optical isolation exists only between the backplane bus logic and the field outputs.

• What current load resistance limit applies to each 4-20 mA output channel?

  Each channel supports an allowable external loop load resistance ranging from 0 ohms up to a maximum of 600 ohms.

• How are output conversion values represented in the CPU memory allocation?

  Digital values are mapped as binary data in allocated CIO words, scaling from 0000 to 0FA0 hex for 4-20 mA outputs.

• Does network traffic on adjacent communication modules delay analog updates?

  No, data exchange across the backplane bus occurs asynchronously without latency from external Ethernet or fieldbus traffic.

• What cable preparation is recommended for the removable terminal block?

  Use stranded copper wire with crimped ferrules and tighten terminal screws to a torque spec of 0.5 N m.