Product data sheet
Digital valve amplifier
for valve types
4WRE 6 ..., component series 2X
4WRE 10 ..., component series 2X
Type VT-VRPD-2
RE 30126 Edition: 2013-10
Replaces: 09.07
▶ Component series 2X
▶ Suitable for controlling proportional valves with
electrical position feedback of types:
4WRE 6, component series 2X
4WRE 10, component series 2X
H7356
Features
Contents
▶ The user-specific data can be exactly reproduced and
is protected against unintended or unauthorized adjustment
▶ Valve selection using the BODAC operating software
▶ Command value input, optionally as voltage or
current interface
▶ Voltage input as differential input
▶ Command value input with variable input adjustment
▶ Ramp generator
▶ Digital inputs for calling up pre-set command
value parameters
▶ Enable input and fault output
▶ Freely configurable measuring socket X2
(X1 fixed to actual valve value)
▶ Configuration and parameterization via serial interface
with BODAC PC software (CD:SYS-HACD-BODAC-01)
connection cable for BODAC
▶ Up to 32 valve amplifiers can be interconnected for
parameterization and diagnosis via the local bus
Features
Ordering code
Functional description
Block diagram
Technical data
Pin assignment of the male multipoint connector
Pin assignment of the D-Sub socket
Dimensions
Project planning / maintenance instructions /
additional information
1
2
3
4
5
7
8
8
9
RE 30126, edition: 2013-10, Bosch Rexroth AG
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VT-VRPD-2 | Digital valve amplifier
Ordering code
01
VT-VRPD
02
‒
2
03
‒
2X
04
/
V0
05
/
0
06
‒
0
07
‒
1
VT-VRPD
01
Digital amplifier for proportional valves with electrical position feedback
02
Amplifier for valve types 4WRE 6 …-2X and 4WRE 10 …-2X
03
Component series 20 ... 29 (20 to 29: Unchanged technical data and pin assignment)
2X
04
Basic device
V0
05
Without display
0
06
Basic device
0
07
With valve output stage (only suitable for valves with two solenoids)
1
Required accessories:
▶ PC program BODAC: CD ordering information:
SYS-HACD-BODAC-01 (R900777335) or free download
on the Internet at www.boschrexroth.com/hacd
▶ Interface cable: Cable set VT-HACD-1X/03.0/HACD-PC
(R900776897) or standard 1:1 cable
Bosch Rexroth AG, RE 30126, edition: 2013-10
2
Suitable card holders:
▶ Open card holder VT 3002-1-2X/64G (see data
sheet 29928), mat. no. R900991843 (only for control
cabinet installation)
▶ Connection adapter VT 10812-2X/64G (see data
sheet 30105), mat. no. R900713826
Digital valve amplifier | VT-VRPD-2
3/10
Functional description
The valve amplifier is set-up as printed circuit board in Europe
format 100 x 160 mm with daughter board, fitted on both sides.
The central unit is a microcontroller controlling the entire
process and realizing the position control. Data for configuration, command values and parameters are stored in
a FLASH in a non-volatile form.
Four binarily coded digital inputs are used to call up
parameter sets (command values) from the memory in
which you can store a maximum of 16 sets. A call-up activates the command value for the control spool position
with the related ramp times.
More control inputs have the following functions:
"Command value valid": Enabling of the parameter set
addressed by the current call-up
(H active)
"Enable":
Activation of the outputs
(acknowledgment of the fault
message with low-high edge)
The valve amplifier comprises a controller for the control
spool position of a proportional valve.
The command value can be preset via digital command
value call-ups [5] and/or via analog inputs [1]. The analog
input AI4 (b14/b16) is to be used for the command value
presetting of ±10 V, the analog input AI6 (b22/b24) for any
command value presetting from 4 to 20 mA.
Command values from 0 to +10 V (12...20 mA) control
solenoid B.
Command values from 0 to –10 V (4...12 mA) control
solenoid A.
The digital command value is added to the analog command
value with the correct sign, according to the set call-up.
The command value inputs can be varied by means of
software in the signal level.
Apart from the internal ramp generation option, you can
also influence the ramp for "up" and "down" from external
signals with correct total and correct sign by means of the
AI2 (b6/b9) and AI5 (b18/b20) analog inputs.
For the 4WRE valves, the software offers a step function
generator [9] for the realization of the overlap jump if an
overlapped control spool is selected. The command value
total is switched to the controller [12]. The actual valve
value (b26) is generated from the valve position measurement system by means of an oscillator/a demodulator
stage and also switched to the controller [12]. The controller output controls the flow-controlled output stages.
is an error, a fault message is output to (d22) by means of
a low signal and displayed visually by the "OK" LED (OK
goes out) on the front plate. It is possible to configure the
enable so that an inactive enable input is not displayed
as error.
