Samson 3730-4 - Communication

The positioner communicates and is pow
-
ered using IEC 61158-2 transmission tech
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nology conforming to PROFIBUS-PA specifi
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cation.
As a standard feature, the positioner comes
with a binary input for DC voltage signals to
signalize process information over the
PROFIBUS-PA.
1.1 Additional equipment
Version with solenoid valve
If the operating voltage for the solenoid
valve (12) fails, the supply pressure for the
booster is vented to the atmosphere. As a
result, the actuator is vented and the valve
moves to the fail-safe position.
NOTICE
In manual mode (MAN), the manual set
point is also reset to 0 %. A different manual
set point must be entered again (Code 1).
Version with inductive limit switch
The rotary shaft of the positioner carries an
adjustable tag which actuates the installed
proximity switch.
Version with binary contact
All positioners are fitted with a binary input
for DC voltage signals over which process
information can be issued over the
PROFIBUS-PA network.
Another optional binary input is an active
input powered by the positioner to connect a
floating contact. Its switching condition can
also be issued over the PROFIBUS-PA net
-
work.
Version with external position sensor
In this version, only the sensor is mounted to
the control valve. The positioner is located
separately from the valve.
The connection of x and y signals to the
valve is established via cable and piping for
air (only without inductive limit switch).
1.2 Communication
The positioner is completely controlled over
the digital signal transmission implemented
complying with PROFIBUS-PA Profile B as
per DIN EN 50170 and DIN 19245 Part 4.
Data are transmitted as bit-synchronous cur
-
rent modulation at a rate of 31.25 kbit/s
over twisted-pair cables conforming to
IEC 61158-2.
Usually, the positioner settings are made on
a computer which is connected to one or
more positioners linked over a segment cou-
pler to the PROFIBUS segment of the com-
puter.
Configuration using TROVIS-VIEW software
The positioner can be configured using
TROVIS-VIEW Configuration and Operator
Interface software.
The positioner is equipped with an addi
-
tional digital SERIAL INTERFACE to allow a
computer to be connected over an adapter
cable from the RS-232 interface of the com
-
puter to the positioner.
The TROVIS-VIEW software enables the user
to easily set parameters in the positioner
and view process parameters online.
10 EB 8384-4 EN
Design and principle of operation