Dynacord DPA 8150, User Manual

Page: 14 / 46

For each channel of the output stage there is a direct line input with additional plug contacts
switched in parallel which can be used to loop through the audio signal. With the help of
integrated pilot tone monitoring, a missing or faulty input signal can be detected reliably. The
audio inputs are electronically balanced. You must always use a balanced audio signal at the
input of the output stage 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 flexible 2 x 0.14 mm²
shielding.
AEC input
The audio signal at the AEC input (audio emergency channel) can be switched internally to
each amplifier channel. The volume level of the AEC signal can be adjusted separately. The
plug contact switched in parallel can be used to loop through the audio signal. With the help
of integrated pilot tone monitoring, a missing or faulty input signal can be detected reliably.
The audio input is electronically balanced. You must always use a balanced audio signal at the
input of the output stage 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 flexible 2 x 0.14 mm²
shielding.
Notice!
The separate level setting for the direct input or the AEC input is made during configuration in
IRIS-Net.
Balanced cabling
The following diagram shows the balanced cabling of an audio input on the DPA output stage.
Figure 6.1: Audio input 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 output stage, then an unbalanced signal can also be connected. In this
case, it is imperative that a bridge in the input connector between the screen and the inverting
input 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.
14 en | Safety information PROMATRIX 8000 POWER AMPLIFIER
19-Aug-13 | 03 | F01U217494 User manual