Procom 4NPA User Manual
Data Sheet
1
4NPA
LF Interface Module
4NPA
Low Frequency Interface Module for Intercom and Public
Address Systems
Fig. 4NPA (L- No. 2.320)
At a Glance:
Date:
13.03.2009
• Low frequency (LF) control of third-party amplifiers in intercom
systems
• Connecting call stations with line control in public address
systems
• Low frequency call forwarding of/to radio module
• Low frequency interface for external low frequency sources
• Gate intercom (optional)
Page:
1/5
© 2008 ProCom, All rights and technical changes reserved
Author: HS Document-No.:
DB_4NPA_2320_01
Data Sheet
A
A
V
1
4NPA
LF Interface Module
The DVS-21 is capable of connecting not just our own but also third-party devices. A low frequency connection and control through C and V points makes
possible the use of the module 4NPA for four devices.
In order to meet other control requirements the 24LI line module can also be
used.
Application Description:
WPS-04
WPS-08
DTA-012 030/ 048/ 066/ 084/ 114
Radio
PABX
Radio
Modules
Third-party
Call Station
PA /
Control / ACK
Intercom
Radio
LF a / b
AWC-06
LF a / b
Carrier
Monitoring / Tone
ringing
SV01
4NP
24LI
2TW *
2TW *
CPU1 4NS
DVS-21
100
LC
LS 1
LS 2
LS n
Application examples for intercom and public address systems with 4NPA
The 4NPA can be used for various applications.
With PA applications, for public address through a line-controlled call station, in
addition to the 4NPA module also the line card 24LI and the amplifier V100 are
required. The same applies for use with a signalling system (PABX) or radio
modules.
For intercom functionality at least one further call station is necessary. This can
be another third-party call station on the same or a second 4NPA module or a
ProCom call station on a 4NSA module.
In standard use, a gate intercom is realized with ProCom call stations and the
4NSA module.
As alternative the gate intercom function can be realized with the 4NPA module and a third-party call station as gate call station. For this a ProCom call station connected over the 4NSA module and a line card 24LI are required. Here it
must be taken into account that the third-party gate call station must have control
points (-V and C points) to switch the microphone and the call station amplifier.
Further areas of application are LF control of external amplifiers as well as the LF
connection of external sources (e.g. CD player).
* TW: Twin Wire
Date:
13.03.2009
Page:
2/5
Author: HS Document-No.:
© 2008 ProCom, All rights and technical changes reserved
DB_4NPA_2320_01
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