© EPS Stromversorgung in 2022, this information is subject to change without notice
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30000800_manual_psb_10000_4u_30kw_en_04
d) Switching between source and sink mode
You can also switch between both modes when remotely controlling the device with the AI. This is done using the voltage set
value (VSEL), which then must not be tied to a fixed potential, like shown in example b). Rules:
•
If the voltage set value on VSEL (in %, not the level) becomes higher than the actual voltage on the DC terminal, the device
will switch to sink mode, no matter if the voltage on the DC terminal is generated by the device or from external
•
If the voltage set value becomes lower than the actual voltage, the device will switch to source mode.
e) Determining the actual operation mode between source and sink
The limited number of pins on the AI doesn’t allow for a separate signal to indicate sink or source mode. There are basically
two ways to determine the actual mode in analog remote control:
•
Compare the actual voltage output (VMON) with VSEL and also read the CMON signal -> if the level of VMON is higher than
VSEL and CMON isn’t zero, then the device is in sink mode, otherwise if VMON is equal to or lower than VSEL, it’s in source
mode, no matter what the level of CMON is
•
Configure pins 9 (VMON) and 10 (CMON), as described in
Mode A
or
Mode B
and read both pins; when DC current
is flowing in any of both directions, one of the pins will indicate with a level > 0 V.
