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e00_VDH_M814.book Page 68 Thursday, October 28, 2004 9:59 AM
2. RS-485 SPECIFICATIONS
Data format
Mode
Asynchronous
Character length
8 bits
Data transmission
2400, 4800, 9600, 19200 bps
speed
Parity check
None
Stop bit
1
Communication protocol
A proprietary Sanyo protocol (SSP: Security Serial
Protocol) is used. Use of a special controller for operation is
recommended. To obtain this controller, contact your local
dealer or a Sanyo service center.
RS-485 termination switch settings
Termination settings
When connecting multiple devices, you must make
termination settings on both end devices.
Set the RS-485 termination switch of both end devices
to ON.
Be sure to set the RS-485 termination switches of all
devices in between (devices other than the first and last
devices) to OFF.
If you don't make the correct termination settings, data will
be distorted and will affect other data, making the data
transmitted to each device incorrect.
Example
Time-lapse VCR
Digital video recorder
TERMINATE
Time-lapse VCR
ON
Termination
switch
OFF
ON
RS-485
OFF
ON
Termination
switch
OFF
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