Name: Siemens SIMATIC S7-300 Module data
Brand: Siemens
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S7-300 Automation System Module data

Manual, 08/2006, A5E00105505-04

Glossary-1

Glossary

2-/3-/4-wire connection

Methods of connecting resistance thermometers / resistances to the front connector of the

module, or loads to the voltage output of an analog input module.

2-wire transducer (passive sensor) / 4-wire transducer (active sensor)

Type of transducer ( 2-wire transducers: power supply via terminals of the analog input

module; 4-wire transducers: power supply via separate terminals of the transducer.)

Absolute encoder

Determines the distance traveled by reading a numerical value: When using absolute

encoders with serial interface (SSI), the path information is transferred synchronously and

serially according to the SSI protocol (synchronous serial interface).

Address

Represents the identifier of a specific address or address range. Examples: input I 12.1; flag

word MW 25; data block DB 3.

Backplane bus

Serial data bus for module intercommunication, and power distribution to the modules. Bus

connectors interconnect the modules.

Basic conversion time

Time required for the actual coding of a channel (integration time, plus all times required by

the internal control, i.e. the channel is fully processed when this time has expired.

Basic error limit

Represents the operational limit at 25 °C, relative the module's rated range.

Basic execution time

Cycle time of an analog IO module when all of its channels are enabled. Equivalent to

"number of channels x basic conversion time."

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