WESTLOCK CONTROLS CORPORATION
280 N. MIDLAND AVE., STE. 258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
10/5/2013
TECH-477/D.W.O. 21424
Page 18 of 206
Electronic Device Description (EDD) provides an extended description of each object in the
device, and includes information needed for a control system or host to understand the
meaning of data. Used by the Siemens PDM.
FISCO
Fieldbus Intrinsic Safe COncept. Allows more power to an IS segment for approved FISCO
devices, allowing for more devices per IS segment.
FNICO
Fieldbus Non-Incendive COncept allows more power to a fieldbus segment in a Zone 2
Area, thus enabling more devices per segment than is possible with a FISCO solution.
Interoperability
Interoperability is the capability for a device from one manufacturer to interact with that of
another manufacturer on a fieldbus network without loss of functionality.
Intrinsic safety
(
IS
)
Intrinsic Safety is a protection method for safe operation of electronic equipment in
explosive atmospheres even under irregular operating conditions. It assures that the
available electrical and thermal energy in the system is always lower than the amount that
could cause ignition of the hazardous atmosphere.
Mode
Control block operational condition, such as manual, automatic, or cascade.
Segment
A Segment is a section of a PROFIBUS fieldbus terminated in its characteristic impedance.
Segments can be linked by Repeaters to form a longer fieldbus. Each segment can include
up to 32 H1 devices.
Spur
A Spur is a PA branch line connecting to the Trunk that is a final circuit. A Spur can vary in
length from 1 m (3.28 ft.) to 120 m (394 ft.).
Function Block (FB)
Function Blocks (FBs) are built into fieldbus devices as needed to achieve the desired
control functionality. Automation functions provided by FBs include Analog Input (AI),
Analog Output (AO), Discrete Input (DI) and Discrete Output (DO).
Device Type Manager
Device Type Manager is a device specific software component provide by the device
manufacture together with its device. This software is implemented following the FDT
specification.
FDT
FDT is a technology where it standardizes the communication between the device and the
application to provide sophisticated views of the device data for configuration, maintenance
and operation.
