User Manual

Bosch Rexroth AG
RE 95 320/06.06
DRC Travel Drive Control
11/20
Variants DRCD and DRCE
Hydraulic system
The electronic travel drive control is designed to actuate a
variable pump in a closed hydraulic circuit with electric, direct-
controlled DE / EV control (DRCD) or electric, proportional EP
control (DRCE) and a variable motor with electric, proportional
EP control.
The following Rexroth hydraulic pumps are supported:
DRCD:
• A4VG.DE, A4VG.EV (see catalog RE 92003)
• A10VG.DE (see catalog RE 92750)
DRCE:
• A4VG.EP (see catalog RE 92003)
• A10VG.EP (see catalog RE 92750)
In combination with the variable pump, multiple fi xed or up to
two variable motors can be used.
The following Rexroth fi xed displacement motors are sup-
ported:
• A2FM (see catalog RE 91001)
• A2FE (see catalog RE 91008)
• A4FM (see catalog RE 91120)
• A10FM (see catalog RE 91172)
The following Rexroth variable motor is supported:
• A6VM.EP (see catalog RE 91 604)
The electronic travel drive control can be used with a diesel
engine with or without a CAN bus interface.
Interfaces
Comprehensive information on interfaces and technical data
for the RC4-4 controller can be found in the catalog entitled
"Controller RC" (RE 95 200). The most important interfaces
for the DRCD and DRCE electronic travel drive control are:
• Analog input signals (from potentiometers or angle sensors)
Analog voltages in the range from 0 - 5 V are received as
input signals by the DRCD and DRCE.
• Digital input signals (from switches)
DRCD and DRCE receive digital input signals from the
travel direction switch, from the switch for determining the
travel mode, from the seat switch and, if applicable, from the
switch contacts on the acceleration and inch pedals.
The "teach function" input can be used to activate calibration
of the potentiometers and the plotting of the teach curve
without BODEM.
• Frequency inputs (from the speed sensor)
The DRCD and DRCE can receive frequency signals from
speed sensors for the purpose of monitoring the speed of
the diesel engine and of the hydraulic motor.
• Proportional outputs (PWM currents)
The DRCD and DRCE supply regulated pulse-width
modulated currents for direct control of proportional
solenoids. The dither frequency optimizes these outputs for
accuracy and minimum hysteresis for the electrical control of
pumps and hydraulic motors.
• Switched outputs
The DRCD and DRCE supply digital output signals for
direct control of on/off solenoids. These outputs control
the directional valve of the pump for travel direction pre-
selection.
The DRCD and DRCE supply a digital output signal for
connecting an error lamp.
• CAN-bus interface
The CAN-bus interface CAN1 is available for transmitting the
speed and the temperature of the diesel engine. In addition,
the position of the acceleration pedal can be determined by
the diesel engine. Diagnostic messages can be transmitted
on CAN2 by the RC controller.
• Diagnostics interface
To communicate with the parameterization and diagnostic
tools, the tool in question must be connected to the
controller via a special diagnostics socket.
This diagnostics socket needs to be part of the cable
harness. This enables the connection of a laptop with the
BODEM PC software (RE 95 085).
BODEM can be used for communicating with a variety of
controllers available in the Rexroth line.