ILX56-PBS
PROFIBUS DP
ControlLogix® Platform
User Manual
Page 68 of 87
PROFIBUS DP cable description
Only one type of cable can be used for PROFIBUS network:
Parameter
Type A
Surge Impedance
135…165Ω
(3 to 20 MHz)
Capacity
<30 pF/m
Loop Resistance
<110 Ω/km
Wire gauge
>0.64 mm
Conductor area
>0.34 mm²
Table 9.2
– PROFIBUS DP network cable
The maximum cable length depends on the transmission speed and cable type. The specified
cable length can be increased using the repeaters. The use of more than 3 repeaters in series
is not recommended.
Baudrate
(kbps)
9.6
19.2
93.75
187.5
500
1500
3000-
12000
Length A (m)
1200
1200
1200
1000
400
200
100
Table 9.3
– PROFIBUS DP cable length
PROFIBUS DP connector description
DB9 Pin Description
DB9 Pin#
DB9 Termination with ILX56-PBS
Chassis ground
1
Reserved
2
Data+ / B
3
In case of termination connect this pin to Pin 8
(Data - / A) with 220 ohm resistor
Tx enable
4
Isolated ground
5
Connect this pin to Pin 8 (Data - / A) with 390
ohm resistor
Voltage plus
6
Connect this pin to Pin 3 (Data + / B) with 390
ohm resistor
Reserved
7
Data- / A
8
Reserved
9
Table 9.4
– PROFIBUS DP connector
