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Bosch Rexroth AG
Electrical Installations
Pin No.
Terminal sign
1
2
3
PROFIBUS_B
4
5
6
7
8
PROFIBUS_A
9
Tab. 5-3: Definition of PROFIBUS DB9 pins
5.3 Requirements to PROFIBUS link
Cable used is shielded twisted pair cable. The shield is able to improve electro-
magnetic compatibility (EMC) ability. Unshielded twisted pair cable may be
used if there is less electromagnetic interference (EMI).
Impedance of the cable should be within 100 Ω to 200 Ω. Cable capacity
(among conductors) should be < 60 pF/m, and conductor cross section should
be ≥0.22 (24 AWG). Two kinds of cables are used for PROFIBUS with detail defi-
nitions stated as below:
Cable parameters
Impedance
Capacity
Resistance
Conductor cross sec-
tion
Tab. 5-4: Type of adapter cable
standard Siemens PROFIBUS cable is (MLFB) 6XV1830-0EH10 (Type
A), and connector is 6ES7972-0BA12-0XA0.
18/35
NC
–
NC
–
PROFIBUS terminal_B
RTS
Request for signal sending
GND
Power-
Vcc
Power+
NC
–
PROFIBUS terminal_A
NC
–
Type A
135 Ω – 165 Ω
(f = 3 – 20 MHz)
﹤ 30 pF/m
≤110 Ω/km
≥0.34 (22 AWG)
PROFIBUS-DP Bus Adapter
Terminal name
Reserved
Reserved
PROFIBUS data cable B
–
–
–
Reserved
PROFIBUS data cable A
Reserved
DOK-RCON01-PROFIBUS***-IB04-EN-P
Function description
Type B
100 Ω – 130 Ω
(f ﹥ 100 kHz)
﹤ 60 pF/m
≤110 Ω/km
≥0.22 (24 AWG)
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