
The positioner communicates and is pow
-
ered using IEC 61158-2 transmission tech
-
nology conforming to the PROFIBUS-PA
specification.
As a standard feature, the positioner comes
with a binary input for DC voltage signals to
signalize process information over the
PROFIBUS-PA.
The extended EXPERTplus diagnostics are in
-
tegrated into the positioner. They provide in
-
formation on the positioner and generates
diagnostic and status messages, which allow
faults to be pinpointed quickly.
The positioner is suitable for the following
types of attachment using the corresponding
accessories:
4
Direct attachment to SAMSON
Type 3277 Actuator: section 4.1
4
Attachment to actuators according to
IEC 60534-6 (NAMUR): section 4.2
4
Attachment to rotary actuators according
to VDI/VDE 3847: section 4.3
4
Attachment to Type 3510 Micro-flow
Valve: section 4.4
4
Attachment to rotary actuators according
to VDI/VDE 3845: section 4.5
3.1 Additional equipment
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).
Inductive limit switch
The rotary shaft of the positioner carries an
adjustable tag which actuates the installed
proximity switch.
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 by cable and piping for
air (only without inductive limit switch).
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.
EB 8384-4 EN 9
Design and principle of operation
Comentarios a estos manuales