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1
INTERFACE SPECIFICATIONS
(when optional interface board is installed)
Connection
Sanyo digital video recorders support both straight type
and crossed type connection cables.
When using a straight type connection cable, connect the
RS-485 connector's pin A to the pin A socket, or pin B to
the pin B socket.
When using a crossed type connection cable, connect the
RS-485 connector's pin A to the pin B socket, or pin B to
the pin A socket.
Cable types
Straight type:
Not used
1
Not used
2
3
4
Not used
5
Not used
6
Crossed type:
Not used
1
Not
used
2
3
4
5
Not
used
6
Not used
Setting the RS-485 termination switch
Termination settings
When connecting multiple devices, you must make
termination settings on both end devices.
Set the RS-485 termination switch of the end device to
ON.
Be sure to set all non-termination devices (i.e., devices
other than the first and last devices) to OFF.
If you do not make the correct termination settings, data
will be reflected at both ends, affecting other data and
making the data transmitted to each device incorrect.
Example:
1
2
3
4
5
6
1
2
3
4
5
6
82
System controller
Multiplexer
Digital video
recorder
Digital video
recorder
ON
Termination
switch
OFF
ON
RS-485
termination
switch
OFF
OFF
ON
RS-485
termination switch
OFF
ON
RS-485
termination switch
English
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