The PS12DC is a power switching board designed for medium to low current DC power switching applications. Controlled through 12 digital outputs, the board can switch power sources ranging from 5 to 28V DC. Attach the PS12DC to the DB15 connector presented on all compatible devices, and toggle the states of the EIO and CIO digital output lines to turn the switches on/off. This device requires at least one compatible power supply, and a multi-channel digital output source, such as a LabJack, or Arduino.
- 12 digitally controlled switches with LED indicators
- Optical isolation
- Handles 5 - 28 Volt supply
- Up to 750mA/chan
- Resettable fuse protection
- Flyback protection
- Solenoid Valves/Actuators
- Simple DC Motors
- Low Voltage DC Lighting
- LED Drivers
You will need a LabJack, a PS12DC, and something to control. The diagram below demonstrates how to make connections for controlling a DC Motor, and a Fan.
- Option A - Items are powered by 5V power supply (VS) located on the LabJack, this is the most basic connection.
- Option B - Items are powered by 12V external power supply.
- More Options - See Appendix A - Wiring Diagrams
Once the wires are attached, turn the DC Motor on and off by toggling the state of the appropriate digital control line. When the control IO is output-low, S0 will sit at 0V. When the control IO is output-high, S0 will be at the voltage connected to VS1. Look at the IO Reference table below to identify which control line to toggle. The DC motor is connected to S0, so that means a state change in EIO0 will turn it on and off.
If the PS12DC is attached to the LabJack differently than in the picture above, there will be a different corresponding digital IO line. The full pinout details can be seen in Appendix C - Pinout Info .
Download LJControlPanel to get started, or create a program in one of our supported languages to communicate with the LabJack. It will also be necessary to install the UD driver, so the LabJack is recognized over USB.
Other Compatible Devices
If there are problems with the PS12DC, insure the following:
- There is a working power supply (5 to 28V) connected to one of the power supply blocks, e.g. VS1/GND1. Connect wires to VS as shown below if no power supply is available.
- The switch number under inspection is being powered. For instance, if checking S8, verify that VS5/GND5 are connected to a working power supply.
- Verify that the LEDs turn on and off when the digital output states on the LabJack are toggled high and low. This can be accomplished by opening LJControlPanel, and checking/un-checking the boxes next to the digital output of interest. Or download the test program: LJTestPS12DC.zip
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The U12 has been an absolutely essential piece of hardware in my experimental projects. It's performed exceptionally well and I've recommended the device to several of my colleagues.—Brendon, Electrical Engineer