Industrial Hydraulics

Bosch Rexroth AG Industrial Hydraulics 91
Electronic components
Amplifiers for proportional valves with electrical position feedback
< Analogue amplifiers of Euro-card format for installation in 19" racks
< Voltage stabilization with raised measuring zero point, filter capacitor on the amplifier card
< Differential input
< Internal command value adjustment by means of 4 trimming potentiometers, call-up via
relays, with LED indicator lamp (on some versions)
< Ramp generator that can be switched off
< 5 ramp times, adjustable by means of trimming potentiometers (on some versions)
< Step function for quick passing the overlap on directional valves
< Oscillator/demodulator for inductive position feedback
< PID-controller for controlling the control spool po si ti on
< Cable break detection with LED indicator lamp for position transducer; in the event of a
cable break, the output amplifier is de-energized
< Clocked output amplifier with current regulation
Technical data
Operating voltage UB VDC 24; + 40 %; – 5 %
– Upper limit value UB (t) max V 35
– Lower limit value UB (t) min V 22
Regulated voltage U V M0 ± 9 (with raised zero point)
Oscillator frequency f kHz ca. 2.5
Output amplifier Current-regulated, clocked
Type of connection 32- or 48-pin male connector, DIN 41 612
Card dimensions mm Euro-card 100 x 160, DIN 41 494
Ambient temperature range ϑ °C 0 to + 50
Storage temperature range ϑ °C – 20 to + 70
Amplifier type Suitable for valve type Detailed information:
VT 5004 2FRE, sizes 10 and 16 RE 29945
VT-VRPD-1 2FRE 6 RE 30125
VT-VRPA2-1 4WRE 6 (series 2X) RE 30119
VT-VRPA2-2 4WRE 10 (series 2X) RE 30119
VT-VRPD-2 4WRE (series 2X) RE 30125