3.2 Module status
The module status is displayed by two LEDs on the front panel
green LED „OK“ on
all channels have the status “OK“.
green LED „OK“ off
an error occured: safety loop is possibly not closed or the power supplies are out of
tolerance or the threshold of V
max
, I
max
, I
set
or I
trip
(see function descriptions for details)
has been exceeded.
LED will be switched off until the error has been fixed and the corresponding status bit
has been erased via software interface.
yellow LED on
one or more channels have status “HV ON” (voltage on output is greater than 56V).
Green LED blinking
Firmware update is stored into flash, do not switch of power supply, crate etc.
Table 4: Module status information
3.3 Hardware Limit
The maximum output voltage for all channels (hardware voltage limit) is defined by the position of the corresponding
potentiometer V
max
. The maximum output current for all channels (hardware current limit) is defined by the position of the
corresponding potentiometer I
max
. The highest possible set value for voltage and current is given by V
max
– 2% and I
max
– 2%,
respectively. It is possible to measure the hardware voltage and current limits at the sockets below the potentiometer. The socket
voltages are proportional to the relative limits, where 2.5 V corresponds to 102 ± 2 % V
nom
and 102 ± 2% I
nom
. The output voltage is
limited to the specified value. If the current exceeds the hardware current limit (about 30% above the current limit value set by
the limit potentiometer) the channel will be shut off without delay and ramp. In both cases the green LED on the front panel
turns off.
3.4 Safety Loop
A safety loop can be implemented by the safety loop socket (SL) on the front panel and between the SLcontacts (Pin 22 and
PIN 30) at the REDEL-connector, if equipped. If the safety loop is active a high voltage generation in any channel is only possible if
the safety loop is closed and an external current in a range of 5 to 20 mA of any polarity is driven through the loop. For modules
with a REDEL-connector the front panel SL input must be shortened. If the safety loop is opened during the operation the output
voltages will be shut off without ramp and the corresponding bits in the “
ModuleStatus
” and “
ModuleEventStatus
” are cancelled
(see chapter 10 Appendix, “
CAN_EDCP_Programmers-Guide.pdf”
). After closing the loop again the “
ModuleEventStatus
” has to be
reset and the channels have to be switched ON. The loop connectors are potential free, the internal voltage drop is approx. 3 V.
By factory setup the safety loop is not active (the corresponding bits are always set). The loop can be activated by removing the
jumper “SL-disable” on the
, see Figure 1: Jumper configuration on back side.
EDS High Voltage Power Supply series | Last changed on: 17.06.2020 |
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