Аналоговый модуль заданного значения 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 v