Installing The Local Bus; Connecting Solenoids And Sensorics - Bosch Rexroth VT-VPCD Series Operating Instructions Manual

32/60 Installation
Branch line
d24
max. 1 m
Solenoids of the
proportional valve
Bosch Rexroth AG, VT-VPCD, RE 30028-B/09.13
Hyquip Limited New Brunswick Street Horwich Bolton Lancashire BL6 7JB UK
Company Registered in England No: 4167649 VAT Registration No: 732 5692 25 BS EN ISO 9001:2008 No: LRQ 0964389

7.5.1 Installing the local bus

The local bus provides the connection between the individual electronics of the
HACD family.
You can use the local bus to configure another card connected to the local bus
with the help of Bodac.
However, never send firmware over the local bus to another electronics card to
update the latter.
You can connect up to 32 stations. A clear bus address must be assigned to each
control electronics.
The connection is established using a CAN protocol with a baud rate of 250 kbit.
The maximum length of the most distant control electronics must not exceed 280 m.
Moreover, the maximum length of the branch lines of 1 m must be observed.
The data are transmitted over a shielded twisted-pair cable.
For the setup, two bus terminal resistors of 120 Ohm are required.
Max. length = 280 m
d28
d24 d28
z10
ID 1 ID 2
Fig. 14: Schematic structure of "local bus"

7.5.2 Connecting solenoids and sensorics

▶ Lay solenoid cables of the proportional valve separately, away from other cables;
in particular, they must be separated from cables of the inductive position
transducers.
We recommend the use of shielded solenoid cables. Recommended cable type:
2
LiYCY 1.5 mm up to 50 m length.
When double-shielded cable is used, the outer shield can be terminated at the
entry into the control cabinet, the inner shield can be terminated at the control
electronics.
+44 (0)1204 699 959
enquiries@hyquip.co.uk
www.hyquip.co.uk/web/index
Bus
d24
terminating
z10
resistor
d28
z10
ID 32