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40
en | Connection
11.7
Connecting the Alarm Inputs and Alarm Relay Output
The Alarm Inputs and Alarm Output lines should use twisted pair wires with a foil shield where
the drain wire of the foil shield is connected to the chassis/housing ground in the mount
(NDA-7100-PIPE, NDA-7100-PIPEF, NDA-7100-PEN, NDA-7100-PENF) as described below.
–
–
–
To connect the drain wire of the foil shield of the alarm input and alarm outputs shielded
twisted pair cables to the chassis ground of the NDA-7100-PIPE or NDA-7100-PIPEF mount:
To connect the drain wire of the foil shield of the alarm input and alarm outputs, and audio
input and output twisted pair cables to the chassis ground of the NDA-7100-PEN, , NDA-7100-
PENF, or NDA-7100-PIPEF mounts:
These numbers assume maximum relay load. If switching less than this, re-calculate with the
exact switching load for your particular use case to increase the allowed distances.
Table 11.3: Wire gauge and maximum distance, alarm inputs and outputs (2MP model)
Note: Install all Alarm and Audio Equipment in a liquid-tight, metal enclosure that supports
liquid-tight, electrically grounded metal conduit.
11.8
Connecting the Audio Input and Output Wires
Wire Specifications
Wire Type
Distance
Gage
Shield
Twisted pair wires
2023-02 | V01 |
ALARM Input 1 (X106.10) should be twisted with DGND (X106.5)
ALARM Input 2 (X106.9) should be twisted with DGND (X106.5)
RELAY-NC (X106.6), or RELAY-NO (X106.7) should be twisted with RELAY-COM (X106.8)
Wire size
AWG
mm
22
0.643
20
0.811
Shielded twisted pair (recommended)
Typically 10 m (33 ft), but depends on the signal level, noise and quality
of audio required
Typically 22 AWG to connector (X106)
Bare copper braid: 95% coverage
Stranded bare copper. Connect to AUTODOME metal chassis ground
Alarm inputs -
Maximum distance
Meters
152.4
243.8
Installation Manual
AUTODOME 7100i│AUTODOME 7100i IR
Alarm output -
Maximum distance
Feet
Meters
500
N/A at
maximum
current
800
18
Bosch Security Systems
Feet
N/A at
maximum
current
72
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