Mounting and wiring
BC5250
23
Version: 2.0.0
Baud rate
Drop line length
Total length of all drop lines
500 kbit/s
< 5 m
< 25 m
250 kbit/s
< 10 m
< 50 m
125 kbit/s
< 20 m
< 100 m
Drop lines must not have termination resistors.
Fig. 13: Sample topology of drop lines
3.2.4.4
Star hub
Star Hub (Multiport Tap)
Shorter drop line lengths must be maintained when passive distributors ("multiport taps"), such as the
Beckhoff ZS5052-4500 Distributor Box. The following table indicates the maximum drop line lengths and the
maximum length of the trunk line (without the drop lines):
Baud rate
Drop line length with multiport
topology
Trunk line length (without drop
lines)
500 kbit/s
< 1,2 m
< 66 m
250 kbit/s
< 2,4 m
< 120 m
125 kbit/s
< 4,8 m
< 310 m
3.2.4.5
DeviceNet cable
Screened twisted-pair cables (2x2) with a characteristic impedance of between 108 and 132 Ohm is
recommended for the CAN wiring.
ZB5200 CAN/DeviceNet Cable
The ZB5200 cable material corresponds to the DeviceNet specification, and is also suitable for CANopen
systems. The ready-made ZK1052-xxxx-xxxx bus lines for the Fieldbus Box modules are made from this
cable material. It has the following specification:
• 2 x 2 x 0.34 mm² (AWG 22) twisted pairs
• double screened · braided screen with filler strand
• characteristic impedance (1 MHz): 126 ohm
• Conductor resistance 54 Ohm/km
• sheath: grey PVC, outside diameter 7.3 mm
• printed with "InterlinkBT DeviceNet Type 572" as well as UL and CSA ratings
• stranded wire colors correspond to the DeviceNet specification
• UL recognized AWM Type 2476 rating
• CSA AWM I/II A/B 80 °C 300 V FT1
• corresponds to the DeviceNet "Thin Cable" specification