EL – Owner’s Manual – Rev.00 – September 2022 34
In case the fuses blow, open the slots on the front panel to replace them. The fuses to be used are the
following: Two fuses each with 250 V, 12.5 A (T), Ø5 x 20mm.
4.7.2 DC VERSION
The DC version has a 2 pins connector compatible with cross section cables of 16mm². The upper one
is the positive voltage input (usually red cable). The lower one is the negative voltage input (usually
black cable).
Attention!
Do not exceed a maximum input voltage of 60V, even in case of single fault. The device
can be used with a floating input as well. In this case, the absolute voltage difference
between chassis/earth and either of the power supply voltages must not exceed 100 V.
The device must not be directly connected to a primary distribution network. A primary
insulation must be placed in the installation upstream the device.
The DC version has a magnetothermic switch, which protects the device from overcurrent. Switch it to
the upper position to power supply the device.
The chassis must to be earthed separately to prevent contact with dangerous voltage and to allow the
correct functioning of the device. The earthing system must comply with all relevant local safety
guidelines, rules, directives and regulations. Remove the screw and the washer from the labelled spot
on the back side of the electrolyser and use them to connect the earth cable.
Earthing symbol on device
4.8 DRY CONTACT CONNECTION GUIDE (OPTIONAL) (DRY CON.)
The device has integrated dry contact sockets to allow emergency stops triggered by external devices
e.g. a hydrogen sniffer or emergency stop relay button. If no dry con chain needs to be integrated,
please jump to the section below.
The cables of the input and the output should be twisted. The ferrite provided with the machine should
be placed as close as possible to the output connection (upper slot) with a double turn, as shown in the
picture.
Connect the male connector of the dry contact chain to the female port on the device, labelled “DRY
CON”. The dry contact chain is closed during normal operation and opens in case of emergency. That
means that an external safety device should show a “closed loop” during healthy state and an ”open
loop” in case of a warning or error.
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