SSI
Leuze electronic
AMS 304
i
94
TNT
35/7-2
4
V
10.1.2
Cable length as a function of the data rate
Only shielded and twisted pair
lines (pin 1 with 2 and pin 3 with 4) are permitted as data
lines for the SSI interface (see chapter 10.2 "SSI - Electrical connection").
ª
The shielding must be connected at both ends.
ª
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 10.1:
Max. cable length as a function of the clock rate
10.2
SSI - Electrical connection
Figure 10.2: SSI - electrical connection
Notice!
To connect the SSI interface we recommend our ready-made SSI cables, see "PROFIBUS
and SSI connection cable order codes" on page 105.
Data rate
80 kBit/s
100 kBit/s
200 kBit/s
300 kBit/s
400 kBit/s
500 kBit/s
1,000 kBit/s
Max. cable length (typical)
500 m
400 m
200 m
100 m
50 m
25 m
10 m
SSI
CLK+ 3
2
1
4
FE
DATA-
CLK-
DATA+
5
SSI connector (5-pin plug, B-coded)
Pin
Name
Remark
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)
