SMAG + MTAG SSI
4.4 Recommended transmission rates
The SSI interface has a frequency of data transmission ranging between 100 kHz
and 1.5 MHz.
The CLOCK signals and the DATA signals are transmitted according to the “EIA
RS-422” standard.
The clock frequency (baud rate) depends on the length of the cables and must
comply with the technical information reported in the following table.
Cable length
Baud rate
< 50 m
< 400 kHz
< 100 m
< 300 kHz
< 200 m
< 200 kHz
< 400 m
< 100 kHz
The time interval between two consecutive Clock sequence transmissions must
be at least 30 µs (Tp = pause time > 30 µs).
4.5 Recommended SSI circuit
MAN SMAG GA E 1.3.odt
4 – SSI interface
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