Product Description:

The 7DO135.7 digital output module is produced by B&R Automation and belongs to the System 2003 Controllers series. It provides four high-speed transistor outputs that extend a controller rack with fast switching capability for discrete actuators. Because the outputs are transistor-based, the module is suited to repetitive switching tasks where short response times matter. Within an automated cell, the module translates CPU commands into field-level signals, allowing precise on/off or pulse-width-modulated control of devices such as valves, relays, and small DC loads.

Each channel can deliver a continuous current of 0.1 A, and the push/pull FET output stage can source or sink current without external diodes. The module accepts field power from 11.4 VDC to 30 VDC, enabling operation on common 12 V and 24 V buses. Fast machine cycles are supported by a maximum switching frequency of 100 kHz, while capacitive loads up to 20 nF can be driven without excessive rise times. Pulse-width modulation is available on each channel. This allows duty-cycle control of proportional solenoids or light-dimming circuits.

Despite the high switching rate, overall power draw is only 0.2 W, which helps reduce heat buildup inside the control cabinet. Across all four channels, the shared field connector must not exceed a total load of 0.4 A. Group current sharing should be considered when multiple loads are active at the same time. When an output is energized, the drain-source path drops no more than 0.6 V at 0.1 A, helping maintain actuator voltage near the supply rail. The front housing carries an IP20 rating, so the module is intended for installation inside a closed control panel. An external sensor supply can be routed through adjacent terminals, and TPU operation is supported so the controller can generate tightly timed pulses without burdening the CPU.