20/48
Safety instructions
Bosch Rexroth AG
, 4WRPD(H), 4WRPQ(H), 4WRPF(H), 4WRLD, 4WRLF, 4WRLQ, 5WRPF10, 5WRPQ10; RE 29391-B/05.2021
2.7.9 Connection example/block diagram for direct operated valves with one
solenoid
For type III according to EN 201:2009, two separate switch-off paths are required.
The following overview illustrates a realization example of a switch-off path for an
injection molding machine with direct operated valve with one solenoid on Multi-
Ethernet basis. For the second switch-off path, an additional suitable valve is
required. For this application, the specific requirements of EN 201:2009 are to be
complied with.
The connection example only shows the safety-relevant signals of the Multi-
Ethernet electronics. For all other signals and interfaces, refer to the valve-specific
data sheets.
Fig. 1: Block diagram for direct operated valves with one solenoid
a
0
b
A B
P T
b
G
U
(1236)
= 8+4
(ABCD)
= 6+PE
1, 2, 3, 8
are safety-relevant
connections of the 11+PE connector of
the valve on Multi-Ethernet basis; for
additional connections, see valve data
sheet.
(Values in brackets: connections
when using a 8+4 connector and when
using a 6+PE connector)
Hydraulics
actuator side
PELV/SELV
24 V mains adaptor
according to
VDE0100
part 410
Enable signal
that can be
switched off
safely
Enable
3
(3)(D)
1
(1)(A)
2
(2)(B)
24 V
(18...36 V)
GND
Inputs
Multi-Ethernet
electronics
Outputs
Enable acknowledgement
Hydraulics supply side
8
(6)(C)