Parameterization and diagnosis
Selection of the valve to be controlled and selection and
configuration of the command value input, the ramp generator and the enable input as well as the setting of the
command value call-up parameters are effected via the
serial interface [6] at the front-side D-Sub socket [7]. Via
the local bus, up to 32 valve amplifiers can be connected.
Via BODAC, every valve amplifier is assigned a bus
address. Reconnection of the serial interface cable is not
required. For more information refer to the instructions 30126-01-B.
Digital
DO 1
DO 2
DO 3
DO 4
DO 5
DO 6
DO 7
outputs
(d20)
(d26)
(z22)
(z24)
(z26)
(z28)
(f2)
Solenoid A active
Solenoid B active
Control error ≥ window
Freely configurable
Freely configurable
Freely configurable
Not assigned
Display elements and measuring sockets
The front plate of the command value card is equipped
with measuring sockets for the two analog outputs.
Measuring socket "X1":
Actual valve value (b26)
Measuring socket "X2":
Valve command value (default)
Measuring socket "⊥":
Reference potential (corresponds to port z32)
LEDs display the following states:
LED " " (green):
Enable active
LED "OK" (green):
OK ready for operation
LEDs "I1"..."I4" (yellow): Binarily coded command value
call-ups
LED "I6" (yellow)
Command value valid
LED "I5, I7" (yellow)
Not assigned
[ ] = Assignment to the block diagram on page 4
Enable and error messages
The control is activated by the H level at the enable input. If
no command value call-up is active, the digital call-up 0 is set.
Error logics [14] identify any control deviation, cable break
of the actual value cables and the command value input
for 4 to 20 mA as well as an inactive enable input. If there
RE 30126, edition: 2013-10, Bosch Rexroth AG
Bosch Rexroth AG, RE 30126, edition: 2013-10
17
10 Limitation
11 PID controller
12 Oscillator / demodulator
4 Switching power supply unit
5 Binary command value call-ups
6 Control of the binary call-ups
9 Offset
RS 232
Control
binary call-ups
3 Switching matrix
6
8 Step function generator
16
%
t
14
LC1
10
9
8
7
X2 X1
15
Solenoid A active
Solenoid B active
Control error ≥ window
Freely configurable
Freely configurable
Freely configurable
Not assigned
13
PID
11
⊥
Reference potential (0 V)
X2 Valve command value (default)
17 Serial interface
–10V
+10V
OK
DO 1
DO 2
DO 3
DO 4
DO 5
DO 6
DO 7
value (± 10 V)
AO3 Actual valve
Valve command value
AO1 (± 10 V)
4
1
2
3
16 Local bus
b30
b32
d22
d20
d26
z22
z24
z26
z28
f2
b26
b28
d30
≈ z14
z10
a
b
Solenoid A
2
1
2
Measuring sockets:
U
=
≈ z12
z16
z18
z2
z4
z10
z8
1
Solenoid B
X1 Actual valve value
U
12
=
u
i
i
z6
15 Error logics
PI
PI
u
14 Digital outputs
13 Measuring sockets
Binary 15
Binary 0
Command value internal Ramp "up"
Ramp "down"
S ramp start
S ramp end
4
7 Characteristic curve adjustment
DC
DC
Binary 8
Command value valid
Binary 1
Binary 2
Binary 4
5
3
2 Analog input adjustment
z30
z32
z20
d24
d28
d18
d2
d4
d6
d8
d12
b14
b16 U U
b22 I
b24 U
b6 U
b8
U
b18 U
b20 U
2
1 U/U or I/U transformer
0V
+ UB
System earth
Data +
Data –
Enable DI 9
DI 4
DI 6
DI 1
DI 2
DI 3
External ramp AI5
"down" (0 - 10 V)
External ramp
AI2
"up" (0 - 10 V)
Current input
(4 - 20 mA) AI6
Voltage input
AI4
(±10 V)
1
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VT-VRPD-2 | Digital valve amplifier
Block diagram
Digital valve amplifier | VT-VRPD-2
5/10
Technical data (for applications outside these parameters, please consult us!)
