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P/N 315-050490-3
Virtual Network Tunnel
Installation Instructions
Model VNT
INTRODUCTION
The Model VNT Virtual Network Tunnel (as shown in Figure 1) from Siemens Industry,
Inc. is a UL approved fanless single board computer that is powered from its local
24V power supply with battery back up. The VNT Gateway is responsible for support-
ing the intercommunication of system components.
It transports HNET and XNET supervision and
monitoring between VNTs via TCP/IP. It also routes
audio over TCP/IP when required between VNTs. If
the VNT Gateway is at a control point, it is respon-
sible for generating audio from the local source.
The VNT Gateway utilizes some or all of the
following interfaces depending upon its location
within the system:
•
100BaseT TCP/IP connection to a local Fiber Ring Switch. This connection
transports the network signals (HNET and XNET), audio, supervision and
monitoring data streams.
•
One or more independent HNET RS485 interfaces to the module network of an
XLS/Desigo Fire Safety Modular/Cerberus PRO Modular or its components.
•
An XNET RS485 interface to the XLS/Desigo Fire Safety Modular/Cerberus
PRO Modular node(s) within a given system.
•
An XNET over TCP/IP feed to an NCC at a command center.
•
An HNET RS485 interface to an XLS/Desigo Fire Safety Modular/Cerberus
PRO Modular node within a given system.
•
An audio input to accept a microphone paging source.
•
An audio output to distribute paging audio to a given system.
INSTALLATION
The VNT mounts on a VNT-MP in a CAB1, CAB2 or CAB3 enclosure. Refer to the VNT-MP
Installation Instructions, P/N 315-050489, for information on mounting the VNT-MP.
Remove all system power before installation, first battery then AC. (To power up,
connect the AC first, then the battery.)
The following items are supplied with the VNT (P/N 500-650490):
Quantity
Item
1
VNT fanless computer
1
Cable P/N 555-150464
1
Cable P/N 555-150494 (to fiber switch)
4
#8-32 hex nuts
Figure 1
Virtual Network Tunnel
