Ax34601a_e_A5.doc / Feb-06
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Input A = current, Input B = voltage
Default factory setting:
Input A = current, Input B = current
•
Current inputs are automatically set to an input signal range of 0 to 20 mA or
4 to 20 mA
•
Voltage inputs are set to an input signal range of -10 volts to +10 volts.
Where your application needs a different voltage range, you can modify the corresponding
input to accept voltages up to 120 volts, by adding a serial resistor to the input terminal (please
observe safety standards!)
The subsequent formula shows how to calculate the serial resistor.
Rx [ k
Ω
] = 3 x Ux [ V ] - 30
Rx = Wert des Vorwiderstandes
Ux = Maximale Eingangsspannung
Example: If your input range should be 100 volts: Rx = 300 – 30 (k
Ω
) = 270 k
Ω
When afterwards you set the scaling of the diplay, your individual input range will be treated
like a 10 volts input signal without an external resistor.
