SSI interface
54
AMS 307
i
Leuze electronic GmbH + Co. KG
9.1.2
Cable length depending on the data rate
Only shielded and twisted pair cables (pin 1 with 2 and pin 3 with 4) are permitted as data
lines for the SSI interface (see chapter 9.2 "SSI - electrical connection").
The shielding must be connected at both ends.
Do not lay the cable parallel to power cables.
The maximum possible cable length is dependent on the cable used and the clock rate:
Table 9.1:
Max. cable length as a function of the clock rate
9.2
SSI - electrical connection
Figure 9.2: SSI - electrical connection
Note!
To connect the SSI interface, we recommend our ready-made SSI cables; see Chapter
Data rate
80kBit/s 100 kBit/s 200 kBit/s 300kBit/s 400 kBit/s 500 kBit/s 1.000 kBit/s
Max. cable length (typical)
500m
400m
200m
100m
50m
25 m
10 m
SSI
CLK+ 3
2
1
4
FE
DATA-
CLK-
DATA+
5
SSI connector (5-pin plug, B-coded)
Pin
Name
Comment
1
DATA+ + Data line SSI (output)
2
DATA- - Data line SSI (output)
3
CLK+
+ Clock line SSI (input electrically insulated)
4
CLK-
- Clock line SSI (input electrically insulated)
5
FE
Functional earth
Thread
FE
Functional earth (housing)