P/N PM000223A • Rev. 1 • ISS 9 August 2017
21
Installation Manual
NU-Series Hardware
System Power
3
System Power
The Ascom Telligence system power begins at the facility's Mains power circuit. Next is an
Uninterruptible Power Supply (UPS). The UPS provides emergency power to a load when
the input power source or Mains power fails. The UPS must be placed between the Mains
power circuit and all the sources of Telligence powering equipment. These sources include
one or more of the following devices.
• PoE switch providing power for Telligence IP devices.
• Gateway II (NGGTWY2) providing 36VDC power to NUDL-series dome lights and
Passive Bus Concentrator (NUPBC) hallway devices. An NUDL-series dome light powers
active room modules connected to its two room buses. The NUPBC hallway device
powers passive room devices connected to any one of the eight NUPBC ports.
• An optional 24VDC power supply is needed when connecting legacy passive
teleCARE M room modules to the NUPBC.
Notes:
• Installations requiring compliance to ANSI/UL 1069 shall only use PoE switches that are
E23929 listed.
• The optional 24VDC power supply and teleCARE M devices shall not be used in
installations requiring compliance to ANSI/UL 1069.
• Installations requiring compliance to VDE 0834 shall be connected to the facility Mains
power circuit in accordance with the instructions and requirements that follow.
3.1
Mains Power Setup
The Ascom Telligence system powering equipment shall be setup in accordance with the
layout shown in Figure 19. on page 23. Ascom recommends installing all Telligence
powering equipment in a common rack or cabinet.
For VDE Compliance
The Ascom Telligence equipment rack or cabinet must be physically hard-wired to the
facility’s Mains circuit. Using a power cord to connect to the Mains circuit is prohibited. An
all-pole switching device shall be provided for system shutdown.
Figure 18. VDE 0834-1 compliance required Mains power connection