Valve amplifier VT-VRPD-2-2X/V0/0-0-1
Operating voltage
UB 24 VDC
Upper limit value
uB(t)max 30 V
Lower limit value
uB(t)min 21 V
Current consumption
Fuse
Imax 1.5 A; standby current 270 mA
IS 4 A time-lag
Digital inputs
Signal log 0 = 0 to 5 V
Digital outputs
Signal log 0 = 0 to 5 V
log 1 = 16 V to UB
log 1 = UB – 3 V
Imax = 30 mA, short-circuit protected
Analog inputs
Voltage input AI4, AI2 and AI5
Range
Input resistance
U ±10 V
Re 100 kΩ, > 10 MΩ for input AI2
Resolution
5 mV for range ±10 V
2.5 mV for range 0...10 V
Non-linearity
< 10 mV
Current input (only AI6)
Range
Input resistance
Leakage current
Resolution
I 4...20 mA
Re 100 Ω
0.15 % (with 500 Ω between pin b24 and 0 V)
I 5 μA
Analog outputs
Voltage outputs AO1 and AO3
Output voltage
Load
Resolution
Residual ripple
Ramp time
U ±10 V
RLmin 1 kΩ
U 1.25 mV (14 bit)
±15 mV (without noise)
t Max. 300 s
Valve output stage
Solenoid current per solenoid
Reference voltage
Residual ripple
Imax 2.5 A
U ±10 V, 30 mA, short-circuit-proof
< 20 mV
Oscillator frequency
f 5.7 kHz
Scan time for command value preparation
t 2 ms
Serial interface
Type of connection
Local bus, distance to the furthermost device
Card dimensions
RS 232 (front plate), D-Sub socket
64-pole male multipoint connector, DIN 41612, design G
l Max. 280 m line length
Euro-card 100 x 160 mm, DIN 41494
Front plate dimensions
Height
3 HE (128.4 mm)
Width soldering side
1 TE (5.08 mm)
Width component side
7 TE
Admissible operating temperature range
 0 to 50 °C
Storage temperature range
 –20 to +70 °C
Weight
m 0.2 kg
Notice:
Information on the environment simulation testing for the areas EMC (electro-magnetic compatibility), climate and
mechanical load, see data sheet 30126-U (environmental compatibility statement).
RE 30126, edition: 2013-10, Bosch Rexroth AG
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VT-VRPD-2 | Digital valve amplifier
Technical data (for applications outside these parameters, please consult us!)
Valve 4WRE...-2X (not included in the scope of delivery)
Solenoid
Current consumption per solenoid
Imax
2.5 A
Solenoid coil resistance
Cold value at 20 °C
R
2.7 Ω
Max. hot value
R
4.5 Ω
Electrical connection
Plug-in connection according to DIN EN 175301-803
Protection class according to EN 60529
IP 65 with mating connector correctly mounted and locked
Position transducer
Carrier frequency
f
5 kHz
Between ports 1 and 2
R
113 Ω
Between ports 3 and 4
R
101 Ω
Coil resistance (at 20 °C):
Electrical connection
Plug-in connection according to DIN 43650-BFZ-Pg9
Protection class according to EN 60529
IP 65 with mating connector correctly mounted and locked
Bosch Rexroth AG, RE 30126, edition: 2013-10
Digital valve amplifier | VT-VRPD-2
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Pin assignment of the male multipoint connector
Row b
Row d
Pin
2
4
Short
Description
denomination
Binary 1
2
n. c.
DI 2
Binary 2
4
n. c.
n. c.
6
AI 2+
Ramp + (U)+
DI 3
Binary 4
8
DI 4
Binary 8
12
Short
Description
denomination
DI 1
6
10
Pin
DI 5
DI 6
n. c.
8
AI 2–
Ramp + (U)–
n. c.
10
n. c.
n. c.
Command value valid
12
n. c.
n. c.
AI 4+
Command value (U)+
14
DI 7
n. c.
14
16
DI 8
n. c.
16
AI 4–
Command value (U)–
AI 5+
Ramp – (U)+
18
DI 9
Enable
18
20
DO 1
Solenoid A active
20
AI 5–
Ramp – (U)–
AI 6+
Command value (I)+
22
OK
OK output
22
24
Data+
Local bus
24
AI 6–
Command value (I)–
Solenoid B active
26
AO 3
Actual valve value ±10 V
26
DO 2
28
Data–
Local bus
28
AGND
Analog GND
30
AO 1
Valve command value
30
REF–
–10 V
n. c.
32
REF+
+10 V
32
AO 2
Row z
Pin
Row f
Short
Description
denomination
Pin
Short
Description
denomination
2
MA+
Solenoid A+
2
DO 7
n. c.
4
MA–
Solenoid A–
4
n. c.
n. c.
6
MB+
Solenoid B+
6
n. c.
n. c.
Solenoid B–
8
MB–
8
n. c.
n. c.
10
Shield
Shield
10
n. c.
n. c.
