BPW ECO Tronic EBS Operating And Installation Instructions page 19

2.1.2 4S/3M
(recommended for self-steering axle)
Fig. 21
• Any axle without directly controlled wheels may be lifted.
• Any axle can be a steered axle.
• Master ECU is mounted to EPRV's. All sensors must be
connected to this Master ECU.
• Directly controlled wheels connected pneumatically to
EPRV's 21/22 cannot be lifted.
• Slave ECU is mounted to EPRV 2 and is controlled by Master
ECU. Slave ECU/EPRV 2 is shown facing rear but can also
be installed facing forward, left or right, as EPRV 2 is always
select low control.
• Sensed wheel connected pneumatically to EPRV 2 can be
lifted.
2.1 Semi and centre axle drawbar trailers
S1B S2B
21
2
22
S1A S2A
S1B S2B
21
2
22
S1A S2A
S1B S2B
22
2
21
S1A S2A
S1B S2B
22
2
21
S1A S2A
S1B S2B
21 2
22
S1A S2A
S1B S2B
21
2
22
S1A S2A
S1B S2B
22
2
21
S1A S2A
S1B S2B
22
2
21
S1A S2A
Key
22
Modulators
21
ECU power connectors
Slave ECU
2
Modulator
S2B
S1B
2 21
22
S1A S2A
S1B S2B
2 21
22
S1A S2A
S1B
S2B
22
2
21
S1A S2A
S1B
S2B
22
2
21
S1A S2A
19