Serial Connection Details - Redback A 4450 Operating Manual

19.0 SERIAL CONNECTION DETAILS

RS232 command codes can be transmitted from a PC or Laptop by connecting a lead such as the Altronics S 9721 (USB To
RS-485 Converter) to the USB port. The transmission from this lead is converted to RS485 which makes it compatible for
input to the A 4450.
The output of the S 9721 can then be wired to the Adapter port on the rear of the A 4450. Pin 5 (RS485-A), pin 4
(RS485-B) and pin 8 (ground) of a standard Cat5 cable are the only connections requiring termination.
Pin 5 connects to the (+) connection of the S 9721, pin 4 connects to the (-) connection and pin 8 connects to the centre
ground connection (refer to figure 15).
24V 24V
DC In DC In
+ _
- +
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Redback
Fig 14. Altronics S 9721 USB To RS-485 Converter
Wall Plates Console 2
Made in Australia
by Altronic Distributors
www.redbackaudio.com.au
DIP 4
1 2 3 4
Micro 1 2 3 4 Adapter
Console 1
SD Card
RS-485
Communication
To third party serial controller.
E.g. PC/Laptop or other serial output device.
(see section 18 for protocol and connection details).
Fig 15. Serial connection from a PC to the A 4450.
A 4450 4 x 4 Audio Matrix/Switcher
®
Outputs
L L
DIP 3
R
R
1 2 3 4
Aux Out 4 1 2 3 4 Aux Out 3 Aux out 2
RS485-B (Pin 4)
USB/RS-485
CONVERTER
RS485-A (Pin 5)
Redback® Proudly Made In Australia
Input 4 Input 3 Input 2
L L L L
DIP 2 DIP 1
R R R R
1 2 3 4 1 2
Aux Out 1 Aux In 4 1 2 3 4 Aux In 3 Aux In 2 1 2 3 4
GND (Pin 8)
Input 1
L
R
3 4
Aux In 1
19