Depending on your requirements up to 3 motor drivers are integrated into the ACU-ODU. These are DC power drivers with power rating of 15A. The standard version has a voltage rating of 35VDC, an extended version for 48VDC is available on demand. The standard power supply integrated into the sat-nms ACU-ODU is 24VDC/10A, so this is the limiting value. On demand, the sat-nms ACU-ODU is available with a power supply that provide higher current.
the following picture shows a DC driver
On the upper side, you see the control inputs, on the lower side the power input and motor output terminals are located. Between three trimmers are located, where the maximum current, high and low speed could be adjusted. When using a 24VDC power supply, the adjustable range is:
| trimmer | range |
|---|---|
| Current Adj. | 0.5A...15A |
| Low Speed | 6.5VRMS...11.7VRMS |
| High Speed | 10.5VRMS...22.4VRMS |
All interfaces are realized with altogether 4 Phoenix combicon connectors, type MSTBT 2,5/ 3-ST. By this an easy replacement of the unit is possible. Use 24VDC as control signal. ATTENTION: As a PWM (puls width modulation) is used to realize the speed control, it is absolutely necessary to use shielded cables for connecting the motors in order to prevent disturbance due to harmonic waves. Take care that the shielding of the cable is connected only on one side of the cable: either on driver or on motor side. This is to prevent ground loops. We recommend to connect the shield to 'PE'-Pin of the DC-driver and isolate shield on motor side. The following table shows the pin description of the motor drivers:
| pin | signal | description | type |
|---|---|---|---|
| SP | speed | speed selection, connect 24VDC for low speed, 0V or floating selects high speed | IN |
| COM | COM control | GND for control voltage | IN |
| ER | error | in 'OK' condition, this pin is connected to COM by an optocoupler. In case of fault state is high Z | OUT |
| R | right | apply 24VDC here to drive motor right | IN |
| COM | COM control | GND for control voltage | IN |
| L | left | apply 24VDC here to drive motor right | IN |
| + | power input | DC power input + (15...35VDC) | IN |
| - | power input | DC power input GND | IN |
| - | power input | DC power input GND | IN |
| M1 | motor- | Motor power output + | OUT |
| PE | protective ground | connect cable shield here | OUT |
| M+ | motor+ | Motor power output - | OUT |