AD2081 Port Expander
Installation & Operating Instructions
8000-1785-01, Rev. B1
AMERICAN DYNAMICS PRODUCTS 1
AD2081 Port Expander
The AD2081 Port Expander is used to increase the
number of RS232 ports available on the AD1024,
AD2150, AD168, and MegaPower 48 Matrix
Switcher/Controller systems. The AD2081 connects to a
single system RS232 port and provides four RS232 ports
for connection to external devices such as AD
keyboards, alarm interface units, and video loss detector
modules.
Equipment Provided
Description
Part Number
Qty
cable assembly w/ junction box
0650-0991-01
1
rubber feet (optional desktop
mounting
)
1401-0026-02
4
velcro strips (3 inches)
0500-5689-01
4
transformer (for 120 VAC applications)
0650-1772-01
1
transformer (for 230 VAC applications)
5604-0180-01
1
power connector
N/A
1
port expander module
2025-0305-01
1
installation manual
8000-1785-01
1
Mounting
The AD2081 is provided with a velcro strip for versatile
wall mounting. Four rubber feet are also provided for
optional desktop mounting.
Connections
All communications and power connections are made
on the unit’s front panel to facilitate cable management.
Communications connections are made using modular
cables with RJ-45 connectors. A single RJ-45 jack is
provided for connection to the system CPU. Four RJ-45
jacks labeled A through D are provided for connection
to external devices. The Power connection is made to
the two pin connector labeled “8-12V” on the Port
Expander front panel. A single cable and terminal block
is provided with the AD2081. Additional cables and
break-out boxes are provided with the other system
devices used in the hook up.
Data and Power Indicators
A green LED labeled “DATA” is provided on both the
front and rear panels of the AD2081. When the unit is
powered up by connection of the transformer to the AC
line, the LED illuminates and remains illuminated as long
as power is applied to the unit. During data
transmissions, both LEDs blink to indicate data flow.
Baud Rate Settings
There is a two position DIP switch on the AD2081 front
panel located between the power connector and the
CPU RJ-45 jack. The words “baud rate” appear above
the switch, and the numbers “1” and “2” appear below.
Each of the two switches can be set in either the
Off
or
On
position. The table directly below indicates the
appropriate switch positions relative to system and
external device baud rate settings.
Switch 1
Position
Switch 2
Position
CPU
Baud
Rate
External Device
Baud Rate
on
on
38400
9600
on
off
19200
4800
off
on
9600
2400
off
off
4800
1200
External Devices
The AD2081 Port Expander connects between a system
CPU and the following external devices:
AD Keyboards
– connections from the Port Expander to
any one of the AD keyboards must be routed through
an 8 pin wall-mount terminal block. The terminal block is
required to accommodate connection to an external
transformer that provides power to the keyboard. Up to
four AD keyboards can be connected to a single
AD2081 Port Expander.
AD2010DBVL Modules
– when using the AD1024
system, up to four AD2010DBVL video loss detector
modules can be connected to an AD2081 Port Expander.
Video loss detector modules cannot be connected with
any other type of system device on a Port Expander.
Port use
must be set to
video loss
. Each AD2010DBVL
module is installed in an AD2010R bay with specific
camera assignments. For proper system operation, bay
camera assignments must correspond to the following
AD2081 port assignments:
AD2010R Camera
Assignments
AD2081 Port
Assignments
Cameras 1-256
Port A
Cameras 257-512
Port B
Cameras 513-768
Port C
Cameras 769-1024
Port D
AD2096A Alarm Interface Units
– If a CPU RS232 port
is not available for direct connection to an AD2096A
alarm interface unit (AIU), the AIU can be connected to
an AD2081 Port Expander that is being used with other
devices (such as AD keyboards). The AIU must be
connected to Port A on the AD2081 to insure proper
system recognition of the initial camera block connected
to the AIU. For system connections where both an AIU
and keyboards are connected to the same Port
Expander,
port use
must be set for
keyboard
.
Front Panel – AD2081 Port Expander
Rear Panel – AD2081 Port Expander
Ü
NO
