User Guide
DVS-21
02/2018
• V.1.0 • L. Wolle
41/131
© 2017 ProCom
®
Professional Communication & Service GmbH • Technical changes reserved.
Backplane connectors:
La/Lb AF-Cable
+/-
Power feeding for connecting with 6 cores (3x2)
When connected by four wires (2x2), there is the possibility of phantom
feeding via Lab/Sab. There for, solder bridges must be closed at the
corresponding set of the backplane. The voltage is thus switched to the
midpoints of the transformers.
Sa/Sb Modem cable
7.6 4DAV
Interface module for up to four ProCom stations with two-wire connection technology. The two-wire
connection provides for the power supply (for station with internal 4W-amp), voice transmission and
control information.
The power supply is fused and sustained short circuit proof. If the 25W amplifier within the station is used,
additional feeding has to be provided. This energy supply is fused on the module as well.
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
Incoming connection is active
GREEN - FLASHING (fast) Outgoing 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:
+
a/b Line
-
Supply -
