VAMP 221
Arc protection system
Technical description
VAMP Ltd
44
VAMP 24h Technical Support: +358 (0)20 753 3264
VM221.EN013
4.3.
Digital inputs (BI/O bus)
The following BI/O interfaces are included in the standard
VAMP 221 delivery:
La>in
X3-8
Arc input, tripping group 1
Lb>in
X3-9
Arc input, tripping group 2
Ib> in/out
X3-10
Overcurrent input/output
La> out
X3-11
Arc output, tripping group 1
Lb> out
X3-12
Arc output, tripping group 2
GND
X3-13,
X3-14
Grounding for all BI/O signals
The following BI/O interfaces are included in standard VAM
10L and VAM 3L / VAM 3LX deliveries:
I>in
X2-8
Zone shift, 24-48 VDC
GND
X2-7
Current input earth
Trip out
X2-10
Trip output, 24 VDC
GND
X2-9
Trip output earth
The following BI/O connections are included in the standard
VAMP 4C delivery:
L>in
X2-8
Arc input, 24-48 VDC
GND
X2-7
Arc input earth
I>out
X2-10
Current output, 24 VDC
GND
X2-9
Current output earth
4.4.
Auxiliary power supply
Connect the auxiliary supply voltage to the U
s
input, terminals
X3-17 X3-18.
