REXROTH Fv Series, Instruction Manual

Page: 195 / 222

Fig.12-26: Terminal resistor swich S1
Adapter Terminal Configuration
Fig.12-27: Bus connection terminal PROFIBUS DB9
Pin No. Terminal sign Terminal name Function description
1 PE
Terminal of bus cable
shield
Connects with bus cable
shield
2 NC ‑ Reserved
3 PROFIBUS_B PROFIBUS terminal_B PROFIBUS data cable B
4 RTS Request for signal sending ‑
5 GND Power- ‑
6 Vcc Power+ ‑
7 NC ‑ Reserved
8 PROFIBUS_A PROFIBUS terminal_A PROFIBUS data cable A
9 NC ‑ Reserved
Fig.12-28: Definition of PROFIBUS DB9 Pins
Requirements for PROFIBUS Link
Cable used is shielded twisted pair cable. The shield is able to improve elec‐
tromagnetic 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 definitions stated in fig. 12-29 "Type of PROFIBUS Adapter Cable" on
page 193 .
Cable
parameters
Type A Type B
Impedance 135 Ω – 165 Ω (f=3 MHz – 20 MHz) 100 Ω – 130 Ω (f>100 kHz)
Capacity <30 pF/m <60 pF/m
DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv Bosch Rexroth AG 193/219
Communication Protocols