Connection; Audio Input; Line Level Signal - Bosch PAVIRO PVA-4CR12 User Manual

16 en | Connection
6

Connection

6.1

Audio input

6.1.1

Line level signal

MIC/LINE IN
This Euroblock inputs allow the connection of low impedance microphones or line level audio
sources.
The audio inputs are electronically balanced. You must always use a balanced audio signal at
the input of the device where this is possible. The scope of delivery for the device includes a
3-pin connector. Conductor cross-sections of 0.14 mm² (AWG26) to 1.5 mm² (AWG16) can be
used.
Recommended connecting cable: balanced cable with shielded twisted-pair 0.14 mm².
Balanced cabling
The following illustration shows the balanced cabling of an audio input (or output) on the
device.
Figure 6.1: Balanced cabling
Unbalanced cabling
If the connecting cable(s) is/are very short and no interference signals are to be expected in
the environment of the device, then an unbalanced signal can also be connected. In this case,
it is imperative that a bridge in the connector between the shield and the inverting pin is
switched (see diagram below), otherwise the level can drop by 6 dB. However, for reasons of
immunity to external interference sources such as dimmers, mains supplies, HF control lines
etc., balanced cabling is always preferable.
Figure 6.2: Unbalanced cabling
2022-11 | 07 | F01U306900
User manual
PAVIRO Controller
Bosch Security Systems