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User Guide
DVS-21
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
GREEN - FLASHING (fast) Incoming connection is active
GREEN - FLASHING (slow) Faulty connection
GREEN - OFF
GREEN - ON
GREEN - OFF
Line fuses
Backplane connectors:
La/Lb AF-Cable
Switching voltage for the playback amplifier
C
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
02/2018 • V.1.0 • L. Wolle
© 2017 ProCom
Outgoing connection is active
Idle state
Ready power supply (48V)
Fuse burn-out (48V)
Microfuse of the supply voltage for connected devices
®
Professional Communication & Service GmbH • Technical changes reserved.
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