Description Component series 1X Analog, Euro-card format For valves: FES 50 and FES 63 (as of component series 3X) Features Differential input, switchable from voltage to current input Two non-isolated command value inputs Enable input and "ramp off" input Amplitude, zero point and adjustable ramp time Reverse polarity protection for the operating voltage Outputs for command value and actual value LED display for "ready for operation" Product description Notice: 0 V command value presetting does not mean "orifice in seat position". At an actual value of 0 V, the orifice spool is in positive overlap. A command value of 0 V results in an actual value of 0 V. Depending on the pressure differential, leakage oil is still flowing. If no enable signal is applied or the output stage is blocked due to a fault, the orifice spool falls into the seat and ensures leak-free sealing. In seat position, the measurable actual value is > +0.5 V (valve type dependent). When using an external time potentiometer, the internal potentiometers for the ramp times must be set to maximum (voltages at the "t1" and "t2" measuring sockets approx. 20 mV). The maximum ramp time is reduced as the resistance value of the external potentiometer is switched in parallel to that of the internal potentiometer (approx. 500 kΩ). In this case, the ramp times for upwards and downwards ramp cannot be set separately. By applying a voltage >10 V to the "Ramp off" switching input or setting the plug-in jumper X4, the ramp time is set to its minimum value (approx. 15 ms). The switching input will then be ineffective. The minimum value is then valid for both directions. Calculation of the ramp times Jumper X9 plugged (ramp time "short") Jumper X8 plugged (ramp time "long") The following applies: U = Voltage in volt at measuring socket "t1" or "t2" t = Ramp time in seconds for upwards and downwards ramp Ramp function The down-stream ramp generator [3] generates a ramp-shaped output signal from a given step-shaped input signal. The time constants of the output signal (ramp times) can be adjusted using the "t1" (upwards ramp) and "t2" (downwards ramp) potentiometers accessible through the front plate. The specified maximum ramp time refers to a command value step of 100 % and may be approx. 5 s or 50 s depending on the jumper setting (X8, X9). If a command value step of less than 100 % is switched to the ramp generator input [3], the ramp time will be correspondingly shorter. The current ramp time can be checked at the "t1" (upwards ramp) and "t2" (downwards ramp) measuring sockets. For detailed information, refer to Technical data Power supply unit After application of the operating voltage, the internal power supply unit [6] creates a voltage of ±9 V as compared to measurement zero (M0). Measured against load zero (L0), it is raised by +9 V. The voltages +9 V and –9 V (–9 V corresponds to L0) are fed to the connector strip X1 and can be used externally (e.g. for a command value potentiometer). Th
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