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Description
- Component series 1X
- Analog, Modular design
- Suitable for controlling valves with integrated electronics
Features
- Possibility of realising simple hydraulic functions via digital controlling
- Adjustment elements:
1 potentiometer for zero point adjustment (command value offset)
1 potentiometer for command value attenuation (for differential input)
4 potentiometers for command value preselection
5 potentiometers for ramp time adjustment - LED lamps:
Command value call-up (4 x)
Active ramp time (4 x)
Quadrant recognition
Polarity reversal
Power - Measuring sockets for command value and ramp time
- Differential input
- 4 call-up possibilities each for command value and ramp time
- Ramp generator with 5 ramp times; 4-quadrant recognition
- Actuating signal output
- Power supply unit without raised zero point
- Without power part
Product description
General information
The command value module is to be snapped onto top hat rails according to EN 60715. The electrical connection is made using screwtype terminals. The module is operated with 24 V DC voltage. A power supply unit [1] proveides the internally required positive and negative supply voltages. As soon as the power supply unit is in operation, the green LED (“power”) lights up.
Internal command value
The internal command value is generated from the external command value signal applied to differential input [2], a called-up signal and an offset signal (zero point potentiometer “Z” [3]).
The external command value signal can be changed by the potentiometer “G” (amplitude attenuator [4]) from 0 % to approx. 110 %.
Command value call-ups
Call-up signals w1 to w4 [5] can also be adjusted between 0 % and 110 %. Call-up signals w1 and w2 have positive, call-up signals w3 and w4 a negative polarity. This allows the realisation
of two forward and two reverse movements of the hydraulic drive without requiring any additional circuitry. For applications that require more than two signals of the same polarity, a command value inversion [6] is provided. If this is activated, for
example, together with call-up 3, call-up signal w3 also provides a positive control variable.
Only one call-up is possible at a time. If several call-ups are activated simultaneously, the following vaild: Call-up “1” has the lowest priority, call-up “4” has the highest priority [7].
Quadrant recognition
When quadrant recognition [8] is activated, the electronics automatically recognises the polarity [9] and any changes (up/down) [10] in the control variable and assigns a ramp time to the current signal state.
| Ramp time | Polarity of the control output | Signal changes in direction of… |
| ||
| t1 | + | Maximum value | 0 % |  | Maximum value (+) |
| t2 | + | 0 % | Maximum value (+) |  | 0 % |
| t3 | – | Maximum value | 0 % |  | Maximum value (–) |
| t4 | – | 0 % | Maximum value (–) |  | 0 % |
As long as the signal is being changed, the LED assigned to the current ramp is alight.
Ramp time call-ups [11]
When quadrant recognition is not activated, a separate ramp time “t1” to “t4” is assigned to each command value call-up “w1” to “w4”.
As long as a signal is being changed, the LED assigned to the current ramp time is alight.
Ramp time "t5” [12]
If neither quadrant recognition nor a call-up is activated, ramp time “t5” is always valid. This ramp time can be used, among others, for an emergency stop function. The valve can be closed with the defined ramp time “t5“.
Ramp time setting
The current ramp time can be checked at measuring socket “t“ [13]. Ramp times “t1” to “t4” can be adjusted with the help of the ramp time potentiometers. Through activation of a call-up signal, ramp time signal “t” at the measuring socket is clearly assigned to one of the ramp times t1 to t4. t5 is assigned to the ramp time signal at the measuring socket, if neither a callup nor quadrant recognition is activated. The adjustment range of the ramp time is selected so that these can be set reproducibly (for details, see chapter “Technical data”).
Note on the adjustment and measurement of the ramp time
For adjusting the ramp time potentiometers we recommend that 4-quadrant recognition be switched off and call-ups be activated.
| Value at measuring socket “t" | Ut in V | 5 | 3 | 2 | 1 | 0.5 | 0.3 | 0.2 | 0.1 | 0.05 | 0.03 | 0.02 |
| Current ramp time (±20 %) | t in ms | 20 | 33 | 50 | 100 | 200 | 333 | 500 | 1000 | 2000 | 3333 | 5000 |
The following is valid:
Example: Measured Ut = 5 V
Results in
Output
The output signal of the ramp generator can be checked at measuring socket “w” [14]. The downstream matching amplifier [15] provides the control signal for the valve via output “control variable” [16].
