Procom DVS-21 - 7.7 4 NPA

User Guide
DVS-21
02/2018 • V.1.0 • L. Wolle
42/131
© 2017 ProCom
®
Professional Communication & Service GmbH • Technical changes reserved.
7.7 4NPA
Audio Frequency (AF) interface module, parallel, analog, for connecting four stations with V- and C- point,
including fuse.
The module contains only AF-interface with power feeding. Controlling lines (keys) is done via the line
module 24LI.
Level incoming
AF input gain (from the external device to the module)
Level outgoing
AF output attenuation (from module to external device)
Display and control elements:
LEDs
GREEN - ON
Outgoing connection is active
GREEN - FLASHING (fast)
Incoming connection is active
GREEN - FLASHING (slow)
Faulty connection
GREEN - OFF
Idle state
GREEN - ON
Ready power supply (48V)
GREEN - OFF
Fuse burn-out (48V)
Line fuses
Microfuse of the supply voltage for connected devices
Backplane connectors:
La/Lb
AF-Cable
C
Switching voltage for the playback amplifier
Normally it is connected to the mid Lab. (Close the first solder bridge at the
corresponding set of backplane)
-V
Switching voltage for the microphone amplifier
+/-
Supply