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Description
- Component series 1X
- Analog, Euro-card format
- For controlling valves with integrated or external electronics
Features
- Differential inputs for voltage and current
- Four callable command value inputs, input for ramp time
- Digital inputs for enable, ramp, inverting and command value call-up
- Control outputs for voltage and current
- Ramp time selection with quadrant recognition
- Reverse polarity protection for the operating voltage
- Switchable measuring socket
- "Ready for operation" output
- Characteristic curve correction through separately adjustable step-change heights and maximum values
Product description
General information
The command value card is set up as printed circuit board in europe format and suitable for installation in a rack. An internal power supply unit [1] supplies all internally required positive and negative supply voltages. If the power supply unit is in operation and no error is detected, the green LED on the front plate is lit and the "ready for operation" signal is set.
Current input [3]
There is no switch-over between current and voltage input. Both inputs are permanently available (see terminal assignment). The input signals are internally normalized and added up. The zero point and the value range of the current input can be switched using jumper J5.
Command value call-ups [4]
Four command value signals "w1" to "w4" can be called up. The external command value voltages (command value 1 to 4) are either defined directly by the regulated voltage outputs +10 V and –10 V or by external potentiometers. If these command value inputs are directly connected to the regulated voltages, the command values are set at the potentiometers "w1" to "w4". When using external potentiometers, the internal potentiometers will function as attenuators or limiters.
Only one call-up can be operated at a time. If several call-ups are operated simultaneously, call-up "1" has the lowest priority and call-up "4" has the highest priority.
The respective active call-up is indicated by a yellow LED on the front plate.
Command value inversion [7]
The command value created internally from the input signals, the command value call-ups and the zero point offset signal can be inverted by an external signal or jumper J1. If an external inverting signal is connected, this is indicated by an LED ("–1") on the front plate.
Enable function [8]
The enable function switches the input signal of the ramp generator on or off. If enable is switched on or off, the control output changes with the set ramp time irrespective of the command value. Thus, a controlled valve does not open or close abruptly. If an error signal occurs, the ramp generator input signal is also set to 0 %. The enable signal is indicated by an LED on the front plate.
Ramp generator [9]
The ramp generator limits the incline of the control output. The downstream step functions and amplitude attenuators do not extend or shorten the ramp time.
Using jumper J2, the ramp time is set to a minimum (<2 ms) (ramp off).
External ramp time setting:
Using an external potentiometer, the internally set ramp time can be extended. The setting can be verified by means of the measuring socket. In case of a cable break, the internal default setting will be valid automatically.
Information on ramp time settings and measurement:
| Value at measuring socket "v" | 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 |
By reconnecting the jumper J3, the ramp times specified above can be increased tenfold.
Ramp status signal [11]
The "ramp ready" status signal indicates that the control output has reached the desired end value. By means of this signal (24 V output), superior sequence controls can be more easily synchronized with the valve function or the controlled hydraulic function.
Characteristic curve generator [12]
Using the adjustable characteristic curve generator, step level and maximum values for positive and negative signals can be set separately, adjusted to the hydraulic requirements. The actual development of the characteristic curve through the zero point is not stepped but linear.
Amplitude limiter [13]
The control outputs (current output and voltage output) are limited to approx. ±110 % of the nominal range.
Fault recognition [14]
The internal operating voltages and the voltage outputs are monitored and, if the jumper J7 (1-2) is connected, the current output is checked for cable break. If there is no error, the green "ready for operation" LED is lit and the "ready for operation" output is switched to 24 V (operating voltage).
Measuring points [15]
A measuring socket on the front plate is provided for verifying the settings of the command value call-up, the ramp times and further internal signals. The measuring points are selected via the measuring point selector switch which is also located on the front plate. The signal of the measuring socket is also connected to the male multipoint connector (b26).
