705-5100-F21 datasheet(5/52 Pages) MAGNETROL

5 / 52 page

Details regarding cable specifications, grounding, termination,

and other network information can be found in IEC 61158

or the technical guideline “PROFIBUS PA™ User and

Installation Guideline” at www.profibus.com.

1.2

Benefits

The benefits of PROFIBUS PA™ can be found throughout

all phases of an installation:

1. Design/Installation: Connecting multiple devices to a single

pair of wires means less wire and fewer I/O equipment.

Initial Engineering costs are also reduced because

PROFIBUS International requires interoperability, defined

as “the ability to operate multiple devices in the same system,

regardless of manufacturer, without a loss of functionality.”

All PROFIBUS PA™ devices must be tested for

interoperability by a PI accredited, independent testing

agency. Magnetrol Model 705PA device certification infor-

mation can be found at www.profibus.com.

2. Operation: A PROFIBUS PA™ system allows for multiple

variables to be brought back from each device to the control

room for additional trending and reporting.

3. Maintenance: The self-diagnostics residing in the smart

field devices minimizes the need to send maintenance

personnel to the field.

1.3

Device Configuration

The function of a PROFIBUS PA™ device is determined by

the arrangement of a system of blocks. The types of blocks

used in a typical User Application are described as follows:

Physical Block describes the characteristics of the

PROFIBUS PA™ device such as the device name,

manufacturer, and serial number.

Function Blocks are built into the PROFIBUS PA™ devices

as needed to provide the desired control system behavior.

There can be numerous function blocks in a single User

Application.

Transducer Blocks contain information such as calibration

parameters and sensor type. They are used to connect the

sensor to the input function blocks.

An important requirement of fieldbus devices is the interop-

erability concept mentioned earlier. Device Description

(DD) technology can provide extended descriptions for

each object and provides pertinent information useful for a

host system.

57-645 Eclipse Guided Wave Radar Transmitter - PROFIBUS PA™

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