[ ] = Cross-reference to block circuit diagram see chapter "Symbols/Circuit diagrams"
Type code
| 01 | 02 | 03 | 04 | 05 | |||
| VT-SWMA-1 | ‒ | 1X | / | V0 | / | 0 | * |
| 01 | Analog command value module | VT-SWMA-1 |
| 02 | Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) | 1X |
| 03 | Basic version | V0 |
| 04 | Basic version | 0 |
| 05 | Further details in the plain text | * |
Technical data
General
| Component series | 1X | |
| Type of electronics | Analog | |
| Design | Modul |
Voltage supply
| Operating voltage | Nominal 1) | UB | VDC | 24 |
| Lower limit value | UB(t)min | V | 18 | |
| Upper limit value | UB(t)max | V | 35 | |
| Power consumption | PS | VA | 12 | |
| Current consumption | max. | Imax | A | 0.5 |
| Fuse | Thermal overload protection (with restart if the value falls below the temperature threshold) | |||
| 1) | +40 % –10 % |
Analog inputs
| Command value | Voltage | Differential input with attenuator | Ue | V | 0 … ±10 |
| Input resistance | RE | kΩ | > 50 |
Digital inputs
| Command value call-ups 1 to 4 | Active 1) | U | V | 8.5 ... 35 |
| Not active | U | V | 0 ... 6.5 | |
| Command value inversion “Inv“ | Active 1) | UInv | V | 8.5 ... 35 |
| Not active | UInv | V | 0 ... 6.5 | |
| Quadrant operation “4-Q“ | Active 1) | U4-Q | V | 8.5 ... 35 |
| Not active | U4-Q | V | 0 ... 6.5 |
| 1) | RE > 50 kΩ |
Analog outputs
| Voltage | Number and designation | 1 (control output) | ||
| Voltage 1) | U | V | 0 … ±10 | |
| Voltage | Load resistance | RL | kΩ | >5 |
| 1) | ±6 mA |
Adjustment options
| Adjustment range | Zero balancing (potentiometer “Z“) | % | ± 10 | |
| Amplitude attenuator (potentiometer “G“) | % | 0 to ca. 110 | ||
| Command values (potentiometers “w1“ to “w4“) 1) | % | 0 to ca. 110 | ||
| Ramp times (potentiometers “t1“ to “t5“) | t | s | 0.02 … 5 |
| 1) | Factory setting: 100 % |
Outputs
| Measuring socket for control variable “w“ 1) | Uw | V | 0 ... ±10 |
| Measuring socket for ramp time “t“ | Ut | 0.01 V to +10 V 0.01 V (tmax = ca. 10 s); 10 V (tmin = ca. 10 ms) |
| 1) | 10 V ≙ 100 %; -10 V ≙ –100 % |
Other information
| Type of connection | 12 screw terminals | ||
| Type of mounting | Top hat rail TH 35-7.5 according to EN 60715 | ||
| Type of protection according to EN 60529 | IP 20 | ||
| Dimensions (W x H x D) | mm | 40 x 79 x 85.5 | |
| Permissible operating temperature range | ϑ | °C | 0 … 50 |
| Storage temperature range | ϑ | °C | -25 … +85 |
| Weight | m | kg | 0.13 |
Notice:
For details regarding environment simulation tests in the field of EMC (electro-magnetic compatibility), climate and mechanical stress, see RE 29902-U (declaration on environmental compatibility).
(For applications outside these values, please consult us!)
Operating and display elements
Potentiometers (some with LED lamps)
| t1 … t5 | Ramp times |
| w1 … w4 | Command value call-ups |
| G | Amplitude attenuator for differential input |
| Z | Zero point calibration |
LED displays
| 4-Q | Quadrant recognition |
| Inv | Inversion active |
| green | Ready for operation “power“ (no lettering) |
Measuring sockets
| t | Current ramp time |
| w | Internal control output |
| ⊥ | Reference potential / ground |
Symbols/Circuit diagrams
1) Ramp time selection logic
2) Command value inversion +UInv
3) Differential input – Command value ± 10 V, ±Ucomm
4) Differential input – Reference potential
5) Call-up command value 1
6) Call-up command value 2
7) Call-up command value 3
8) Call-up command value 4
9) Quadrant operation +U4-Q
10) Operating voltage +U0
11) Operating voltage 0 V
12) Control variable output
13) Reference potential
| 1 | Power supply unit |
| 2 | Differential amplifier |
| 3 | Summator with zero point potentiometer |
| 4 | Amplitude attenuator |
| 5 | Call-up signals |
| 6 | Command value inversion |
| 7 | Priority logic |
| 8 | Quadrant recognition |
| 9 | Polarity recognition |
| 10 | Recognition of changes in the control variable (up/down) |
| 11 | Ramp time call-ups |
| 12 | Ramp time potentiometer “t5” |
| 13 | Measuring socket “ramp time signal” |
| 14 | Measuring socket “internal command value” |
| 15 | Matching amplifier |
Dimensions
Dimensions in mm
| 1) | Top hat rail TH 35-7.5 according to EN 60715 |
Project planning information
Engineering / Maintenance notes / supplementary information
- The amplifier module may only be unplugged when disconnected from the power supply!
- Ensure a sufficient distance to aerial lines, radio sources and radar equipment (>> 1 m)!
- Shield command value lines, do not lay near power cables!
- Caution: When the differential input is used, both inputs must be activated or deactivated simultaneously!
Note:
Electrical signals (e.g. control variable) brought out via control electronics must not be used for switching safety-relevant machines functions! (See also the European standard “Safety requirements for fluid power systems and components – hydraulics”, EN 982)
Ordering codes
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