| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | |
| | | AS-Interface sensor-/actuator | | VAA-4E2A-G5-N/V2-Ex | | |
| | | module | | |
| | | |
| | | the supply voltage (AS-Interface) must be briefly isolated from the device. | | |
| | | | | | | | | | Ambient conditions | | | | | Ambient temperature | -20 ... 60 °C (253 ... 333 K) | | | | Storage temperature | -20 ... 85 °C (253 ... 358 K) | | | | Mechanical specifications | | | | | Protection degree | IP54 according to EN 60529 | | | | Connection | screw terminals | | | | Mass | 1.5 kg | | | | Mounting | screw mounting | | | | | | | | | |
| | | ■a "co "co | | |
| | | |
| | | |
| | | Notes Valve coupler: The block diagram at right illustrates the combined effect of the module and a valve switch. The module, with respect to the valve, provides a power source with internal resistance. The input circuit of the valve corresponds to the load resistance Ra of this circuit. Minimum currents and voltages must be available on the valve in order for the valve to switch correctly. The voltage Url drops across the cable resistance Rl due to the current Ira, which is the same throughout. | | |
| | | -iE | >. Si en «li -5 <° = o o ».2 .S! ro P .Sì Litt 3 ■o o E <D O) _o (C < 3 ■o o E a> .c Ö o (/) <D (/) <D .> o 3 ■o _c _ o £ 2 <D O "m (/) O C ~ <D O (/) -C CL Ü) <ï> "O O o sa o ce a> o (/) (/) <D O O < | | |
| | | |
| | | Rl | | |
| | | |
| | | Url | | |
| | | |
| | | 4 w | | |
| | | 1 | | |
| | | < oc | | |
| | | |
| | | Ra | | |
| | | |
| | | |
| | | |
| | | 'RA | | |
| | | |
| | | G: Professional generator Ri: Internal resistor Rl: Lead resistance RA: Load resistor Uao: Quiescent voltage Ua: Output voltage Url: Voltage drop on lead resistance Ura: Voltage drop on load Uo: max. voltage Io: max. current Iak: Short-circuit current Ira: Load current | | |
| | | |
| | | The output characteristic diagram at right shows the generator characteristic and the resistance line of the valve. The difference between the URA and the actual output voltage UA meets the maximum voltage drop across the cable. From that, the maximum cable length and resistance can be calculated. However, the calculation does not take into account the requirements per DIN EN 50020 (Instrinsic Safety).Therefore, the user should test the system to ensure that maximum values for external inductance and capacitance are not exceeded. | | |
| | | |
| | | Output characteristic E: Curve angle point (Ue/Ie) Output characteristic | | |
| | | U UO UAO UA | | |
| | | |
| | | | | |
| | | lo o o CM o o CM | | |
| | | |
| | | |
| | | CD eg o -2 05 | | |
| | | |
| | | |
| | | CT) s o CM | | |
| | | tZZ2unpermissible area for cocks | | |
| | | |
| | | |
| | | |
| | | Subject to reasonable modifications due to technical advances. | | Copyright Pepperl+Fuchs, Printed in Germany | | |
| | | |
| | | 210 Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com | | |
| | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |