Electrical connection
Leuze electronic GmbH + Co. KG
BPS 307i
50
Tab. 7.4:
Service USB pin assignment
Pin
Designation
Assignment
1
2
5
4
3
1
VB
Sense input
2
D-
Data -
3
D+
Data +
4
ID
Not connected
5
GND
Ground
NOTICE
Self-configured cables!
Ä
The entire USB interconnection cable must absolutely be shielded acc. to the USB specifi-
cations.
Ä
The maximum cable length of 3 m must not be exceeded.
7.6
Cable lengths and shielding
Observe the maximum cable lengths and the shielding types:
Connection
Interface
Max. cable length
Shielding
BPS service
USB
3 m
Shielding absolutely necessary
acc. to USB specifications
BPS power sup-
ply unit
30 m
Not necessary
Cable length according to the data rate
NOTICE
Data cables for the SSI interface!
Ä
Use only shielded and twisted-pair cables as data line for the SSI interface.
Twisting: pin 1 with 2, pin 3 with 4
The shield must be connected at both ends.
Ä
Do not lay the data line parallel to power cables.
The maximum possible cable length of the SSI connection is dependent on the used cable and the data
rate.
Tab. 7.5:
SSI cable lengths according to the data rate
Data rate
[kbit/s]
80
100
200
300
400
500
600
800
Maximum
cable
length
[m]
500
400
200
100
50
25
18
15