Analog command value module VT-SWMA-1-1X

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.

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

Technical data

General

Voltage supply

Analog inputs

Digital inputs

Analog outputs

Adjustment options

Outputs

Other information

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)

LED displays

Measuring sockets

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

Dimensions

Dimensions in mm

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

Downloads

	Module analogique de consigne, Type VT-SWMA-1 Data Sheet | RF29902 | 2017-04-11 | French | PDF | 165k Product Groups: Analog, Modular design
	Modulo di comando analogico, Tipo VT-SWMA-1 Data Sheet | RI29902 | 2017-04-11 | Italian | PDF | 304k Product Groups: Analog, Modular design
	モジュール形プリセッタ, VT-SWMA-1 Data Sheet | RJ29902 | 2017-04-11 | Japanese | PDF | 247k Product Groups: Analog, Modular design
	Módulo analógico paravalores nominales, Tipo VT-SWMA-1 Data Sheet | RS29902 | 2017-04-11 | Spanish | PDF | 163k Product Groups: Analog, Modular design
	Analoges Sollwertmodul, Typ VT-SWMA-1 Data Sheet | RD29902 | 2017-04-11 | German | PDF | 190k Product Groups: Analog, Modular design
	Analogue command value module, Type VT-SWMA-1 Data Sheet | RE29902 | 2017-04-11 | English | PDF | 162k Product Groups: Analog, Modular design
	模拟控制值模块, VT-SWMA-1 Data Sheet | RC29902 | 2017-04-11 | Chinese | PDF | 785k Product Groups: Analog, Modular design
	Declaration on environmental compatibility in the fields of EMC, climate and mechanical stress Data Sheet | RE29902-U | 2007-07-01 | English | PDF | 60k Product Groups: Analog, Modular design
	Erklärung zur Umweltverträglichkeit für die Bereiche EMV, Klima und mechanische Belastung Data Sheet | RD29902-U | 2007-07-01 | German | PDF | 61k Product Groups: Analog, Modular design
	Analogue command value module Data Sheet | RE29902-01 | 2006-08-01 | English | PDF | 132k Product Groups: Analog, Modular design
	Analoges Sollwertmodul Data Sheet | RD29902-01 | 2006-08-01 | German | PDF | 134k Product Groups: Analog, Modular design