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VP-1405A Advanced Power
V-PM1000 Series, Veesta Power Module Product Series
48V Power Supply & Charger Instructions & User's Manual
4.5
Precautions in Installation
4.6
RS485 Communication Wiring
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Bellow list are the precautions that you should follow during the
installation of VR-1405A to achieve best performance. In some case
if you do not follow these instructions your device may be damage,
so it is important you follow these terms and conditions during the
installation:
o Please select the wire with the cross-sectional area greater
than 2.5 mm2 for the output cable,
o Install miniature circuit breaker in 4A/250VAC fuse for the input
mains.
o The terminal capacity is 15A, the output and battery terminals
use two terminals wiring, so you should use from double wiring
for load and battery connections; otherwise it is easy to burn
the terminal and wire!
o The alarm terminal is forbidden to overload and short circuit,
otherwise the electronic alarm contact will be burned.
o The product is not allowed to work in parallel without extra
Parallel and Redundancy expansion module.
o The PE is connected to the shell inside, as well as FG screw.
The PE and FG should be reliably connected to the earth to
increase the anti-interference ability.
o The installation method is to face the identification and the
terminal is installed in the vertical direction to ensure that the
heat sink is perpendicular to the ground to facilitate heat
dissipation.
o When the power supply is working, the outer casing is hot, up
to 85°C. Please keep a certain gap (minimum 10 cm) around
the power supply to keep the air flow to facilitate heat
dissipation.
o Keep temperature-sensitive devices or heating components as
far away as possible from the power supply.
A serial port provides communication capabilities between the power
module of VP-1405A and remote computer, PLC or distributed
control system (DCS) or any remote terminal unit (RTU) by the
RS485 communication standard and it can be daisy chained together
with 24 AWG stranded, shielded, twisted pair wire on a single
communication channel.
Suitable wire should have a characteristic impedance of 120 ohms
such as Belden #9841. These wires should be routed away from high
power AC lines and other sources of electrical noise. The total length
of communications wiring should not exceed 1200 meters for reliable
operation.
Chapter 4 - Unit Installation
Page 21 of 46
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