SICK S300 Mini

Incremental encoder An incremental encoder generates electrical pulses proportional
t
o a movement. Various physical quantities can be derived from
these pulses, e.g. speed and distance covered.
Monitoring case A monitoring case signals the machine status to the safety laser
scanner. The safety laser scanner activates the field set, which is
assigned to the monitoring case and therefore a particular
machine status.
If a machine, e.g., has various operational statuses, a monitoring
case can be assigned to each operational status. The safety laser
scanner receives a defined signal for the current operational sta‐
tus via the control inputs or the network. If there is a change of sig‐
nal, the safety laser scanner switches from one monitoring case to
the monitoring case that is assigned to the new signal (as well as
the new operational status). Generally, one field set is assigned to
each monitoring case.
OFF state The OFF state is the status of the outputs of the protective device,
wher
e the controlled machine is triggered to quit its dangerous
state and the start-up of the machine is prevented (e.g., the volt‐
age at the OSSDs is LOW, so that the machine is switched off and
remains still).
ON state The ON state is the status of the outputs of the ESPE, where the
controlled machine is permitted to operate (e.g., the voltage at the
OSSDs is HIGH so that the machine can run).
OSSD Output signal switching device: signal output for the protective
de
vice, which is used for stopping the dangerous movement.
An OSSD is a safety switching output. The functionality of each
OSSD is tested periodically. OSSDs are always connected in pairs
and must undergo dual-channel analysis for safety reasons. An
OSSD pair is formed from 2 OSSDs that are connected and ana‐
lyzed together.
PFHD Probability of dangerous failure per hour
PL Performance level (ISO 13849)
PROFINET PROFINET (Process Field Protocol) is an Ethernet-based network
used in indus
trial automation.
With PROFIsafe , PROFINET is also suitable for safety-oriented
data communication.
Protective field The protective field protects the hazardous area of a machine or
v
ehicle. As soon as the electro-sensitive protective device detects
an object in the protective field, it switches the associated safety
outputs to the OFF state. This signal can be passed to controllers
resulting in the dangerous state coming to an end, e.g. to stop the
machine or the vehicle.
A horizontal or vertical protective field is required, depending on
the application. The electro-sensitive protective device can there‐
fore be mounted in horizontal or vertical alignment, depending on
the requirements.
GLOSSARY 15
8014170/ZA23/2019-11-14 | SICK O P E R A T I N G I N S T R U C T I O N S | S300 Mini
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Subject to change without notice