Signal converters are used in analog signal processing for

• Electrical separation
• Conversion of normalized and non-normalized signals
• Amplification and impedance adaptation
• Conversion to a frequency for processing by a digital input
• Overvoltage and EMC protection
• Short-circuit protection of the outputs

3RS7025 manual / automatic transformer

For special applications in which analog signals have to be simulated, or during plant commissioning when the actual process value is not yet available, the 3RS7025 devices feature an adjustable potentiometer for manual setpoint selection and a manual/automatic switch.

The potentiometer for the 3RS7025 devices is used to simulate analog output signals when the changeover switch is set to "Manual" and the control supply voltage is applied, without the need for an analog input signal, and the scale ranges from 0 % to 100 %.

Example: When it is set for an output of 4 mA to 20 mA, the 0 % scale value on the potentiometer represents an output current of 4 mA and the 100 % scale value represents an output current of 20 mA. In the "Auto" switch position, the output signal follows the input signal proportionally regardless of the potentiometer setting.

Application example: Analog signal processing