Active Bus Connections - ASCOM NU Series Installation Manual

Installation Manual
NU-Series Hardware
A typical active room bus setup is shown below.
Legend:
(1) Gateway II
(2) Power from Gateway II to hallway devices (+36V and GND)
(3) Hallway bus from Gateway II to hallway devices,
Devices" on page 16.
(4) Dome light (NUDL4S or NUDL2S)
(5) Two active room bus connectors

2.6.1 Active Bus Connections

The active room bus consists of four unshielded twisted wire pairs that carry +5.5V,
microphone, speaker, and ground. The bus uses a serial protocol with a a baud rate of
19k2. The room bus is daisy chained from module to module. All modules are equipped
with two RJ-45 connectors for easy daisy chaining.
Important: The room bus cable shall not exceed a maximum length of 30m(100ft).
P/N PM000223A • Rev. 1 • ISS 9 August 2017
System Cabling
Figure 16 Dome light with active room bus
See "Daisy Chaining Hallway
18