2. Installation.
2.1 Requirements.
The buffer PSU shall be mounted by a qualified installer with appropriate permissions and qualifications
for 230 V AC installations and low-voltage installations (required and necessary for a given country). The unit should be
mounted in confined spaces with normal relative humidity (RH=90% maximum, without condensing) and temperature
from -
10°C to +40°C. The PSU shall work in a vertical position that guarantees sufficient convectional air-flow through
ventilating holes of the enclosure.
As power supply is designed for a continuous operation and is not equipped with a power-switch, therefore, an
appropriate overload protection in power supply circuit should be provided. Moreover, the user shall be informed about
the method of unplugging (most frequently through separating and assigning an appropriate fuse in the fuse-box).
The electrical system shall follow valid standards and regulations.
2.2 Installation procedure.
CAUTION
!
Before installation, cut off voltage in 230V power-supply circuit. To switch power off, use an
external switch, in which distance between contacts of all poles in disconnection state is not
less than 3mm.
It is required to install an installation switch with a nominal current of 6 A in power supply circuits
outside power supply unit.
1. Mount module of power supply in a selected location and connect wires.
2. Connect power cables (~230 V) to L-N clips of PSU
3. Connect ground wire to clip marked by earth symbol
. Use a three-core cable (with a yellow and green
protection wire) to make connection
). Lead the cables to the appropriate clips through the insulating bushing
of the PSU.
Shock protection circuit shall be done with a particular care: yellow and green wire coat
of power cable should be connected to terminal marked with the grounding symbol on PSU
enclosure. Operation of PSU without the properly made and fully operational shock protection
circuit is UNACCEPTABLE! It can cause damage to equipment or an electric shock.
1. Connect equipment to appropriate output terminals of power supply (positive pole marked AUX+, negative pole
marked AUX-).
2. Connect the batteries with the PSU paying special attention to the correct polarity and type of connections
(Fig. 4):
a)
b)
.
Fig. 4 Connecting batteries depending on version of power supply:
a) PWB-52V1A, b) PWB-52V2A,
CAUTION: PWB-52V1A power supply operates with one 12V battery, while PWB-52V2A requires two 12V
batteries connected in series!
3. Switch on 230 V supply. LEDs on the PCB of power supply should light
4. After installing and checking proper working, enclosure/cabinet etc. can be closed