36/48 Installation
Bosch Rexroth AG
, 4WRPD(H), 4WRPQ(H), 4WRPF(H), 4WRLD, 4WRLF, 4WRLQ, 5WRPF10, 5WRPQ10; RE 29391-B/05.2021
As supply voltage of the valve, functional low voltages with electric separation
(PELV or SELV) according to VDE0100, Part 410 have to be used.
For the external voltage supply, it must be ensured that, even in error cases, the
voltage limitation defined for the valve is not exceeded. PELV power supply units
according to EN 60204, section 6.4.2 comply with these requirements.
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Only connect voltages and electric circuits provided with safe isolation from
dangerous voltages. Safe isolation can be achieved with isolation transformers,
safe optocouplers or mains-free battery operation.
When calculating the PFH (probability of dangerous failure per hour) of the
safety function, the PFH of the external voltage supply must also be taken into
account.
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Keep the connection as short as possible. Please observe the detailed
information on voltage supply in the respective valve data sheet.
When supplying a 24 V encoder, the input voltage of the valve with IAC Multi-
Ethernet must comply with the encoder requirements (e.g. 24 V ±5%, residual
ripple <500 mV). With IAC Multi-Ethernet, analog components such as pressure
cells can be supplied directly via the sockets X2M1 or X2M2 - and with IFB
Multi-Ethernet, via X2M (optional).
Precondition: The supply of the valve complies with the requirements of the
pressure cell. Further notes with regard to currents, etc. are available in the
valve-specific data sheet.
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For signal cables, use only cables with a copper braid shield. Connect the cable
shield extensively with the metallized connector housing and only on the
Multi-Ethernet electronics side.
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The Ethernet cable must at least comply with the CAT5e standard.
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Do not route signal cables through strong magnetic fields.
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Lay signal lines as continuously as possible. If intermediate terminals are
required, use a terminal block with shield busbar. Load lines consisting of two
individual wires (e.g. voltage supply) must be laid in parallel or twisted.
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Cables should only have the actually required number of wires. If this is not
possible, the wires have to be connected with each other and then to the earth
on one side in the control cabinet.
In case of faulty IAC Multi-Ethernet signals, please refer to troubleshooting of other
electrical IAC/IFB components, e.g. as follows:
• Switched inductance:
– DC: antiparallel free-wheeling diode over actuator winding
– AC: type-related R/C combination over actuator winding.
• Electric motors
– R/C combination from each motor winding to earth.
• Frequency converter
– Inlet filter in the voltage supply of the frequency converter
– Motor control line shielded and laid separately from other lines, and/or output
filter for motor lines.
Voltage supply
Supply of external
components
Shielding
General notes on wiring
Suppressing interference
of the system
