BOSCH REXROTH
VT-MSPA2-200-1X/V0/0
R901061664
Valve Amplifiers
Multifunct. valve ampl, modul 1X
BOSCH REXROTH
MATERIAL: R901061664
SUMMARY: Multifunct. valve ampl, modul 1X
Quantity in stock: 0
Formula to calculate the ramp times:
; t in ms, U in Volt at the measuring socket
Characteristic curve generator (4)
Using the adjustable characteristic curve generator, the step level for positive and negative signals can be adjusted separately to the hydraulic requirements. The actual development of the characteristic curve through the zero point is not stepped but linear.
Amplitude limiter (5)
The command value is limited to approx. ±110 % of the nominal range.
Current controller (6)
Der current is regulated based on the command value.
Power output stage (7)
The power output stage creates the clocked solenoid current for the proportional valve. The rated solenoid current is 1000 mA per output. The output stage outputs are short-circuit-proof. The output stages are de-energized in case of an internal fault signal or if the enable is missing.
Clock generator (8)
The clock generator generates the clock frequency of the output stages.
f = 150 Hz … 400 Hz, adjustable using poti “f” (pre-set to 240 Hz)
Fault recognition (10)
The solenoid conductor is monitored for cable break as well as over-current of the output stage.
Command value inversion (11)
The command value created internally from the input signal and the zero point offset signal can be inverted by an external signal.
Monitoring and limitation of the solenoid current (12)
The monitoring and limitation of the solenoid current is performed by the VT-MUXA2-2 module.
General
The amplifier modules are snapped onto top hat rails according to EN 60715. The electrical connection is established via screw terminals. The modules are operated with 24 V direct voltage.
Power supply unit [1]
The amplifier modules have a power supply unit with making current limiter. This unit supplies all internally required positive and negative supply voltages.
Command value presetting
The internal command value signal is calculated from the external command value signal available at the differential input [2].
A positive command value results in a current increase in solenoid “b” and thus a flow in the valve from P → A and from B → T.
A negative command value results in a current increase in solenoid “a” and thus a flow in the valve from P → B and from A → T.
Enable function [10]
Using the enable function, the power output stages are enabled and the internal command value signal is forwarded to the ramp generator. The enable signal is indicated by an LED on the front plate. If enable is connected, the internal command value is changed (with any kind of command value presetting) by the set ramp time. Thus, a controlled valve does not open abruptly.
Ramp generator [3]
The ramp generator limits the incline of the control output. The downstream step functions do not extend or shorten the ramp time.
Table for setting and measurement of the ramp time:
|
Value at measuring socket |
U/V |
5 |
3 |
2 |
1 |
0.5 |
0.3 |
0.2 |
0.1 |
0.05 |
0.03 |
0.02 |
|
Current ramp time (±20 %) |
t/ms |
20 |
33 |
50 |
100 |
200 |
333 |
500 |
1000 |
2000 |
3333 |
5000 |
|
01 |
Valve amplifier for proportional valves without electrical position feedback, Analog, Modular design |
VT-MSPA2 |
|
02 |
For valves: |
200 |
|
03 |
Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) |
1X |
|
04 |
Version: standard |
V0 |
|
05 |
Option: standard |
0 |
|
06 |
Further details in the plain text |
* |
|
01 |
02 |
03 |
04 |
05 |
06 |
||||
|
VT-MSPA2 |
‒ |
200 |
‒ |
1X |
/ |
V0 |
/ |
0 |
* |
General
|
Component series |
1X | |
|
Type of electronics |
Analog | |
|
Design |
Modul |
Voltage supply
|
Operating voltage |
nominal |
U |
V |
24 |
|
Lower limit value |
UB(t)min |
V |
18 | |
|
Upper limit value |
UB(t)max |
V |
35 | |
|
Power consumption |
max. |
Smax |
VA |
24 |
|
Current consumption |
max. |
Imax |
A |
1 |
|
Fuse |
Thermal overload protection (with restart if the value falls below the temperature threshold) | |||
Analog inputs
|
Command value |
Voltage (differential input) |
U |
V |
0 ... ±10 | |
|
Voltage (differential input) |
Input resistance |
R |
kΩ |
≥ 50 | |
Digital inputs
|
Enable 1) |
On (active) |
U |
V |
8.5 ... UB |
|
Enable |
Off (inactive) |
U |
V |
0 ... 6.5 |
|
Inverter 1) |
On (active) |
U |
V |
8.5 ... UB |
|
Inverter |
Off (inactive) |
U |
V |
0 ... 6.5 |
| 1) | RE > 100 kΩ |
Solenoid outputs
|
Solenoid current |
max. |
Imax |
A |
1 |
|
Clock frequency 1) |
Setting range |
f |
Hz |
150 ... 400 |
|
Solenoid output |
other properties |
Short-circuit-proof, clocked | ||
|
Cable length |
for 1.5 mm2 |
L |
m |
50 |
| 1) | Pre-set to 240 Hz |
Adjustment options
|
Solenoid current |
I |
A |
0 ... 1,0 |
|
Ramp time up/down |
t |
s |
0.02 … 5 |
|
Step-change height |
% |
0 ... 50 |
Measuring sockets
|
Command value |
"w" |
U |
V |
0 ... ±10 | |
|
after ramp |
"wR" |
U |
V |
0 ... ±10 | |
|
Actual current value |
"I" |
U |
V |
0 ... ±1.0 (mV ≙ mA) | |
|
Ramp time |
“down" |
t |
s |
0.01 ... 5 | |
|
“up" |
t |
s |
0.02 ... 5 | ||
|
additional notices |
See Function | ||||
Displays
|
LED display |
Green |
Ready for operation | |
|
yellow |
Enable |
Supplementary information
|
Connection cross-section |
2.5 mm2 | ||
|
Anschlussart |
12 screw terminals | ||
|
Mounting type |
Top hat rail TH 35-7.5 according to EN 60715 | ||
|
Type of protection according to EN 60529 |
IP 20 | ||
|
Ambient temperature range |
ϑ |
°C |
0 … 50 |
|
Storage temperature range |
ϑ |
°C |
-25 … 70 |
|
Weight |
m |
kg |
0.14 |
For applications outside these parameters, please consult us!
