WABCO OptiTire System Description page 34

Components
Cable set assignment
Cable set "Towing vehicle 7-pin" 894 607 390 0
Cable set "Towing vehicle 5-pin" 894 607 295 0
Cable set "Trailer"
34
CONNECTOR PLUG
PIN NO. ALLOCATION
2 CAN high
1 CAN low
8 GND
7 +24 V or 12 V
6 Ignition
Stop light / warning
4
lamp 2
3 Warning lamp 1
!
Connection to +12 V/24 V and ignition must be fused with 5 ampere fuses.
Since OptiTire has a low current consumption an existing fused circuit can
TM
normally be integrated as well.
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.
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.
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".
CABLE COLOUR CABLE COLOUR
5-PIN 7-PIN
blue blue
red red
yellow & grey grey
yellow
green