ELECTRONIC PRESSURE SWITCHES
PRODUCT DATA
PST... and PST...-R
FEATURES
polybutylene terephtalate (PBT)
-20...+60 °C
-35...+80 °C
-20...+100 °C
0...95%, non-condensing
0.5% of final value
0.3% per 10 K (0.5% per 10 K
in case of 250/400/600 mbar)
Total weight
380 grams
Parts in contact with medium
High-pressure versions 1.4571 + 1.4542
Low-pressure / flush
1.4571 + 1.4435
Process connection
Manometer connection G1/2" external thread
Flush connection
G3/4" external thread
Electrical connection
PST series
5-prong M12 plug, A-coded as per
DIN IEC 60947-5-2
PST...-R series
Extra 3-prong M12 plug
Protection class
II as per EN 60335-1
Protection type
IP65 as per EN 60529
Climate class
C as per DIN IEC 60654
Power supply
15...36 Vdc, max. 100 mA
EMC
compatible as per EN61326/A1
Switch outputs (all versions)
Open-Collector outputs Two; configurable as high-side/
low-side or as push-pull switches,
max. load: 250 mA / 15...36 Vdc
Reaction time
30 ms
Switching difference
(SP and RP) configurable
Relay outputs (PST...-R series)
Contact type
1 switch-over contact
Min. electrical lifetime 250,000 switching cycles
Switching performance, gold contacts (AgSn0
2
+Au)
AC1 (resistive)
1.5 VA (24 Vdc / 60 mA, 230 Vac /
6.5 mA)
AC15 (inductive)
unsuitable
Max. switch-on current 60 mA for < 5 ms
Min. switching perf.
50 mW (either > 5 V or > 2 mA)
Switching performance, silver contacts (AgSn0
2
)
AC1 (resistive)
690 VA (230 Vac / 3 A)
AC15 (inductive)
230 VA (230 Vac / 1 A)
Max. switch-on current 30 A for < 5 ms
Min. switching perf.
500 mW (> 12 V or > 10 mA)
Diagnostic output
Output configuration
warning output (plug 2),
max. 20 mA, 15...36 Vdc
Transmitter output (analog output)
Voltage / current
0...10 V and 4...20 mA,
configurable in expert mode
Transient response
approx. 300 ms
Housing and back
Max. ambient temp.
Storage temperature
Temperature, medium
Relative air humidity
Accuracy, total
Medium temp. drift
APPLICATION
Honeywell FEMA's PST and PST...-R series Electronic
Pressure Switches require adjustment (configuration and
parameterization) in only two modes (the basic mode and
the expert mode) and are suitable for an extremely wide
range of applications, including the precision-adjustment
and monitoring of system pressures in the field of plant
construction, fluidics, process technology, and pneumatics,
as well as in the monitoring and control of pumps and
compressors.
Due to their monitored sensors with a standardized warning
output, these devices are suitable for use in manufacturing
lines in the automotive industry as well as in the area of
machine tool construction. These switches provide
sufficient accuracy (0.5% of final value) for measurement
monitoring in many laboratory applications.
®
U.S Registered Trademark
Copyright © 2009 Honeywell Inc.
•
All Rights Reserved
EN0B-0346GE51 R0609
PS, PST, AND PST...-R ELECTRONIC PRESSURE SWITCHES
VARIANTS
The electronic pressure switches are available in two
variants, easily distinguishable by the number of M12 plugs
present on the rear side.
PST... Series
The devices of this series provide both switching
functionality and transmitting functionality.
plug 2:
power supply,
AOUT, and WARN
PST...-R Series
Like PST... Series devices, the devices of this series
provide switching and transmitting functionality, but also
relaying functionality.
plug 2:
power supply,
AOUT, and WARN
plug 3:
switch-over
contact relay
plug 1:
power supply,
OUT1, and OUT2
Fig. 1. PST... Series, rear view of housing
plug 1:
power supply,
OUT1, and OUT2
Fig. 2. PST...-R Series, rear view of housing
EN0B-0346GE51 R0609
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PS, PST, AND PST...-R ELECTRONIC PRESSURE SWITCHES
FUNCTION
The PST and PST...R Electronic Pressure Switches are
screwed directly into the pressure line or the boiler's
connection nozzle. When monitoring gaseous media and
low-viscosity liquids, G1/2" standard manometer can be
used. In the case of high-viscosity and roiled liquids, G3/4"
(flush) process connections must be used.
