4Lsl - Procom DVS-21 User Manual

User Guide
DVS-21
Backplane connectors:
M a/b - Output for 4LSL measuring frequency
Important! Close both bridges on Set 4 of the backplane!

7.17 4LSL

Measurement module for loudspeaker line (LL) monitoring (impedance, short circuit, line break),
loudspeaker line toggling and voice acknowledgment when public address is made
up to Module Firmware 2106
AD Converter (U) Voltage threshold at AD Converter of the voltage path
AD Converter (I)
Voltage threshold at AD Converter of the current path
Tolerance permissible deviation from the measured reference values
as from Module Firmware 2110
Disable in case of short circuit
AD Converter (U)
AD Converter (I)
Tolerance
Check measuring (twofold)
as from Module Firmware 4102
DVS Firmware as from 7.60
ICS Version as from 7.00 Rev. 036
Disable in case of short circuit
AD Converter (U)
AD Converter (I)
Short circuit, emergency switch-off!
Enable after shortcut removal
02/2018 • V.1.0 • L. Wolle
© 2017 ProCom
Loudspeaker relay is disabled if the impedance measurement detects a
short circuit
Voltage threshold at AD Converter of the voltage path
Voltage threshold at AD Converter of the current path
permissible deviation from the measured reference values
Verification by a 2nd measurement before a warning is issued
Loudspeaker relay is disabled if the impedance measurement detects
a short circuit
Voltage threshold at AD Converter of the voltage path
Voltage threshold at AD Converter of the current path
Emergency switch-off if a short circuit is detected during a public
address
Public address is only possible if an impedance measurement is
made without a short circuit
®
Professional Communication & Service GmbH • Technical changes reserved.
64/131