4.11.1. MotionLinx-Ai

Power Connection

Power connector is Degson DG245-5.0, 12 AWG (3.31 mm ²) Max wire size, 5-6 mm strip length

Electrical and Environmental Ratings

!Operating outside these parameters may result in permanent MotionLinx-Ai failure or unexpected device behavior

*This is the maximum current that will be allowed by the hardware over current protection circuitry. On board firmware limits the amount of current based on the quantity and motor types connected

Sensor Port I/O

Each MotionLinx-Ai module is equipped with two 4-pin female M8 style Sensor I/O ports primarily used to connect a photo-electric sensor to the module. Each of these ports has one pin dedicated as an input for the sensor (Pin 4) and one Aux I/O pin (Ppin 2) that is configurable to be either an input or an output.

Input Signals

For the MotionLinx-Ai module, this applies to each Sensor Port’s Pin 4 signal and to the Pin 2 signal when configured as an Input. Pins configured as Inputs are by default auto-sensing for PNP or NPN circuit type such that both sourcing and sinking current will activate the input based upon the following conditions:

Output Signals Aux I/O Signal (Pin 2) when configured as an OUTPUT

For the MotionLinx-Ai module, this applies to each Sensor Port’s Pin 2 signal when configured as an Output. Pin 2 only provides an NPN circuit as illustrated below.

Sensor Port 24VDC (Pin 1) and GND (Pin 3)

Pin 1 of each Sensor Port provides 24V for powering up an input device (such as a sensor) and/or for supplying the load when Pin 2 is configured as an output. The available current for the two control ports on the module is limited internally by a solid-state fuse. The maximum combined current consumption for the two sensor ports is 100 mA.

!Current in excess of 100mA drawn from the sensor port’s 24V pin may cause permanent damage to the sensor detection circuit. Care should be taken to avoid excess loads, short circuits and miss-wiring of the sensor port.

Motor Port

• The PWM frequency is firmware version dependent

!**During normal operation as an MDR port, the internal protection circuitry is not capable of detecting a short-circuit between a BLDC coil output and ground. Such a short-circuit will cause damage to the high-side bridge transistors. When operating these outputs as general purpose outputs, the high-side transistors are disabled, so a pin-to-ground short-circuit is not an issue

Motor Ports in Digital Output Mode

Either the Left or Right (or both) Motor Ports can be configured to operate their respective motor coil output transistors as 24V DC digital output signals. These digital output signals are sinking type only and will accommodate up to 1A on a given output pin, but restricted to a total of 1.5A for both pins on a given port.

For each of the Motor Ports, only 2 out of the 3 total motor coil output pins are available as digital outputs for a total of 4 Motor Port digital outputs available per module. Please note that these 2 available motor coil pins are different between the Left and Right Motor Ports as illustrated: