Bosch Rexroth R901237555

Set-up: The valve basically consists of:

• Housing (1) with connection surface

• Control spool (2) with compression springs (3 and 4) and spring plates (8 and 9)

• Coils (5 and 6) and pole tubes (10 and 11) with central thread

• Position transducer (7)

• Integrated digital control electronics IFB-P (12)

Functional description With de-energized solenoids (5 and 6), the control spool (2) is brought into the central position by compression springs (3 and 4) between the spring plates (8 and 9) (with V control spool without spring plate). With V control spools, the mechanical zero position does not correspond to the hydraulic one. Functions:

• Control of the valve spool position

• The command value presetting can alternatively be specified via an analog interface (X1) or via the field bus interface (X2, X3)

• The actual value signals are provided via an analog interface (X1) and can additionally be read out via the field bus (X2, X3)

• The controller parameters are set via the field bus

The integrated digital electronics enables the following error detection:

• Undervoltage

• Cable break position transducer (7)

• Communication error

• Watchdog

• Cable break command value input (only with current interface)

The following additional functions are available:

• Ramp generator

• Internal command value profile

• Enable function, digital

• Overlap compensation

• Zero point correction

WIN-PED PC program (version 6 or higher): To implement the project planning task and to parameterize the IFB-P valves, the user may use the WIN-PED commissioning software.

• Parameterization

• Diagnosis

• Comfortable data management on a PC

System requirements

• IBM PC or compatible system

• Windows 2000 or Windows XP

• RAM (recommendation: 256 MB)

• 150 MB of available hard disk capacity

Notice The "WIN-PED" PC program is not included in the scope of delivery. It is available for free download! Important notice: The PG fitting (13) must not be opened. Mechanical adjustment of the adjustment nut located below is prohibited and damages the valve! Notice! Due to the design principle, internal leakage is inherent to the valves, which may increase over the life cycle. The tank line must not be allowed to run empty. With corresponding installation conditions, a preload valve must be installed.