Asco Series 349 Electronic Pressure Switch Owner's manual

Asco
Brand
Asco
Model
Series 349 Electronic Pressure Switch
Type
Owner's manual

Asco Series 349 Electronic Pressure Switch is a versatile device that offers a wide range of features and functions for precise pressure control and monitoring. It features two independent outputs that can be configured for normally open or normally closed operation, allowing for a variety of control options. The digital display clearly indicates the measured pressure and relevant settings, providing real-time information at a glance.

The pressure switch also incorporates advanced functions such as hysteresis and window comparator modes. Hysteresis mode allows for a specified pressure difference between the switch-on and switch-off points, preventing rapid cycling and ensuring stable operation. Window comparator mode enables the switch to operate within a predefined pressure range, providing added flexibility for specific applications.

Asco Series 349 Electronic Pressure Switch is a versatile device that offers a wide range of features and functions for precise pressure control and monitoring. It features two independent outputs that can be configured for normally open or normally closed operation, allowing for a variety of control options. The digital display clearly indicates the measured pressure and relevant settings, providing real-time information at a glance.

The pressure switch also incorporates advanced functions such as hysteresis and window comparator modes. Hysteresis mode allows for a specified pressure difference between the switch-on and switch-off points, preventing rapid cycling and ensuring stable operation. Window comparator mode enables the switch to operate within a predefined pressure range, providing added flexibility for specific applications.

