4.2. Commands

The ALx Series MagnaLOAD DC electronic load features a variety of commands, which can all be accessed from the front panel, external user I/O, and computer interface.

4.2.1. Start

The Start command engages the MagnaLOAD electronic load’s DC input to allow the product to begin dissipating power, transitioning the status from Disabled to Enabled. The Start command switches the dissipative elements into of the DC circuit using a high-speed switching device.

4.2.2. Stop

The Stop command disengages the MagnaLOAD electronic load’s DC input to stop the product from dissipating power, transitioning the status from Enabled to Disabled. The Stop command switches the dissipative elements out of the DC bus using a high speed switching device.

Warning

Even when the Stop command is issued and the MagnaLOAD electronic load’s status is Disabled, there could still be hazardous voltages on the DC input from an externally connected DC source. Ensure that all instrument connections, load wiring, and load connections are either insulated or covered so that no accidental contact with lethal output voltages can occur. Always use a voltmeter to test the DC bus before making any connections.

4.2.3. Clear

The Clear command unlatches all soft-faults conditions and returns the MagnaLOAD electronic load to standby, allowing the user to resume normal operation of the product. All soft-fault conditions must be resolved before clearing the latch. Once the fault has been cleared, the input can be re-enabled with the Start command.

4.2.4. Lock

The Lock command secures settings by locking the MagnaLOAD electronic load, preventing changes to set-points and configuration settings through the front panel. When the MagnaLOAD electronic load is locked, the front panel Lock button is back-lit red. In addition, the Lock status can be configured as one of the external user I/O digital outputs or queried by computer interface.