Connecting Loads To A Voltage Output Of An Isolated Ao Over A Four-Conductor Connection - Siemens SIMATIC S7-300 Reference Manual

Programmable logic controllers module data

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Analog Modules

Connecting Loads to a Voltage Output of an Isolated Module over a

Four-Conductor Connection

A high accuracy at the load can be achieved through the four-conductor

connection. You must therefore connect the sensor leads (S– and S+) directly to

the load. The voltage is thus measured and corrected directly at the load.

Interferences or a voltage drop can result in a potential difference between the

sensor lead S– and the reference circuit of the analog circuit M

difference must not exceed the permissible value. If the permissible potential

difference is exceeded, the accuracy of the analog signal is impaired.

Connecting Loads to a Voltage Output of an Isolated AO over a Four-Conductor Connection

Programmable Logic Controllers S7-300 Module Data

. This potential

A5E00105505-03

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