The LCD display screen indicates the pressure as a 4-digit
digital value and as an analog value (bar graph).
Two LED's provide information on the switching status of
the outputs and on the alarm status.
The device is configured and parameterized using the large
rotary/push button. The user can move from screen to
screen and enter values and/or change configurations by
rotating the button. Values and configurations are
confirmed and/or stored by pressing this button.
Parameterization and configuration are performed in only
two modes (the basic mode and the expert mode).
Expert Mode (Configuration)
Output 1 (OUT1)
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Configurable as a maximum or minimum monitor.
Configurable as a window monitor.
Configurable as normally-open or normally-closed.
Configurable as low-side/high-side switch or as push-
pull switch.
Output 2 (OUT2)
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Configurable as a maximum or minimum monitor.
Configurable as a window monitor.
Configurable as normally-open or normally-closed.
Configurable as low-side/high-side switch or as push-
pull switch.
Configurable as a warning output (max. 250 mA).
Analog Output (AOUT)
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Configurable as a 0...10 V / 10...0 V or 4...20 mA /
20...4 mA output (default setting: 0...10 V)
Basic Mode (Parameterization)
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Outputs 1 and 2: Adjustment of the switch-points (SP)
and reverse switch-points (RP).
Adjustment of the lower (ZERO) and upper (FSO =
"full-scale output") reference values for limiting the
analog output signal to a defined pressure range.
Setting of a filter value in a range of 0...95% (ATT).
When locked, can be unlocked by entering a CODE.
Additional Configuration
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Relay output (REL) configurable to be coupled with
OUT1, OUT2, or the warning output.
Selection of the pressure units (bar, Pa, or psi) in the
UNIT display.
Data restorable using the REST command.
Selection of a 4-digit locking code (0001 to 9999) in
the CODE display (0000 = no code).
Simulation mode:
–
Using the rotary/push button, the pressure can be
simulated over the entire range ("SIM1" shown in
display).
–
The outputs can switch alternately ("SIM2" shown
in display) in order to test the installation's reaction
time in the range of from 4 times per second to
once every 16 seconds (corresponding to a range
of 0...100%).
The LCD display's backlighting can be switched from
"on continuously" ("LCD+" shown in display) to "turned
off when rotary/push button not operated for 30 sec"
("LCD-" shown in display).
Electronic drag indicator (represented in the LCD
display by a dotted arrow) for indicating the max./min.
pressure. After pressing the rotary/push button, the
user can (in the EDIT mode) read off the elapsed time
(in hours; resolution: 0.01 h) between the event and
the present time.
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EN0B-0346GE51 R0609
PST AND PST...-R ELECTRONIC PRESSURE SWITCHES
PROCESS CONNECTIONS
The device is connected to the pressure-side via a G1/2" standard manometer threaded connection or a G3/4" flush process
connection (see fig. below). The geometry of the G1/2" and G3/4" connections conforms to DIN EN 837.
70
60
LCD
display
LED’s for
OUT1 + OUT2
rotary/push
button
1
2
98
standard
manometer
(or flush)
process
connection
standard: 40
(flush: 33)
standard: SW27
(flush: SW32)
EN0B-0346GE51 R0609
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PST AND PST...-R ELECTRONIC PRESSURE SWITCHES
PRODUCT IDENTIFICATION SYSTEM
PST
= Pressure Switch + Transmitter
PST...-R = Pressure Switch + Transmitter + Relay
R = Relative pressure sensor
A = Absolute pressure sensor
-R = Relay version
(galvanically separated
switch-over contact)
P ST 0 0 1R G 3 4F -R
G12S = G1/2” Standard manometer
G34F = G3/4” Flush version
V01
M250
M400
M600
001
= -1...+1 bar
= 0...25 mbar
= 0...400 mbar
= 0...600 mbar
= 0...1
bar
002
002
004
010
=
=
=
=
0...1.6
0...2
0...4
0...10
bar
bar
bar
bar
025
060
100
250
600
=
=
=
=
=
0...25
0...60
0...100
0...250
0...600
bar
bar
bar
bar
bar
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EN0B-0346GE51 R0609
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