DR128 SysNet
Fitting Instructions
AP3165 issue 4
ALLEN
&
HEATH DR128 SYSNET OPTION
Fitting Instructions AP3165
Introduction
Certain functions of the DR128 can be remotely controlled using a simple protocol over an RS232 serial
link. This lets you use it with third party controllers such as touch screen displays and wall panels.
The SysNet option is a kit of parts which is fitted to the DR128 to provide an additional serial port running
the required version of SysNet protocol. The remote controller needs to be programmed to communicate
with the DR128 using this protocol. A copy of the protocol specification can be downloaded from the Allen
& Heath web site.
Two versions of SysNet operating system are available, one for Version 1 DR operating software, the
other for Version 2. Both are supported with this kit. It is important that the correct version and protocol
are used. This affects the parts fitted to the option card. Refer to the notes below on version
compatibility.
Installation is a straightforward process requiring removal of the top cover, fitting the internal option card
and plugging on the cable harness supplied. Please read these fitting instructions carefully before starting
and heed the precautions noted for trouble free installation and use.
Important Notes on Version Compatibility
If your DR128 is running
DR Version 2.1n
(n = any number) or greater then the SysNet
V4
firmware and
V6.1
protocol must be used. For example, this applies to WinDR V2.11. A SysNet card may not be
required as the standard DR128 RS232 port can be used to interface with the controller. However, if you
are already using the RS232 port to connect to your PC and wish to have simultaneous SysNet control
then you should fit the option card to provide the additional port. A SysNet card fitted with the V4 PIC
(programmable integrated circuit) is required. The card is fitted with this PIC when shipped.
If your DR128 is running
DR Version 1.nn
then the SysNet
V2
firmware and
V5
protocol must be used.
For example, this applies to WinDR V1.83. The fitted V4 PIC should be replaced with the V2 version
packed separately in the kit.
The latest V5 and V6.1 SysNet protocol documents and version information can be downloaded from the
Allen & Heath web site:
http://www.allen-heath.com
. This information is required when programming the
remote controller.
Controllable Functions
V5 Protocol
WinDR V1.xx :
V6.1 Protocol
WinDR >V2.1x :
y
Input and Output Channel Levels
y
Input and Output Channel Levels
y
Crosspoint Matrix Levels
y
Crosspoint Matrix Levels
y
Patch Recalls
y
Patch Recalls
y
Input and Output Mutes
The Interface Port
The SysNet card provides a standard RS232 style 9pin female D-type connector. The V6.1 protocol runs
at 19200 baud. The V5 protocol runs at a slower 9600 baud. The physical interface uses three wires RX,
TX and ground. No handshake lines are required.
Pin 2
SysNet TX
Pin 3
SysNet RX
Pin 5
Ground
Handling Precautions
The SysNet card contains sensitive integrated circuits which can be damaged by static discharge from
human body contact. The card is packed in an anti-static conductive bag to protect it during shipment.
To avoid damaging the static sensitive components on the card make sure you discharge any static
electricity from your body and any tools you use. One way to do this is to touch the grounded bare metal
of the DR128 chassis. To reduce the risk wear a grounded wrist strap. Handle the card by its edges
only. If you need to replace the PIC (firmware) make sure you do not touch its pins.
