Technical Overview

The Omron CS1W-CIF31 is a professional-grade USB-to-serial conversion cable engineered for direct communication between Omron PLCs, Programmable Terminals (PTs), and personal computers. Designed to bridge modern USB-equipped diagnostic laptops with standard industrial RS-232C serial interfaces, it conforms to USB 2.0 specifications and supports DTE communication speeds up to 115.2 kbps. Drawing power directly from the 5 VDC USB bus, it eliminates the need for external power supplies, making it highly suitable for field diagnostics, logic programming, and parameter configuration in demanding factory environments.

Key Features

USB 2.0 Interface compliance for reliable PC connectivity [1.2].
Supports DTE communication speeds up to 115.2 kbps.
Equipped with a USB Type-A (male) computer connector and an RS-232C D-sub 9-pin (male) PLC/PT connector.
Bus-powered operation eliminates the need for an external AC/DC adapter.
Fully compatible with Omron CS, CJ, CP, C, CV, and CVM1 PLC series.
Supports NS-series/NT-series Programmable Terminals (HMI) and ZEN Programmable Relays.
Integrates seamlessly with CX-One software applications including CX-Programmer and DeviceNet Configurator.
Robust industrial operating temperature range from 0 to 55 °C.

Technical Specification Matrix

Parameter	Value
USB Specification	USB 2.0
DTE Communication Speed	115.2 kbps
Computer End Connector	USB Type-A (Male)
PLC/PT End Connector	RS-232C, D-sub 9-pin (Male)
Power Supply	USB bus powered (5 VDC from upstream)
Current Consumption	35 mA
Operating Temperature	0 to 55 °C
Operating Humidity	10% to 90% (non-condensing)
Cable Length	0.5 meters
Weight	50 g

Industrial Applications

1. Legacy PLC Upgrades and Maintenance

Field automation engineers using modern laptops (equipped only with USB ports) utilize the CS1W-CIF31 to connect directly to legacy Omron C-series or CV-series PLCs that only possess traditional RS-232C D-sub ports. This enables on-site logic updates and fault diagnosis via CX-Programmer.

Problem Solved

Bridges the hardware gap between modern USB-only PCs and legacy RS-232C serial interfaces, ensuring compatibility without risking data dropouts.

RS-232CLegacy PLCUSB 2.0CX-ProgrammerD-Sub 9-pin

2. On-Site Factory Automation Commissioning

During the initial setup of Omron CS/CJ series PLCs and NS-series HMIs on the plant floor, commissioning teams require rapid parameter configuration and logic deployment without the clutter of external power cables.

Problem Solved

Provides a reliable, bus-powered (5 VDC) connection at 115.2 kbps DTE speeds, dramatically simplifying cable routing and setup in confined electrical access panels.

CommissioningBus Powered115.2 kbpsDTE SpeedHMI Configuration

3. Mobile Diagnostic and Troubleshooting Rigs

Maintenance technicians incorporate this 50g, 0.5m adapter into their portable diagnostic toolkits to quickly interface with ZEN Programmable Relays and CP-series controllers across various production zones.

Problem Solved

Delivers a rugged, highly portable conversion link that withstands standard industrial temperatures (0 to 55 °C) and non-condensing humidity environments, ensuring constant readiness for immediate troubleshooting.

Portable Diagnostics0 to 55 °CCompact Form FactorZEN Programmable RelaySerial Conversion

Omron CS1W-CIF31 USB to RS-232C PLC Programming Cable

Omron CS1W-CIF31 USB to RS-232C PLC Programming Cable

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Legacy PLC Upgrades and Maintenance

2. On-Site Factory Automation Commissioning

3. Mobile Diagnostic and Troubleshooting Rigs