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Installation
optoNCDT ILR 1183
5.5
SSI Interface
Parameter settings for SSI interface operation can be made via the Profibus.
Default state set on initial product delivery: DT Mode.
Characteristics:
- Transfer rates from 50 kHz to 1 MHz, note the actual cable length.
- It provides a data length of 24 bits and uses Gray code.
-
The pause interval between two bit sequences is 200 μsec.
- All interface inputs are electrically isolated. They provide an isolation strength of 500 V.
Use screened twisted-pair cables for guaranteeing undisturbed data transmission.
This requirement is met by the cable type which you can find quoted in the optional accessories.
The following table shows selectable clock rates with corresponding cable lengths that must not be exceed-
ed:
Clock rate
Cable length
< 500 kHz
< 25 m
< 400 kHz
< 50 m
< 300 kHz
< 100 m
< 200 kHz
< 200 m
< 100 kHz
< 400 m
The sensor has a SSI data interface (SSI = synchronous serial interface). At the request of a SSI clock
generator, the sensor triggers a distance measurement cycle, sending the data bit by bit to a controller for
processing in the same order as it arrives at the shift register. This process occurs in the measuring mode
that was most recently stored in the sensor. A desired measuring mode can be selected via the Profibus.
The SSI interface works independently of the Profibus interface.
For SSI interface operation, the wiring diagram is as follows:
Summary of Contents for optoNCDT ILR 1183
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