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1. OUTPUT MODES
Hysteresis mode:
Adjustment of switch point H and hysteresis range h.
Ex.: H = 6 bar - h = 0.5 bar
N.O. (Normally Open)
4. CONFIGURATION OF N.O. / N.C. OUTPUTS AND
UNIT OF MEASURE
Factory setting:
6. LOCKOUT
Press the “mode” and “arrow down” keys simultaneously
to lock the pressure switch to prevent unwanted chan-
ges to the adjustments. Repeat the above procedure to
unlock the pressure switch and change the settings.
7. SETTING MODE
Initial settings: Output 1 & 2 = Normally Open
Unit of measure: bar
Desired setting for output 1 : Hysteresis mode;
switching at 6 bar;
hysteresis 0.5 bar.
■
Selection of mode for output 1:
9. ERROR MESSAGES
psi kgf/cm² MPa bar
H - 1 71 5.00 0.49 4.9
h - 1 14 1.00 0.10 1.0
H - 2 99 7.00 0.68 6.8
h - 2 14 1.00 0.10 1.0
Window comparator mode:
Adjustment of lower limit A and upper limit b.
Ex.: A = 4 bar - b = 6 bar
N.O. (Normally Open)
psi kgf/cm² MPa bar
A - 1 42 3.00 0.29 2.9
b- 1 71 5.00 0.49 4.9
A - 2 85 6.00 0.59 5.9
b - 2 113 8.00 0.78 7.8
2. FRONT PANEL
Display : Values previously set in setting mode
Pressure level in measurement mode
Mode : Key to select the different modes
Up & Down : Keys to change settings
Output LED : Indication of output status
Output 1 ON = red, Output 2 ON = green.
3. ELECTRICAL CONNECTION
- Outputs: N.C. or N.O. at choice, max. 125 mA
- pin 1 = V+ = 10.8 to 30 VDC
- pin 2 = output 2
- pin 3 = V
--
- pin 4 = output 1
Type Selected
unit of
measure
Display of
measured
pressure
To store the settings in the integrated EEPROM, press
the “mode” and the “arrow up” keys simultaneously.
Unit Output 1 Output 2
PNP bar HYS, N.O. HYS, N.O.
Select N.O. or N.C. for output 1
Select N.O. or N.C. for output 2
1x
bar
psi
kgf/cm²MPa
Select desired unit of measure
1x
1x
Pressure
display
5. ZERO-POINT ADJUSTMENT
To reset to zero without connecting to pressure supply.
Hold for
min. 3 sec
Pressure
display
Pressure
display
Select hysteresis or
window comparator mode
(e.g. hysteresis)
Pressure
display
Pressure
display
1x
■
Setting of values for output 1:
Display 1x
Select switch point for output 1
with “up” or “down” arrow keys
1x
Select hysteresis for output 1
with “up” or “down” arrow keys
1x
Pressure
display
■
Selection of mode for output 2:
Display
4x
Select hysteresis or
window comparator mode
(e.g. window comparator)
1x
Pressure
display
■
Setting of values for output 2:
Display
3x
Select lower limit for output 2
with “up” or “down” arrow keys
(e.g.: 4 bar)
1x
Select upper limit for output 2
with “up” or “down” arrow keys
(e.g.: 6 bar)
Pressure
display
1x
8. DISPLAY OF PEAK VALUE AND BOTTOM VALUE
The highest (max.) and lowest (min.) pressure values
measured from the time the outputs are connected to
power supply are stored in the integrated memory. The
values are displayed as follows:
Display
1x
Higest measured
pressure (e.g.: 7 bar)
Pressure
display
Display
1x
Lowest measured
pressure (e.g.: 2 bar)
Pressure
display
Pressure during zero-
point adjustment
exceeds ±3% F.S.
Overcurrent at output 1
Overcurrent at output 2
Applied pressure is
above calibrated
pressure range.
Readjust the zero
point in a different
pressure environment
Keep the current
below 125 mA at
maximum.
Check cabling.
Apply pressure
within the calibrated
pressure range.
Error
Message
Troubleshooting
Installation and operation
ELECTRONIC PRESSURE SWITCH WITH DIGITAL DISPLAY
Hysteresis and comparator functions
At 0 bar, the output signal is turned “OFF”. Whenever
pressure crosses above the switch point, the output si-
gnal is turned “ON”. As long as the pressure is above 5.5
bar (= 6 bar – 0,5 bar), the output signal remains “ON”.
Whenever pressure decreases and crosses below
5.5 bar, the output signal is turned “OFF”. In the N.C.
(Normally Closed) as opposed to the N.O. (Normally
Open) configuration, ON becomes OFF and vice-versa.
Factory setting:
outputs 1 & 2 in the hysteresis mode.
At 0 bar, the output signal is turned “OFF”. Whenever
pressure crosses above the lower limit, the output signal
is turned “ON”. As long as the pressure level remains
within the upper and lower limits of the window, the out-
put signal remains “ON”. Whenever the pressure crosses
above the upper limit, the output signal is turned “OFF”.
In the N.C. (Normally Closed) as opposed to the N.O.
(Normally Open) configuration, ON becomes OFF and
vice-versa.
Factory setting:
PROGRAMMING PROCEDURE
0
H
h
OFF
ON OFF
ON
0
OFF
ON
OFF
ON
Pressure
Output
LED 2
LED 1
Mode
+
--
CAUTION
OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE DEVICES
0
OFF
ON
0
A
b
OFF
ON
OFF
ON
ON
OFF
ON
OFF
ON
OFF
ON
Pressure
Output
Display sequence when power is switched on.
Desired setting for output 2:
Window comparator mode;
switching in 4 to 6 bar range
(lower limit A = 4, upper limit b = 6)
2x
GB
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Asco Series 349 Electronic Pressure Switch Owner's manual

Asco
Brand
Asco
Model
Series 349 Electronic Pressure Switch
Type
Owner's manual

Asco Series 349 Electronic Pressure Switch is a versatile device that offers a wide range of features and functions for precise pressure control and monitoring. It features two independent outputs that can be configured for normally open or normally closed operation, allowing for a variety of control options. The digital display clearly indicates the measured pressure and relevant settings, providing real-time information at a glance.

The pressure switch also incorporates advanced functions such as hysteresis and window comparator modes. Hysteresis mode allows for a specified pressure difference between the switch-on and switch-off points, preventing rapid cycling and ensuring stable operation. Window comparator mode enables the switch to operate within a predefined pressure range, providing added flexibility for specific applications.

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