Product Description:

The X67SM4320 is a remote stepper-motor module from B & R Automation within the X67 Analog Input Output Modules series. It combines motor power electronics and fieldbus interfacing in an IP67 housing so it can be mounted directly on machinery without a control cabinet. By driving up to four 2-phase bipolar steppers, the unit provides distributed positioning capability for packaging, material-handling, or small gantry axes that require closed-loop coordination over the X2X real-time network.

Each axis is modulated by a controller clocked at 38.5 kHz, allowing microstepping down to 256 microsteps per full step for smoother motion and reduced vibration. Power is supplied from a 24 VDC bus, and an internal capacitor bank rated at 440 µF buffers line drops during peak demand. The module can source a combined load of 6 A, while its aluminum casting and molded seal maintain an IP67 ingress rating against fluids and dust. Motor outputs are routed through M12 A-coded connectors, and the four steppers share an M8 4-pin inlet for I/O supply distribution. Nominal drive current is 1 A per phase, matching common NEMA-17 and NEMA-23 frame coils. The embedded electronics draw 2 W of internal I/O power, and the X2X backbone is linked through an M12 B-coded pass-through so multiple modules can be daisy-chained.

Dynamic loads can be accommodated because each channel delivers up to 1.5 A peak for acceleration without oversizing the external fuse. Current resolution is maintained within 1%, enabling repeatable torque scaling across the microstep table. Network overhead remains low because the X2X transceiver consumes only 0.75 W, which limits heat rise inside the sealed enclosure. This arrangement helps keep the module suitable for moving carriages or compact frames without requiring separate cooling hardware.