Sanyo DSR - 300 Manual Do Utilizador
INTERFACE SPECIFICATIONS
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82
English
(when optional interface board is installed)
INTERFA
C
E
S
P
E
C
IFICATIONS
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.
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:
Crossed type:
Termination settings
When connecting multiple devices, you must make
termination settings on both end devices.
z
termination settings on both end devices.
z
Set the RS-485 termination switch of the end device to
ON.
ON.
z
Be sure to set all non-termination devices (i.e., devices
other than the first and last devices) to OFF.
other than the first and last devices) to OFF.
z
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.
will be reflected at both ends, affecting other data and
making the data transmitted to each device incorrect.
Example:
Setting the RS-485 termination switch
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2
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4
5
6
2
3
4
5
6
1
2
3
4
5
6
2
3
4
5
6
Not used
Not used
Not used
Not used
Not used
Not used
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2
3
4
5
6
2
3
4
5
6
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2
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6
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Not used
Not used
Not
used
Not
used
System controller
Termination
switch
Multiplexer
Digital video
recorder
ON
OFF
ON
OFF
RS-485
termination
switch
ON
OFF
Digital video
recorder
RS-485
termination switch
RS-485
termination switch
ON
OFF
e00_l8had_us_7.book Page 82 Wednesday, March 10, 2004 2:47 PM