WABCO OptiTire, System Description

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Components Components
Cable set assignment
PIN NO.
CONNECTOR PLUG
ALLOCATION
CABLE COLOUR
5-PIN
CABLE COLOUR
7-PIN
2 CAN high
1 CAN low
8 GND blue blue
7 +24 V or 12 V red red
6 Ignition yellow & grey grey
4
Stop light / warning
lamp 2
yellow
3 Warning lamp 1 green
!
Connection to +12 V/24 V and ignition must be fused with 5 ampere fuses.
Since OptiTire
TM
has a low current consumption an existing fused circuit can
normally be integrated as well.
Cable set "Towing vehicle 7-pin" 894 607 390 0
The 7-pin wiring is provided in accordance with the cable set (WABCO part
number: 894 607 390 0)

see figure "Towing vehicle wiring".
Pin assignment on the connecting plugs corresponds to the 5-pin variant.
In addition, either a connection to the stop light (for synchronising with the trailer
ECU) or connection of one or two warning lamps is possible.
Cable set "Towing vehicle 5-pin" 894 607 295 0
A simpler wiring (WABCO part number: 894 607 295 0) is provided as a 5-pin
variant for retrofitting in buses.
Employment of this wiring allows driving of warning lights inside display or via
CAN respectively but not separate warning lights on dashboard.
Cable set "Trailer"
Information about the different interconnections with CAN-capable systems
(with Trailer EBS)

see chapter 4.2 "Configuration for bus and towing vehicle",
page 13 and

see chapter 4.3 "Configuration for trailers", page 15.
If only the radio link is to transmit data to the towing vehicle, the cable (WABCO
part number: 449 674 XXX 0) is used

see figure "Trailer wiring".