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DEVICE DESCRIPTIONS
PROANNOUNCE System User Handbook 1.1
5-19
5.1.9 MIC/LINE + Paging Station Module (NRS 90234)
This 2-channel audio input module is meant for the
connection of DPC 4000 Series paging stations and other
external audio sources. The RJ-45 socket of channel A
allows the connection of up to 4 microphone terminals
plus paging station extensions. The MIC / LINE input of
channel B is furnished through an XLRF-type connector
allowing the connection of microphones, mixers and other
audio signal sources. The module can be installed into
slot 1 and slot 2.
Next to the electronically balanced audio input, the DPC
4000 input connector provides a serial RS-485 interface
and the power supply for the connected paging consoles
(see also pin-assignment of the RJ-45 connector). The
paging stations' power supply employs an electronic,
programmable fuse, through which the maximum output
current can be matched to meet actual system
accommodations.
The MIC / LINE input employs an internal switch (PAD)
providing 30 dB of attenuation. The GAIN-control located
on the appliance's rear panel offers additional control in a
range of 40 dB. The input is electronically balanced and
prepared for retrofitting a transformer. Phantom power
can be switched via jumper. If necessary, a compressor /
limiter circuit can be incorporated in the audio path.
Input channels can be switched separately to the monitor
bus and you can listen to the signal via headphones or
loudspeaker, either which being connected to the monitor
output. Automatic pilot tone surveillance of the entire
input stage is integrated as well.
figure 5.22 MIC/LINE + paging station module (NRS 90234)
Note:
When connecting
several paging consoles to a single input, please keep in mind that line
interruption or short-circuit can cause malfunction of several or even all paging stations of that
specific line. In emergency alert installation, connecting security-related consoles to individual
inputs is therefore of major importance.
Specifications:
description
DPM-MLC MIC/LINE + paging station module, NRS 90234
connections
1 x RJ-45 socket; 1 x XLRF-type connector
input A
DPC 4000, electronically balanced, transformers are optionally available
nominal input level
0 dBu / 775 mV
max. input level
+12 dBu / 3 V
input impedance
20 kW
input B MIC/LINE, electronically balanced, transformers are optionally available
nominal input level
MIC: -54 dBu ... -14 dBu / 1.5 mV ... 155 mV
LINE: -24 dBu ... +16 dBu / 50 mV ... 5 V
m
ax. input level
MIC: +5 dBu / 1.4 V
(in limiter operation)
LINE: +30 dBu / 25 V
input impedance
MIC: 3.6 k
W
LINE: 10 k
W
Phantom power
24V / 20 mA, switched via jumper
audio
input balancing > -30 dB
frequency response
20 Hz ... 20 kHz, ± 0.5 dB
S/N ratio
> 95 dB (A-weighted)
distortion
< 0.01 %
A/D-conversion
18-bit linear, Sigma-Delta
control interface
1 x RS-485 standard