IO Expansion Module 8DI 8DO with NPN Inputs for Control Cabinets

The BM10-0808N is an IO Expansion Module 8DI 8DO built for control panels where the controller needs a few extra discrete points without a second node. It adds eight digital inputs and eight digital outputs to the host system over a high-speed backplane bus, powered from a standard 24 VDC supply, and is aimed at machine builders who value compact size and fast installation.

Compact 8-in/8-out Expansion

The module expands a controller by 8 digital inputs and 8 digital outputs, wired to a 24 VDC supply. Input signal type is NPN, matching common sinking sensors in industrial panels, so existing sensor wiring can be reused without additional converters.

Backplane and Mounting

A high-speed backplane bus carries the module’s data to the controller. Its compact size and lightweight plastic housing install easily inside electrical cabinets, and a snap-fit design lets expansion modules connect without tools.

Wiring and Maintenance

Quick-connect bayonet I/O terminals allow cables to be released and re-seated fast, simplifying servicing and reconfiguration during line changes. This reduces downtime when a sensor or actuator must be swapped at short notice.

Key Specifications

• Power supply: 24 VDC
• DI signal type: NPN
• Digital inputs: 8
• Digital outputs: 8
• Bus: high-speed backplane
• Mounting: snap-fit / bayonet

Typical Deployment Scenarios

The module caters to a wide range of automation requirements in factory automation, robotics, packaging, CNC machine tools, semiconductor, inspection and material handling. On a robotic workcell it adds gripper and tool sensors; in packaging it extends the count of photoelectric inputs and valve outputs without re-engineering the main controller.

Selection Notes

Verify that the host controller supports the BM10 backplane interface and that the NPN input logic matches your field sensors. Because the module is mounted inside the cabinet, keep cable lengths to the field devices within standard limits and use strain relief at the bayonet terminals. Lyenwsin can confirm compatibility with your controller model before ordering.