PLX51-PBM
PROFIBUS DP
PROFIBUS DPV0/DPV1 Master or Slave to EtherNet/IP™ or Modbus® Gateway
User Manual
ProSoft Technology, Inc.
Page 192 of 196
10.7
PROFIBUS DP Cable Description
Only one type of cable can be used for PROFIBUS network:
Table 9.2
– PROFIBUS DP network cable
Parameter
Type A
Surge Impedance
135 to
165Ω
(3 to 20 MHz)
Capacity
<30 pF/m
Loop Resistance
<110 Ω/km
Wire gauge
>0.64 mm
Conductor area
>0.34 mm²
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.
Table 9.3
– PROFIBUS DP cable length
Baudrate (kbps)
9.6
19.2
93.75
187.5
500
1500
3000-
12000
Length A (m)
1200
1200
1200
1000
400
200
100
10.8
PROFIBUS DP Connector Description
Table 9.4
– PROFIBUS DP connector
DB9 Pin Description
DB9 Pin#
DB9 Termination with PLX51-PBM
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
