ea-psu-controller 1.0.0

Controller for Elektro-Automatik power supplies

SOMANET Test Suite - Control for EA PSUs

Optional Step

Move 99-ea-psu.rules to /etc/udev/rules.d/ and restart udev with sudo service udev restart. This rule will create devices, that look like this ea-ps-20xx-xx-0 or ea-ps-23xx-xx-0 with an increasing counter for every connected device.

Before start

To use ttyACMx devices without sudo, add your user to the group dialout:

sudo adduser your_user dialout

Create object

If you added the device rule and you connected only one PSU, there is no need to provide a device name:

psu = PsuEA()

If there is more then one PSU connected to the host, the script will connect to the first device found. To connect to a particular PSU, you can call

psu = PsuEA(comport='ttyACM0')

or take the S/N from the back of the PSU and call:

psu = PsuEA(sn='0123456789')

Dis/connect to power supply for controlling

psu.remote_on()

psu.remote_off()

For multi output devices most functions provide a additional output argument:

psu.remote_on(output_num=0) or psu.remote_on(output_num=1)

It's only necessary to call remote_on(), when you want to control the PSU. If you just want to read device information, you don't need to.

Power on and off output

psu.output_on()

psu.output_off()

or

psu.output_on(output_num=1)

psu.output_off(output_num=1)

Set parameters

Arguments can be int or float.

psu.set_voltage(24)

psu.set_current(0.5)

psu.set_ovp(30)

psu.set_ocp(8)

Get parameters

Return argument: float.

psu.get_voltage()

psu.get_current()

Get status

Return argument: dictionary

psu.get_status()

Dict contains following keys:

• 'remote on'
• 'output on'
• 'controller state' (CV=0, CC=2)
• 'tracking active'
• 'OVP activ'
• 'OCP activ'
• 'OPP activ'
• 'OTP activ'

Get device description

Return argument: tuple (name, SN)

psu.get_device_description()

Close connection

To close the connection, call:

psu.close(remote=False, output=False)

Set both arguments to True to turn off the output and remote control