User`s manual

Table Of Contents
User’s Manual
10 System Installation
DAISY-CHAINING DIGIMUX UNITS AND KEYBOARDS
Up to ten DigiMux units can be daisy-chained via the RS-485 bus, which enables the
ControlCenter keyboard(s) to control the domes connected to multiple DigiMux units.
The RS-485 bus can be accessed via the External I/O Connector board or the RS-485
port. The American Dynamics MegaPower LT can also be connected with DigiMux
units through the RS-485 communications port. See the MegaPower LT Installation and
Operation Handbook for more details.
To select a camera using the keyboard, you select the appropriate DigiMux on the
keyboard (i.e.,
DigiMux unit “8”) and then the channel (i.e., Camera_4).
NOTE: A maximum of 32 devices may share the 485 bus, which includes: DigiMux,
ControlCenter keyboards, and compatible domes. A maximum of 10 DigiMux
units can be daisy-chained together.
There are three ways to daisy-chain the units:
1. Using the RS-485 (RJ-11) ports on the DigiMux: one for a keyboard, and one for an
additional DigiMux unit. The connected unit and keyboard can also be daisy-
chained.
2. Using the External I/O Connector board: the DigiMux units can be connected
from D+ to D+ and D- to D- on the External I/O Connector boards on the unit
rear panels.
Audio Line In is an audio jack for connection to an audio source device,
such as an amplified microphone. The Line Out audio jack
connects to an audio output device, i.e., amplified speakers. RCA
connectors are used for both audio Input and Output.
External I/O
Connector
Board
Terminal block I/O connector for alarm in, alarm out, alarm
switches, Day/Night switch, etc.
Call Monitor
(BNC)
BNC connector for connection to an optional Call Monitor.
Camera
Input
(1 - 16)
BNC connectors for Video Input streams from cameras. The
number of BNC connectors is equal to the number of channels. A
16 channel DigiMux has 16 connectors, a 9 channel has 9
connectors, and a 4 channel has 4 connectors.
Ground Connector for a grounding wire if additional grounding for the
unit is necessary.