[ ] = Assignment to the block diagram
Type code
| 01 | Analog command value card | VT-SWKA-1 |
| 02 | Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) | 1X |
| 03 | Version: standard | V0 |
| 04 | Option: standard | 0 |
| 05 | Further details in the plain text | * |
| 01 | 02 | 03 | 04 | 05 | ||||
| VT-SWKA-1 | ‒ | 1X | / | V0 | / | 0 | / | * |
Technical data
General
| Component series | 1X | |
| Type of electronics | Analog | |
| Design | Euro-card |
Voltage supply
| Operating voltage | Nominal | UB | V | 24 |
| Lower limit value | UB(t)min | V | 18 | |
| Upper limit value | UB(t)max | V | 35 | |
| Power consumption | max. | PS | VA | 7 |
| Current consumption | max. | I | A | 0.3 |
| Fuse | IS | Thermal overload protection; self-activating after tripping | ||
Analog inputs
| Command value | Voltage | Differential input | Ue | V | 0 … ±10 |
| Differential input resistance | Re | kΩ | > 50 | ||
| Potentiometer input 1-4 1) | Ue | V | 0 … ±10 | ||
| Input resistance | Re | kΩ | > 100 | ||
| Current 2) | Ie | mA | 4 … 20 | ||
| Current | Input resistance | RB | Ω | 100 | |
| Ramp time | External 3) | Ue | V | 0 … 10 | |
| Input resistance | Re | kΩ | 10 | ||
| 1) | Reference potential is M0 |
| 2) | Switchable zero point |
| 3) | Internally raised to +15 V, reference is M0 |
Digital inputs
| Command value call-ups | On (active) 1) | U | V | 8.5 ... UB |
| Off (inactive) | U | V | 0 ... 6.5 | |
| Enable | On (active) 1) | U | V | 8.5 ... UB |
| Off (inactive) | U | V | 0 ... 6.5 | |
| Inverter | On (active) 1) | U | V | 8.5 ... UB |
| Off (inactive) | U | V | 0 ... 6.5 | |
| Ramp call-ups | On (active) 1) | U | V | 8.5 ... UB |
| Off (inactive) | U | V | 0 ... 6.5 | |
| 4-quadrant operation | On (active) 1) | U | V | 8.5 ... UB |
| Off (inactive) | U | V | 0 ... 6.5 |
| 1) | Re > 100 kΩ |
Analog outputs
| Voltage | Number and designation | 1 (control output) | ||
| Voltage 1) | U | V | 0 … ±10 | |
| Current | Number and designation | 1 (control output) | ||
| Current 2) | U | mA | 4 … 20 A | |
| Measurement signal | U | V | 0 ... ±10 ±2% (Imax = 2 mA) | |
| 1) | Imax = 2 mA |
| 2) | RBmax = 500 Ω, switchable zero point |
Digital outputs
| Ready for operation | On (active) 1) | U | V | 16 ... UB |
| Off (inactive) | U | V | 0 ... 1 | |
| Ramp | timeout 1) | U | V | 16 ... UB |
| no timeout | U | V | 0 ... 1 |
| 1) | Imax = 50 mA, Ri = 10 kΩ |
Adjustment options
| Setting range | Zero point calibration | % | ± 30 | |
| Setting range | Command value attenuator potentiometer input | % | 0 ... 110 | |
| Setting range 1) | Amplitude attenuator for command value | % | 0 ... 110 | |
| Setting range 1 | Ramp time up/down | t | s | 0.02 … 5 |
| Setting range 2 | Ramp time up/down | t | s | 0.2 … 50 |
| Setting range 2) | Step-change height | % | 0 ... 50 |
| 1) | Applies to a step level setting of 0% |
| 2) | Step level reached at Ucommand = 2 %, separately adjustable for positive and negative signals. |
Measuring sockets
| Switchable | "v" | U | V | 0 ... ±10 ±2% (Imax = 2 mA) |
Displays
| LED display | Green 1 | Ready for operation | |
| Yellow 1 | Enable | ||
| Yellow 2 | Inverter | ||
| Yellow 4 | 4-quadrant operation |
Other information
| Reference voltage | Potentiometer supply | U | V | ±10 ±2% (Imax = 25 mA, short-circuit-proof) |
| Anschlussart | 48-pole male multipoint connector, DIN 41612, design F | |||
| Ambient temperature range | ϑ | °C | 0 … 50 | |
| Storage temperature range | ϑ | °C | -25 … 85 | |
| Weight | m | kg | 0.15 | |
(For applications outside these values, please consult us!)