12
L 1O–
Position transducer of valve feed –, pin 2
12
n. c.
n. c.
14
L 1I–
Position transducer of valve actual value –, pin 4
14
n. c.
n. c.
16
L 1I+
Position transducer of valve actual value +, pin 3
16
n. c.
n. c.
18
L 1O+
Position transducer of valve feed +, pin 1
18
n. c.
n. c.
20
System earth
System earth
20
n. c.
n. c.
22
DO 3
Control error ≥ window
22
n. c.
n. c.
24
DO 4
Freely configurable
24
n. c.
n. c.
26
DO 5
Freely configurable
26
n. c.
n. c.
28
DO 6
Freely configurable
28
n. c.
n. c.
30
UB
Supply voltage
30
n. c.
n. c.
32
LO
Weight
32
n. c.
n. c.
RE 30126, edition: 2013-10, Bosch Rexroth AG
8/10
VT-VRPD-2 | Digital valve amplifier
Pin assignment of the D-Sub socket
5
9
GND
Transmission data (RS 232)
Reception data (RS 232)
6
1
RS 232
Dimensions (dimensions in mm)
Rexroth
O1
I2
O2
I3
O3
I4
O4
I5
O5
I6
O6
I7
O7
122
I1
100
89
3HE (128,4)
OK
RS232
X1 X2
VRPD-2
8TE (40,3)
Bosch Rexroth AG, RE 30126, edition: 2013-10
165
195,5
2
Digital valve amplifier | VT-VRPD-2
9/10
Project planning / maintenance instructions / additional information
Product documentation for valve amplifier VT-VRPD-2-2X/V0/0-0-1
30126
Technical data sheet (this document)
30126-B
Installation and operating instructions
30126-01-B
Commissioning and operating instructions
30126-U
Environmental compatibility statement
30126-Z
Additional information for replacing the VT-VRPD-2-1X by VT-VRPD-2-2X
▶
▶
▶
▶
▶
The valve amplifier may only be unplugged and plugged when de-energized.
No connectors with free-wheeling diodes or LED indicators must be used for solenoid connection.
Only carry out measurements at the card using instruments Ri > 100 kΩ.
For switching command values, relays with gold-plated contacts have to be used (low voltages, low currents).
Always shield command value lines and lead them separately; connect shielding to port z10 on the card-side, other
side open (risk of ground loops).
▶ For solenoid conductors up to 50 m in length, use the line type LiYCY 1.5 mm2. With greater lengths, please contact us.
Recommendation:
Also shield the solenoid conductors.
▶ Use highly flexible CU conductors (at least 2.5 mm2) in order to connect the system earth.
The system earth is a main part of the EMC protection of the valve amplifier. It is intended to eliminate interferences
which are transported via the data and supply lines. However, this is only possible if the system earth itself does not
introduce interferences into the command value card.
▶ The distance to aerial lines, radios, and radar systems has to be 1 m at least.
▶ Do not lay solenoid conductors and signal lines near power lines.
▶ The charging power of the smoothing capacitor on the card requires the pre-fuses to be of a slow-blowing nature.
▶ Notice: If a differential input is used, both inputs must always be connected or disconnected at the same time.
RE 30126, edition: 2013-10, Bosch Rexroth AG
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VT-VRPD-2 | Digital valve amplifier
Notes
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
Bosch Rexroth AG, RE 30126, edition: 2013-10
© This document, as well as the data, specifications and other information set
forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
reproduced or given to third parties without its consent.
The data specified above only serve to describe the product. No statements
concerning a certain condition or suitability for a certain application can be
derived from our information. The information given does not release the user
from the obligation of own judgment and verification.
It must be remembered that our products are subject to a natural process of
wear and aging.
Digital valve amplifier | VT-VRPD-2
11/10
Notes
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other information set
forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
reproduced or given to third parties without its consent.
The data specified above only serve to describe the product. No statements
concerning a certain condition or suitability for a certain application can be
derived from our information. The information given does not release the user
from the obligation of own judgment and verification.
It must be remembered that our products are subject to a natural process of
wear and aging.
RE 30126, edition: 2013-10, Bosch Rexroth AG
12/10
VT-VRPD-2 | Digital valve amplifier
Notes
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
Bosch Rexroth AG, RE 30126, edition: 2013-10
© This document, as well as the data, specifications and other information set
forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
reproduced or given to third parties without its consent.
The data specified above only serve to describe the product. No statements
concerning a certain condition or suitability for a certain application can be
derived from our information. The information given does not release the user
from the obligation of own judgment and verification.
It must be remembered that our products are subject to a natural process of
wear and aging.
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