Connection
Page 4 AVP RS-232 Quick Guide
RS-232 Control
Cable
Madrigal Audio Labs offers several parts to help communicate via RS-232 to the
AVP. The following parts can be order from Madrigal Audio Labs Technical Support.
Part # Description
MRC878 DSUB9 to RJ-11 Adaptor and 2 meter RJ-11 to
RJ-11 Cable
MRC808 DSUB9 to RJ-11 Adaptor
MLC732 2 meter RJ-11 to RJ-11 Cable
(Length of Cable RJ-11
to RJ-11)
RJ-11 to RJ-11 cable required length
For general purpose and short cable runs to the AVP, Part # MRC878 contains
everything needed.
For cable lengths of more then 2 meters - Part # MRC808 and the length of cable
needed should be ordered.
RS-232 control units with port types other then DSUB9 will need to have the cable
constructed. To construct a cable please follow the example below.
Control Cable
Example
As an example on making the cable we will use the most common connector used,
which is a DSUB9. The AVP only needs 3 pins to control the unit via RS-232. As
mentioned earlier the AVPs pin 2 Data Receive must connect to the control devices
Transmit. Please read the notes below before constructing the RS-232 cable.
q Verify Control Devices RS-232 Port Type and Configuration – Refer to Control
Device Owners Manual
q Determine length of cable needed – Check the control device owners manual for
length limitations
q Have all available parts
Before
Constructing
the
Communicati
on Cable
o Length of Cable needed
o RJ-11 Connector
o RJ-11 Crimp tool
o Connector type used by RS-232 device
Cable Layout
The following diagram shows how to construct a basic DSUB9 to RJ-11 Cable.
Cable
Connections
AVP RJ-11
Pins
Controller DSUB9
Pins
1 – NOT USED
NO CONNECTION
2 – Data Receive
−−−−−Connect to−−−−−
3 – Data Transmit
3 – Data Transmit
−−−−−Connect to−−−−−
2 – Data Receive
4 – NOT USED
NO CONNECTION
5 – Digital Ground
−−−−−Connect to−−−−−
5 – Digital Ground
6 – NOT USED
NO CONNECTION
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