VAMP 221
Arc protection system
Technical description
VAMP Ltd
74
VAMP 24h Technical Support: +358 (0)20 753 3264
VM221.EN013
Wiring between the central unit and the I/O unit
Connect the central unit to the I/O units with a modular cable
of type VX001. The modular cable carries all information
between the central unit and I/O units, including data in serial
form, arc fault messages and operating supply to the I/O units.
•
Connect the VX001 cable to the X6 cable outlet (COM2) or
the interface X3-1...6 of the central unit (COM1). Both
COM ports can be used simultaneously.
CAUTION!
If you use the terminal X3-1...6, pay particular attention to the
wiring of the signals. Faulty wiring may damage the
communication between the central unit and the I/O units.
•
Connect the cable to COM1or COM2 on the first I/O unit.
•
Route the cable from COM1 or COM2 on the first I/O unit
to COM1 or COM2 in the next unit, etc.
All the COM1 and COM2 interfaces are identical, i.e. the cable
can always be connected to either interface. The maximum
total length of the modular cable, taking into account all the
I/O units connected to the central unit, is 100 m.
Wiring separate auxiliary supplies
When routing modular cables over long distances or when the
system contains more than five I/O units, you should preferably
use a separate auxiliary supply parallel with the modular
cable.
Connect the auxiliary supply to the 24 V terminals X3-1 and
X3-2 in the central unit to the 24 V terminals X2-1 and X2-2 in
the I/O units. Alternatively, you can also use a separate
external direct voltage supply.
NOTE!
Pay particular attention to the polarity of the cable
connections.
7.2.3.
Arc sensors
Mount the sensors on the switchgear in such a way that they
cover the protection zone as completely as possible. The line of
sight must be free between the sensor and the supervised area.
If point sensors are used in open compartments (such as bus-
bar sections), there should be a sensor approximately every 5
meters. Due to the wide detection range of the sensors and the
light reflection inside the switchgear, the mounting position is
not critical.