HeiTel
Digital
Video
GmbH
-
Quick
Installation
Guide
Cam4mobile VG
22
Cam4mobile VG
English
Standard swit
c
hing for
c
ontrol inputs
The
Cam4mobile VG
has
a
large
number
of
control
inputs
(
Al in
,
Al a/d
,
Control in1
to
Control in4
/
Control in10
,
Aux in
).
However
these
inputs
are
not
galvanically
isolated
from
the
operating
voltage
of
the
device.
Depending
on
the
configuration,
these
can
be
activated
by
"Normally
closed"
or
"Normally
opened"
contacts.
Wiring variants for voltage-monitored
c
ontrol inputs
In
addition
to
standard
wiring
of
control
inputs,
the
Cam4mobile VG
permits
different
types
of
voltage
monitoring.
Normally terminated (10k)
The
wiring
variant
Normally
terminated (10k)
allows
different
circuitry
for
"Normally
opened"
and
"Normally
closed".
For
circuitry
with
a
resistance,
a
distinction
is
made
between
two
different
states:
■
Not triggered
:
The
figures
show
the
safe
state
in
each
case
(not
triggered)
of
the
detector
line
or
the
control
input
for
the
variants
"Normally
opended"
and
"Normally
closed".
■
Camera alarm
:
If
the
"Normally
opened"
or
"Normally
closed"
contact
is
operated,
depending
on
the
type
of
circuit,
a
camera
alarm
is
activated.
Manipulations
of
the
detector
line
such
as
interruption
or
short
circuit
cause
triggering
as
soon
as
the
Cam4mobile VG
no
longer
measures
the
predefined
control
resistance
of
10 kOhm
(±40%).
The
control
inputs
must
always
be
activated
such
that
they
are
potential-
free
!
Input
c
ir
c
uits of
c
ontrol inputs
0V
U
b
(5V)
Circuit
external
internal
Activation with
“Normally closed”
1.5
k
Ω
0V
U
b
(5V)
Circuit
external
internal
Activation with
“Normally opened”
1.5
k
Ω
Normally opened
Control input
Cam4mobile VG
R=10 k
Ω
R=10 k
Ω
Control input
Cam4mobile VG
Normally closed
