AX34509a_e.doc / Aug-10
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Current inputs are automatically scaled to an input range of 0/4 – 20 mA.
Voltage inputs use the standard range of +/- 10V.
You are free to measure voltages up to 120 volts DC by use of a remote resistance in series to
the input line (please observe applicable safety standards!). You can calculate the value from
the formula
Rx [ k
Ω
] = 3 x Vx [ V ] - 30
R = resistance value
V = input voltage
Example: Desired input = 100 volts:
R = [ 3 x 100 ] – 30 (k
Ω
) = 270 k
Ω
With regard to the scaling procedure described later, the new maximum input with resistance
will work like a 10 volts signal with no resistance
