5. External connections
5.7 Profibus interface
5.7 Profibus interface
The Profibus-DP-- interface is not electrically isolated.
CAUTION
NON-GALVANICALLY-ISOLATED INTERFACES
The XV300 may be damaged by potential differences.
The GND terminals of all bus modules must be connected.
Do not connect the connector to the XV300 or disconnect it without first de-
energizing the system.
SUB-D socket
9-pole
PIN
Signal
Description
1
n.c.
not assigned
2
n.c.
not assigned
3
B
EIA RS 485 cable B
4
RTSAS
Output for controlling a repeater
5
M5EXT (GND)
Output 0 V for external termination (Ground)
6
P5EXT
Output 5 V for external termination
7
n.c.
not assigned
8
A
EIA RS 485 cable A
9
n.c.
not assigned
Table 18: Pin assignment for Profibus DP, not galvanically isolated, SUB-D socket 9-pole,
UNC nuts for interlocking PROFIBUS interface
n.c.: PIN 1, 2,7 and 9 must not be connected.
PIN 6 (5 V) must not be used as a power supply for external devices.
5.7.0.1 Wiring
l
Screened twisted-pair cables must be used.
l
Cable type A (as specified in PROFIBUS standards IEC/EN 61158 and IEC/EN 61784)
must be used.
Cable specifications
Rated cable impedance
150 Ohm
Permissible impedance
135 … 165 Ohm
Capacitance per unit length
< 30 pF/m
Loop resistance
< 100 Ohm/km
Core cross-section
≥ 0.34 mm
2
(22 AWG)
The maximum baud rate depends on the cable length
Possible baud rates
With a max. cable length of
100 m
12000 kBit/s (12MBit/s)
200 m
1500 kBit/s
400 m
500 kBit/s
1000 m
187.5 kBit/s
1200 m
≤ 93.75 kBit/s
Table 19: Specifications for Profibus wiring
When preparing connections, ensure that the cable shield has a low
impedance connection with the connector housing.
XV300
12/15 MN048017 EN www.eaton.eu
57
Содержание XV300 Series
Страница 1: ...Manual 12 15 MN048017 EN XV300...
