Differenceamplifier(P Controller); Input Signal Range Andamplification; Inputcircuitry; Circuitry Possibilities And Output Signal Range - Siemens SIMATIC S5 1P 243 Equipment Manual

Function Description
3.7 Difference Amplifier (P Controller)
3.7.1 Input Signal Range and Amplification
Voltages in the range from – 10Vto + 10 V can be applied at the input of the two difference amplifi-
ers. The desired amplification is set via the trimming potentiometer. For each of the two P control-
lers, one trimming potentiometer is available on the module front plate, and amplification factors
from 1.1 to 20 can beset. The difference between the input voltages applied at P+ and P– is am-
plified.
3.7.2 Input Circuitry
Since the two P controllers are built as device amplifiers, both input values have the same polarity.
Input circuitry of the difference amplifiers (for each amplifier)
Difference +
Difference – AR9/11

3.7.3 Circuitry Possibilities and Output Signal Range

The inputs and outputs of the difference amplifiers are routed to the analog jumpering block and
can be connected to other analog signals also running to this same soldering base. Amplifier input
values, for example, can be signals coming via the channels of the analog value conditioning cir-
cuits, or values provided by the digital/analog converters. Again, the respective output of the P
controller can be either applied to the digital/analog converter or to the comparators, or it can im-
mediately be used as an analog output. The output signal range of the difference amplifiers is
within +1 O V.
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3 –
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