Notice:
For information on the environment simulation testing for the areas EMC (electromagnetic compatibility), climate and mechanical load, see data sheet 30228-U.
Output characteristic curve
Setting range of the step level of the output current: 0 … 500 mA
Default setting ex factory: 150 mA
Operating mode selector switch
|
Without function |
Measuring sockets
|
t < |
Ramp time "Ramp up" |
|
t > |
Ramp time "Ramp down" |
|
I |
Actual current value (mV ≙ mA) |
|
w |
Command value |
|
wR |
Command value after ramp |
|
⊥ |
Reference potential |
Potentiometer
|
Sw+ |
Step level for positive direction |
|
Sw- |
Step level for negative direction |
|
t < |
Ramp time "Ramp up" |
|
t > |
Ramp time "Ramp down" |
|
f |
Clock frequency |
LED displays
|
|
Ready for operation (green) |
|
|
Enable (yellow) |
|
Power supply unit |
|
|
Differential amplifier |
|
|
Ramp generator |
|
|
Characteristic curve generator |
|
|
Amplitude limiter |
|
|
Current controller |
|
|
Power output stage |
|
|
Clock generator |
|
|
Enable |
|
|
Fault recognition |
|
|
Inverter |
|
|
VT-MUXA2-2 monitoring module (not included in the scope of delivery) |
|
|
Two ferrite sleeves (included in the scope of delivery of the monitoring module only) |
|
|
Ramp time "Ramp down" |
|
|
Ramp time "Ramp up" |
|
|
Step-change height |
|
|
Command value |
|
|
Command value after ramp |
|
|
|
Ready for operation (green) |
|
|
Enable (yellow) |
Dimensions in mm
Dimensions in mm
Explosion hazard caused by faulty assembly!
To comply with the safety requirements for the operation of one of the mentioned valves in potentially explosive areas, it must be ensured that the solenoid current does not exceed 1 A. For monitoring and limitation of the valve flow, we recommend using the VT-MUXA2-2 Rexroth monitoring module. In this connection, observe data sheet 30290.
The VT-MSPA2-200 amplifier module and the VT-MUXA2-2 monitoring module may only be installed outside the potentially explosive area.
The VT-MSPA2-200 amplifier module and the VT-MUXA2-2 monitoring module are not subject to directive 94/9/EC (ATEX Directive).
Additional notices:
The amplifier module may only be wired when de-energized.
Do not install signal lines close to power cables and lines.
Do not use free-wheeling diodes in the solenoid conductors.
The distances to aerial lines, radios, and radar systems have to be at least 1 m.
Always shield command value lines; connect shielding to protective earth (PE) on the module side.
Also shield the solenoid conductors. For solenoid conductors up to 50 m in length, use line type LiYCY 1.5 mm2. For greater lengths, please contact us.
For application in connection with the VT-MUXA2-2 monitoring module, please observe the wiring specified in the block diagram of data sheet 30290.
For switching command values, relays with gold-plated contacts have to be used (low voltages, low currents).
Only carry out measurements at the module using instruments with Ri > 100 kΩ.
For setting the potentiometers, use a screwdriver with a blade width of 4 mm.
With a strongly fluctuating operating voltage, it may in individual cases be necessary to use an external smoothing capacitor with a capacity of at least 2200 µF.
Recommendation: VT 11110 capacitor module (see data sheet 30750); sufficient for up to 3 amplifier modules
In connection with the VT-MUXA2-2 monitoring module, the operating voltage has to be supplied via a capacitor module.
The solenoid current connections to the VT-MUXA2-2 monitoring module have to be led through ferrite sleeves. The ferrite sleeves are included in the scope of delivery of the VT-MUXA2-2 monitoring module.
In the condition as supplied, the clock frequency is set to 240 Hz. Rotating the potentiometer “f” changes the valve hysteresis and may lead to disturbing noise developments.
Setting information
Preconditions: The system-specific circuitry must have been completed.
Ramp times
Set ramp time according to formula or table (see functional description “Ramp generator”) and check it at measuring sockets “t >” and “t <”.
Step level
Apply the enable signal
With an external command value presetting of +0.3 V, set the measurement signal at "wR" to +0.3 V
Use potentiometer “Sw+” to set the required positive step level
With an external command value presetting of –0.3 V, set the measurement signal at “wR” to –0.3 V
Use potentiometer “Sw-” to set the required negative step level
Notice:
With external command value presetting, it must be at least +0.3 V / –0.3 V
at measuring socket “wR”.
Clock frequency
Condition as supplied: f = 240 Hz
The new setting of the frequency can be carried out with a digital multimeter that is able to measure frequencies. Measure at connection terminals 7 or 9 against 2 (ground).