Sensor systems 2 AS-Interface
Sensor systems 2 AS-Interface Sensor systems 2 AS-Interface
Masters and Gateways Power Supplies, Extender, Repeaters Safety at work I/O Modules Control cabinet I/O Modules Field application Analogue modules Other modules Inductive sensors Photoelectric sensors Rotary encoders Accessories AS-Interface sensor-/actuator module the supply voltage (AS-Interface) must be briefly isolated from the device. 210 Ambient conditions Ambient temperature -20 ... 60 °C (253 ... 333 K) Storage temperature Mechanical specifications -20 ... 85 °C (253 ... 358 K) Protection degree IP54 according to EN 60529 Connection screw terminals Mass 1.5 kg Mounting screw mounting Notes VAA-4E2A-G5-N/V2-Ex 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 R A of this circuit. Minimum currents and voltages must be available on the valve in order for the valve to switch correctly. The voltage U RL drops across the cable resistance R L due to the current I RA , which is the same throughout. G R i U A/ I AK G: Generator R i : Internal resistor R L: Lead resistance R A : Load resistor U A0 : Quiescent voltage U A : Output voltage U RL : Voltage drop on lead resistance U RA : Voltage drop on load U 0: max. voltage I 0 : max. current I AK : Short-circuit current I RA : Load current R L U RL I RA R A URA The output characteristic diagram at right shows the generator characteristic and the resistance line of the valve. The difference between the U RA and the actual output voltage U A 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. U UO UAO UA URL URA Output characteristic E: Curve angle point (U E /I E ) Output characteristic I RA I AK I O I unpermissible area for valves Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group Tel.: Germany +49 621 776-0 USA +1 330 4253555 Singapore +65 67799091 Internet http://www.pepperl-fuchs.com E Issue date 2004-11-19 - Catalogue AS-Interface 2004/2005
Issue date 2004-11-19 - Catalogue AS-Interface 2004/2005 Notes Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group Tel.: Germany +49 621 776-0 USA +1 330 4253555 Singapore +65 67799091 Internet http://www.pepperl-fuchs.com 211 Masters and Gateways Power Supplies, Extender, Repeaters Safety at work I/O Modules Control cabinet I/O Modules Field application Analogue modules Other modules Inductive sensors Photoelectric sensors Rotary encoders Accessories
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Issue date 2004-11-19 - Catalogue <strong>AS</strong>-<strong>Interface</strong> 2004/2005<br />
Notes<br />
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany<br />
Pepperl+Fuchs Group Tel.: Germany +49 621 776-0 USA +1 330 4253555 Singapore +65 67799091 Internet http://www.pepperl-fuchs.com 211<br />
Masters and<br />
Gateways<br />
Power Supplies,<br />
Extender, Repeaters<br />
Safety at work<br />
I/O Modules<br />
Control cabinet<br />
I/O Modules<br />
Field application<br />
Analogue modules<br />
Other modules<br />
Inductive sensors<br />
Photoelectric<br />
sensors<br />
Rotary encoders<br />
Accessories
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