Mounting and wiring
BC5250
24
Version: 2.0.0
Fig. 14: Structure of CAN/DeviceNet cable ZB5200
3.2.4.6
Shielding
The shield is to be connected over the entire length of the bus cable, and only galvanically grounded at one
point, in order to avoid ground loops.
The design of the screening, in which HF interference is diverted through R/C elements to the mounting rail
assumes that the rail is appropriately earthed and free from interference. If this is not the case, it is possible
that HF interference will be transmitted from the mounting rail to the shield of the bus cable. In that case the
shield should not be attached to the couplers - it should nevertheless still be fully connected through.
Notes related to checking the CAN wiring can be found in the Trouble Shooting section.
3.2.4.7
Cable colors
Suggestion for using the Beckhoff DeviceNet cables at the Bus Terminal and the Fieldbus Box:
BK52x0 pin
BX5200 (X520) PIN
Fieldbus Box pin FC520x pin
Function
ZB5200 cable color
5
2
5
V+(red)
red
4
4
4
CAN high (CAN+,
white)
white
3
1
3
SHIELD
Filler strand
2
5
2
CAN low (CAN-, blue)
blue
1
3
1
V- (black)
Black
3.2.4.8
FC520x: 5-pin open style connector
The DeviceNet bus line is connected to the FC5201 and FC5202 DeviceNet PCI cards via 5-pin open style
connectors with the following pin assignment.
Pin
Assignment
5
V+(red)
4
CAN high (CAN+, white)
3
SHIELD
2
CAN low (CAN-, blue)
1
V- (black)
The unlisted pins are not connected.
Note: an auxiliary voltage up to 30 V
DC
may be connected at pin 9 (some CAN devices use this for supplying
the transceivers).