Sonix Vw2 Technical Manual
10
SONIX VW2 TECHNICAL MANUAL
TM368 / A May 2022 www.eaton.com
4.7 Beacon output connection
There are two independent Beacon output ports
available on each Sonix Vw2 unit; both divided into
Output and Return terminals.
The Output terminals are the primary terminals and the
Return are optionally used to connect the return side of
a loop.
Maximum cable section supported by the output ports
are:
Solid:
16.0 mm
2
Stranded:
16.0 mm
2
including sleeved or non-
sleeved ferrule
Warning:
Possible hazardous voltages present.
Great care should be taken during installation and
maintenance of this unit. Cover should not be
removed during live operation. The cover needs
to be replaced after installation or maintenance
of the unit.
4.7.1 Maximum load and fusing
The maximum load that can be connected to a single
Vw2 output port is based on 2 parameters; surge
current and steady state current.
The maximum allowable steady state current is limited
to
10 A
by the internal fuse but can be reduced if a
lower value RCBO is installed in the beacon supply.
The maximum allowable peak surge current is limited to
100 A
by the on-board relays.
The unit is fi tted with a pair of
10 A
10 x 38 mm Mersen
fuses, part number S218194.
Warning:
Only replace fuses with original
manufacturer or equivalent.
Warning:
Beacons without soft-start circuits can
have peak surge currents of 100x steady state
current.
4.7.2 Connecting beacons as a loop
The Sonix Vw2 unit has been designed to allow for idle
loop health monitoring by energizing the loop for a short
period of time, not enough to activate the attached
beacons, but enough to detect a healthy loop.
The Earth terminals that are part of the Vw2 output
are provided for functional earthing only, Protective
earth connections should be terminated directly to the
protective earth.
Figure 7 - Typical beacon loop wiring
4.7.3 Connections as a spur
The fi eld beacon units can be connected as spur, rather
than a loop.
Figure 8 - Spur wiring
ote:
N
Loop monitoring is not available if beacons are wired as a spur.
Vw2 Unit
Sonix PA/GA
L / +
N / -
E
RETURN
L / +
N / -
E
OUT
Vw2 Unit
Sonix PA/GA
L / +
N / -
E
RETURN
L / +
N / -
E
OUT
J1
J2
F2
F1
J6
J5
J3
D20
J4
Beacon Supply
Primary
L / +
N / -
E
J2
Relay
Other Vw2 units
T
T
Beacon Supply
Primary
Beacon Supply
Secondary
Beacon Supply
Primary
Beacon Supply
L / +
N / -
E
J2
T
T
L / +
N / -
E
L / +
N / -
E
J1 / J6
