HMC Electronics MDL Series BK Precision DC Electronic Load System Module User Manual
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Overpower Protection (OPP)
The electronic load includes both hardware and software OPP features.
Hardware OPP – In the event that the electronic load’s input power exceeds the set power
protection limit, the hardware OPP will limit the power. Once the hardware OPP is triggered, the
status register’s OP bit will be set. When the hardware OPP is removed, the status register’s OP bit
will be reset. Hardware overpower protection will not turn the electronic load’s input off.
Software OPP - Users can set the electronic load’s software OPP value with the following steps.
Panel Operations
VFD Display
1.
Power on the electronic load.
Self-test
2.
Press Shift + ⑧ to enter Configuration menu.
Sync On Set
Von
Meter
Protect
List
Ext. Ctrl Set
About
Exit
3.
Press key to select <Protect> and press Enter to go into
protection menu.
Max Power Set
Alimit State
Alimit Point
Alimit Delay
Plimit Point
Plimit Delay
OnTimer State
OnTimer Set
Exit
4.
Press key to select <Plimit Point> and press Enter. Input OPP
power value and press Enter to confirm.
Power Limit
Set= 210.00W
5.
Press key to select <Plimit Delay> and press Enter. Input delay
time before alarm and press Enter to confirm.
Power Limit
Delay= 3S
6.
Press Esc key to exit menus.
If the electronic load’s power value is above the set overpower protection value, the electronic
load will automatically turn off and the VFD will display OPP. At the same time, the OP and PS bits
in the status register will be set and remain until they are reset.
Documentation Provided By HMC Electronics
33 Springdale Ave. Canton, MA 02021
(800) 482-4440