REXROTH Fv Series, Instruction Manual

Page: 196 / 222

Cable
parameters
Type A Type B
Resistance ≤110 Ω/km ≤110 Ω/km
Conductor
cross secion
≥0.34 (22 AWG) ≥0.22 (24 AWG)
Fig.12-29: Type of PROFIBUS Adapter Cable
Standard Siemens PROFIBUS cable is (MLFB) 6XV1830-0EH10
(Type A), and connector is 6ES7972-0BA12-0XA0.
Relationship between Communication Rate and Cables
Relationship between adapter’s communication rate and cable length is de‐
scribed in fig. 12-30 "Relationship between Communication Rate and Cable
Length" on page 194 .
Baud rate
Maximum length for each ca‐
ble in m (Type A)
Maximum length for each ca‐
ble in m (Type B)
9.6 – 93.75 kbps 1000 1000
187.5 kbps 1000 600
500 kbps 400 200
1.5 Mbps 200 200
3 – 12 Mbps 100 100
Fig.12-30: Relationship between Communication Rate and Cable Length
EMC Measures
● Conductor of bus cable (signal cable) must be twisted, and shielded and
installed separately with electrical power cable with a distance of at least
20 cm. Bus cable shielding layer should be grounded at one end. Termi‐
nal PE at terminal block X2 is taken as connecting terminal of the shield‐
ing layer. The terminal PE is only valid at the 1 st pin of DB9 socket or
when DB9 metal cover is connected with the shielding layer of bus ca‐
ble.
● Conductors of communication connection cable (signal cable) for adapt‐
er and frequency converter must be twisted, and shielded and installed
separately at a reasonable distance. Shielding layer for communication
cable should be grounded at one end.
● Signal cable and electric power cable should be orthogonal in case of
crossing.
● Signal cable should be as short as possible.
● Large area is required for the connection of shielding layer.
Bosch Rexroth AG DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv
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Communication Protocols