Festo CTEU-DN, Description, Functions And Maintenance, Page: 107 / 130

A. Technical appendix
A-9
Festo P.BE-CTEU-DN-OP+MAINT-EN en 1206NH
Abbreviation/term Significance
I/O diagnostics
interface Diagnostic interface at I/O level, which enables access to the internal data
of the bus node and the connected devices or modules
IPC Industrial PC
I-port I-port is a Festo-specific interface for transmitting communication data
(process data, sensor signals, pilot signals) and supply voltages. The
I-port communication protocol is based on the IO link protocol. The
electrical and mechanical link between bus nodes and I-port device is
standardised.
Load voltage Comprises the voltage supply for connected devices and outputs,
e.g. I-port devices, electrical analogue or digital outputs, solenoid coils of
valves etc. (load voltage supply
see also “Operating voltage”: Voltage
supply for electronics and sensors)
O Output
Object Directory Makes all important fieldbus/network participant parameters accessible
in a standardised manner
ODVA Open Device Vendor Association, DeviceNet umbrella organisation
Operating voltage Also referred to as signal voltage; comprises the voltage supply for the
electronics/sensors (power supply
see also “Load voltage”: voltage
supply for outputs)
PDO Process Data Objects facilitate the fast transmission of process data via
Multicast connection and are transmitted by simple DeviceNet messages
without protocol overhead; PDOs can be transmitted event-controlled,
synchronised with a system cycle or on request; a distinction is drawn
between
“TPDOs” and “RPDOs”
PELV (Protective
Extra-Low Voltage) Protective Extra-Low Voltage
Tab. A/7: System-specific terms and abbreviations (General overview – Part 2)