Glossary - Siemens SIMATIC ET 200S Installation And Operating Manual

Glossary

1oo1 Evaluation
-> 1oo1 Evaluation
Type of -> sensor evaluation – In 1oo1 evaluation, one -> sensor is connected to the F-
module by a single channel.
1oo2 Evaluation
-> 1oo2 Evaluation
Type of -> sensor evaluation - In 1oo2 evaluation, two input channels are occupied, either by
one 2-channel sensor or two single-channel sensors. The input signals are compared
internally for equivalence or non-equivalence.
Acknowledgment Time
During the acknowledgement time, the -> F-I/O acknowledge the sign of life specified by the
-> F-CPU. The acknowledgement time enters into the calculation of the -> monitoring time
and -> response time for the F-system as a whole.
Actuator
Actuators can be power relays or contactors for switching on consumers, or they can be
consumers themselves (for example, directly controlled solenoid valves).
AUX1 Bus
Power modules allow the additional connection of a voltage (24 V DC) that you can apply
over the AUX(iliary) bus. AUX(iliary) buses can be used individually as a protective
conductor bus or they can be used to supply additional voltage.
Availability
Availability is the probability that a system is functional at a specific point in time. It can be
increased by redundancy, for example, by using multiple -> sensors at the same measuring
point.
Backplane bus
The backplane bus is a serial data bus used by the interface module IM 151 to communicate
with the electronic modules and motor starters and to supply them with the required voltage.
ET 200S Distributed I/O System - Fail-Safe Modules
Hardware Installation and Operating Manual, 07/2005, A5E00103686-04
Glossary-1