Operating and display elements
Jumper
| Jumper | Function | Plug-in position | Factory setting | |
| 1 - 2 | 2 - 3 | |||
| J1 Inverter | inverting |  | ||
| not inverting |  | ● | ||
| J2 Ramp on/off | off |  | ||
| on |  | ● | ||
| J3 Ramp time | 10 x |  | ||
| 1 x |  | ● | ||
| J4 Step function | off |  | ● | |
| on |  | |||
| J5 Current input | 0 % ≙ 4 mA |  | ||
| 0 % ≙ 12 mA |  | ● | ||
| J6 Current output | 0 % ≙ 4 mA |  | ||
| 0 % ≙ 12 mA |  | ● | ||
| J7 Cable break monitoring | on |  | ||
| off |  | ● | ||
| Ready for operation (green) | |
| Enable (yellow) | |
| -1 | External inverter |
| 4Q | 4-quadrant operation |
| w1...w4 | Command value call-ups |
| t1...t4 | Ramp time call-ups |
Potentiometer
| Zw | Zero point setting |
| w1 | Command value 1 |
| w2 | Command value 2 |
| w3 | Command value 3 |
| w4 | Command value 4 |
| t1 | Ramp time "t1" |
| t2 | Ramp time "t2" |
| t3 | Ramp time "t3" |
| t4 | Ramp time "t4" |
| t5 | Ramp time "t5" |
| G+ | Amplitude attenuator for positive command values |
| G- | Amplitude attenuator for negative command values |
| S+ | Step level for positive direction |
| S- | Step level for negative direction |
| v | Switchable measuring points |
| ⊥ | Reference potential |
Measuring socket "v"
| Signal designation | Measuring point selector switch | Measurement signal |
| Internal command value | 0 | ±10 V ≙ ±100 % |
| Command value 1 | 1 | ±10 V ≙ ±100 % |
| Command value 2 | 2 | ±10 V ≙ ±100 % |
| Command value 3 | 3 | ±10 V ≙ ±100 % |
| Command value 4 | 4 | ±10 V ≙ ±100 % |
| Zero point command value | 5 | ±3 V ≙ ±30 % |
| Sum of the command values | 6 | ±10 V ≙ ±100 % |
| Ramp output signal | 7 | ±10 V ≙ ±100 % |
| — | 8 | — |
| — | 9 | — |
| Ramp time "t1" | A | 10 mV ... 10 V 1) |
| Ramp time "t2" | B | 10 mV ... 10 V 1) |
| Ramp time "t3" | C | 10 mV ... 10 V 1) |
| Ramp time "t4" | D | 10 mV ... 10 V 1) |
| Ramp time "t5" | E | 10 mV ... 10 V 1) |
| Current ramp time | F | 10 mV ... 10 V 1) |
| 1) The assignments between voltage and ramp time specified in the Function section apply. | ||
Symbols/Circuit diagrams
| 1 | Power supply unit |
| 2 | Differential amplifier |
| 3 | Current input |
| 4 | Command value selection logics |
| 5 | Zero point setting |
| 6 | Command value summation |
| 7 | Command value inversion |
| 8 | Enable |
| 9 | Ramp generator |
| 10 | Ramp time selection logics |
| 11 | Ramp status function |
| 12 | Characteristic curve generator |
| 13 | Amplitude limiter |
| 14 | Fault recognition |
| 15 | Measuring point switch-over |
Dimensions
4/2 directional seat valve (“D”)
Dimensions in mm
Dimensions in mm
Project planning information
- The command value card may only be unplugged and plugged when de-energized.
- Do not lay lines close to power cables.
- The distance to aerial lines, radios, and radar systems has to be at least 1 m.
- For switching command values, relays with gold-plated contacts have to be used (low voltages, low currents).
- Always shield command value lines, connect shielding to protective earth (PE) on the card side.
- If the differential input is used, both inputs must always be connected or disconnected at the same time.
For further information see "Product description and commissioning instructions VT-SWKA-1" (document 30255-B).
Downloads
 | Analog Command Value Card Typ VT-SWKA-1, commissioning Manual | RE30255-B | 2000-05-01 | English | PDF | 519k Product Groups: Analog, Euro-card format |
| Analoge Sollwertkarte Typ VT-SWKA-1 Inbetriebnahmeanleitung Manual | RD30255-B | 2000-05-01 | German | PDF | 519k Product Groups: Analog, Euro-card format |
| Carte de signaux de consigne et de rampes Data Sheet | RF30255 | 2013-04-30 | French | PDF | 189k Product Groups: Analog, Euro-card format VT-SWKA-1-1X |
| Tarjeta de valor nominal y rampas Data Sheet | RS30255 | 2013-04-30 | Spanish | PDF | 235k Product Groups: Analog, Euro-card format VT-SWKA-1-1X |
| Sollwert- und Rampenkarte Data Sheet | RD30255 | 2013-04-30 | German | PDF | 188k Product Groups: Analog, Euro-card format VT-SWKA-1-1X |
| Command value and ramp card Data Sheet | RE30255 | 2013-04-30 | English | PDF | 188k Product Groups: Analog, Euro-card format VT-SWKA-1-1X |
| 控制值和斜坡板卡 Data Sheet | RC30255 | 2013-04-30 | Chinese | PDF | 566k Product Groups: Analog, Euro-card format VT-SWKA-1 |
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