Electric Drives Linear Motion and and Controls I Hydraulics I Assembly Technologies RexrothBosch Group 4/2- and 4/3-way proportional directional valves, direct operated, without electrical position feedback, without/with integrated electronics (OBE) Types 4WRA and 4WRAE Nominal sizes 6 and 10 Component series 2X Maximum operating pressure Maximum flow: 42 Type 4WRAE 6 ...-2X/G24K31/.V Typ 4WRA 10 ...-2X/G24...K4/V with integrated electronics (OBE) with plug-in connectors and associated control electronics (separate order) Overview of contents Features Contents Page Electrical connections, plug-in connectors 7 Integrated electronics (OBE) for type 4WRAE 8 - Direct operated proportional directional valve without electrical position feedback and integrated electronics (OBE) for - Control the direction and magnitude of a flow - Actuation by means of proportional solenoids with central thread and removable coil Subplates to catalogue sheets RE 45052 (NS6) or RE 45054 (NS10) separate order, see page 12 to 15 - Spring centred control spool - Control electronics - integrated electronics (OBE) with voltage input or current input (A1 resp. F1) - digital or analogue amplifier in Eurocard format (separate order) - analogue module amplifier For information regarding the available spare parts see: www.boschrexroth .com/spc

Bosch Rexroth AG | Hydraulics Without integrated With integrated Spool symbols Nominal size 6 Nominal size 10 With spool symbols E1- and W1-: With spools W and WA, in the neutral position, there is a connection from A to T and B to T with approx. 3 % of the relevant nominal crosssection. Further details in clear text Seal material A1 = Command value input ± 10 V F1 = Command value input 4 to 20 mA No code = For 4WRA K4 2) = Without plug-in connector, with component plug to DIN EN 175301-803 plug-in connector - separate order, see page 7 K31 2) = Without plug-in connector, with component plug...

Hydraulics Bosch Rexroth AG Symbols Without integrated electronics With integrated electronics (OBE)

Function, section The 4/2- and 4/3-way proportioanl directional valves are designed as direct operated components for subplate mounting. They are actuated by means of proportional solenoids with central thread and removable coil. The solenoids are controlled either by external control electronics (type 4WRA) or by integrated control electronics (type 4WRAE). Design: The valves basically consist of: – Housing (1) with mounting surface – Control spool (2) with compression springs (3 and 4) – Solenoids (5 and 6) with central thread – Optional integrated electronics (7) Function: – With the solenoids...

Hydraulics | Bosch Rexroth AG Technical data (for applications outside these parameters, please consult us!) Max. permissible flow with a dual flow path The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from occurring and at the same time increases the component service life. For the selection of filters see catalogue sheets RE 50070, RE 50076, RE 50081, RE 50086 and RE 50088.

Bosch Rexroth AG | Hydraulics Technical data (for applications outside these parameters, please consult us!) \0T Note: For details regarding the environmental simulation test covering EMC (electromagnetic compatibility), climate and mechanical loading see RE 29055-U (declaration regarding environmental compatibility). Due to the occurring surface temperature of the solenoid coils, the European Standards DIN EN 563 and DIN EN 982 must be taken into account! Separate order With Bosch Rexroth AG control electronics

Hydraulics Bosch Rexroth AG Electrical connection, plug-in connectors For type WRA (without integrated electronics – not for version "J" = sea water resistant) Connection on component plug Connection on plug-in connector Plug-in connector CECC 75 301-803-A002FA-H3D08-G to DIN EN 175301-803 or ISO 4400 Solenoid a, colour grey Separate order: Material No. R901017010 Solenoid b, colour black Separate order: Material No. R901017011 1 Fixing screws M3 Tightening torque MA = 0.5 Nm For type WRAE (with integrated electronics (OBE) and for version "J" = sea water resistant) For pin allocation, see block...

Bosch Rexroth AG | Hydraulics Integrated electronics (OBE) for type WRAE Pin allocation of the component plug Integrated control electronics (see below) Com. value: Positive command value (0 to 10 V or 12 to 20 mA) at D and reference potential to E causes flow from P to A and B to T. Negative command value (0 to - 10 V or 12 to 4 mA) at D and reference potential to E causes flow from P to B and A to T. For valves with a solenoid on side „A“ (spool variants EA and WA) a positive command value at D and reference potential to E (NS 6: 4 to 20 mA and NS 10: 12 to 20 mA) causes flow from P to B and...

Hydraulics | Bosch Rexroth AG 9/16 Characteristic curves (measured with HLP46, $oil = 40 °C ± 5 °C) Ap = Valve pressure differential (inlet pressure pP minus load pressure pL and minus return pressure pT) Characteristic curves (measured with HLP46, $oil = 40 °C ± 5 °C) Ap = Valve pressure differential (inlet pressure pP minus load pressure pL and minus return pressure pT)

Characteristic curves (measured with HLP46, ϑoil = 40 °C ± 5 °C) Transient functions with stepped form of electrical input signals Types 4WRA and 4WRAE Signal change in % 0 – 100 Performance limit, nominal flow 7 l/min Performance limit, nominal flow 15 l/min 250 100 150 200 Valve pressure differential in bar → 250 100 150 200 Valve pressure differential in bar → Performance limit, nominal flow 30 l/min 50 50 100 250 150 200 Valve pressure differential in bar → 5 Com. value = 80 % 6 Com. value = 90 % 7 Com. value = 100 % If the performance limits are exceeded then flow forces

Hydraulics | Bosch Rexroth AG 11 /16 Characteristic curves (measured with HLP46, $oil = 40 °C ± 5 °C)Transient functions with stepped form of electrical input signals Signal change in % Performance limit, nominal flow 60 l/min P ^ A / B ^ T or If the performance limits are exceeded then flow forces occur which lead to uncontrolled spool movements.