Siemens SIMATIC ET 200SP HA System Manual page 140

Glossary
Reference potential
Potential from which the voltages of the participating circuits are considered and/or measured.
Self-assembling voltage buses
Internal, self-assembling busbars that supply the I/O modules with voltage.
• P1 - L+ or supply voltage for the left I/O module with I/O redundancy (1P1)
• P2 - ground
• P3 - supply voltage for the right I/O module with I/O redundancy (1P3)
Sensor
Sensors are switches or sensors with and without transmitters.
Sensors convert physical variables (for example, temperature or movement) into electrical
signals.
Sensors
Sensors are used for accurate detection of digital and analog signals as well as routes, positions,
velocities, rotational speeds, masses, etc.
Server module
The server module completes the configuration of the distributed I/O.
SIMATIC method
The SIMATIC method is a communication protocol developed by Siemens for synchronizing
clocks in automation systems via Industrial Ethernet. The SIMATIC method uses a connectionless
multicast protocol.
Mode:
• PCS 7-compatible mode
• S5-compatible mode
SNMP
SNMP (Simple Network Management Protocol) is the standardized protocol for diagnosing and
also configuring the Ethernet infrastructure.
In the office area and in automation technology, devices support a wide range of manufacturers
on the Ethernet SNMP.
SNMP-based applications can be operated on the same network in parallel to applications with
PROFINET.
140
Modules for devices in a hazardous area
System Manual, 04/2021, A5E50165138-AA