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Item#: 9SIC6WMKY22243

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Main image of Compact Size 4*DI, 4*DO IO Extender Modular IO Controller Easy to Expand and Maintain DIN-Rail mounting and Wall mounting Achieve Different IO Quantity Combinations USR-IO4040

Alt view image 2 of 7 - Compact Size 4*DI, 4*DO IO Extender Modular IO Controller Easy to Expand and Maintain DIN-Rail mounting and Wall mounting Achieve Different IO Quantity Combinations USR-IO4040

Alt view image 3 of 7 - Compact Size 4*DI, 4*DO IO Extender Modular IO Controller Easy to Expand and Maintain DIN-Rail mounting and Wall mounting Achieve Different IO Quantity Combinations USR-IO4040

Alt view image 4 of 7 - Compact Size 4*DI, 4*DO IO Extender Modular IO Controller Easy to Expand and Maintain DIN-Rail mounting and Wall mounting Achieve Different IO Quantity Combinations USR-IO4040

Alt view image 5 of 7 - Compact Size 4*DI, 4*DO IO Extender Modular IO Controller Easy to Expand and Maintain DIN-Rail mounting and Wall mounting Achieve Different IO Quantity Combinations USR-IO4040

Alt view image 6 of 7 - Compact Size 4*DI, 4*DO IO Extender Modular IO Controller Easy to Expand and Maintain DIN-Rail mounting and Wall mounting Achieve Different IO Quantity Combinations USR-IO4040

Alt view image 7 of 7 - Compact Size 4*DI, 4*DO IO Extender Modular IO Controller Easy to Expand and Maintain DIN-Rail mounting and Wall mounting Achieve Different IO Quantity Combinations USR-IO4040

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Compact Size 4DI, 4DO IO Extender Modular IO Controller Easy to Expand and Maintain DIN-Rail mounting and Wall mounting Achieve Different IO Quantity Combinations USR-IO4040

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PUSR provides 5 different models of expansion units for users to choose from, please see the table for specific differences between different modules.
The USR-IO modular controller supports standard Modbus RTU for data acquisition and control, making integration into control systems extremely straightforward.
Industrial Grade Design EMC Protection: Level 3, IEC 61000 Wide Operating Temp: -25~+75 Hardware Watchdog: Supported
Flame retardant rating: V0, burning stops within 10 seconds on a vertical part allowing for drops of plastic that are not inflames.

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PUSR provides 5 different models of expansion units for users to choose from, please see the table for specific differences between different modules.
The USR-IO modular controller supports standard Modbus RTU for data acquisition and control, making integration into control systems extremely straightforward.
Industrial Grade Design EMC Protection: Level 3, IEC 61000 Wide Operating Temp: -25~+75 Hardware Watchdog: Supported
Flame retardant rating: V0, burning stops within 10 seconds on a vertical part allowing for drops of plastic that are not inflames.

Additional Information
First Listed on Newegg	May 30, 2026

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Return for refund within: 30 days
Return for replacement within: non-replaceable
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Item#: 9SIC6WMKY22243