Air treatment accessories:
pressure switches
series
PR
DIGITAL/ANALOG PRESSURE SWITCH SERIES PRDA
This series of switches has been expressly designed for the pressure
detection of a wide range of fluids with elevate accuracy and resolution.
This series has both digital and/or analog outputs and an integrated display
with a frontal interface including three buttons to programme different functions
(all described in the documentation that goes with the item) among which:
- setting the unit of measurement of the pressure;
- managing the outputs No.1 and No.2, depending on the set pressures.
This pressure switch, thanks to the very compact dimensions and to the
3 1⁄2 digit led display, is a very versatile item and suitable for the majority
of the applications with not corrosive and incombustible gases, and with
air. It is supplied completed with front protection cover and panel mounting
system type SFPR.
TECHNICAL DATA
Working temperature
Operating/setting pressure
Power supply voltage
Fluid
Max. load current
Average current consumption
Protection class
Response time
Display accuracy
Analog output
Linearity analog output
Display resolution
Switch output
Unit of measurement
Hysteresis
0 ÷ +50 °C
-1 ÷ 10 bar (0 ÷ 10 bar recommended)
DC: 12 ÷ 24 V ± 10%
Air; not corrosive and incombustible gases
80 mA
55 mA
IP 50
< 2.5 ms
<± 2% F.S. ± 1 digit with ambient temperature of 25 ± 3 °C
1 ÷ 5 V < ± 2.5%
± 1% F.S.
3 ½ digit 7 segments LED (sampling frequency: 5 Hz)
PNP; (NPN on request)
kPa, MPa, Bar, Psi
Manually adjustable between the 1 to 10%
of the rated pressure, or automatically arranged
approximately to the 3% F.S.
DIMENSIONS AND WEIGHT - PRDA
4
MATERIALS
Parts in contact with measured fluid
Lead wire
Electric connections
Carbon steel
5-conductors oil-proof cable
Brown: DC +
Blue: DC Black: OUT 1
White: OUT 2
Orange: Analog output
INTERNAL CIRCUIT AND WIRING - PNP
DC (+)
MAIN CIRCUIT
Brown
Analog output
Orange
Out1
Black
Out2
White
DC (-)
Blue
WEIGHT 135 g
PROTECTION COVER AND PANEL MOUNTING
SYSTEM sfpr*
TOTAL DIMENSIONS WITH SFPR
FRONTAL INTERFACE PRDA
* SUPPLIED AS STANDARD WITH PRESSURE SWITCHES SERIES PRDA
RED LED
3½ DIGIT LED
Displays:
current pressure
current mode
error mode
Displays OUT 2
switch output status
Lights up when ON
GREEN LED
Displays OUT 1
switch output status
Lights up when ON
GREEN
LED
SET
BUTTON
Use this button
to change the mode
or set value
UP BUTTON
Use this button to change
the mode or set value
Air treatment accessories: pressure switches series PR
DOWN BUTTON
Use this button
Use this
to change
button to change
the mode or
theset
mode
valueor set value
4.31
series
PR
Air treatment accessories:
pressure switches
FIXING BRACKETS STPR (pair)
4
DIAPHRAGM PRESSURE SWITCH SERIES PRC-PRA
TECHNICAL DATA
Max. switched voltage
Max. switched current
Max. fluid temperature
Adjusting range
Static overpressure
Tolerance at 20 °C
Hysteresis
Max. number of insertions
MATERIALS
Body
Diaphragm
Fixed contact
Moving contact
48 V AC - DC
0,5 A
80 ÷ 120 °C
1 ÷ 10 bar
80 bar
0,5 bar
6 ÷ 10% of setting value
200 per minute
PrC - PrA
CONNECTOR (protection class IP54) - CN/PR54
Brass
FPM (Viton®)
Silver
Phosphorous bronze with silver contact
CONNECTOR (protection class
IP65)
- CN/PR65
SIZE
WEIGHT 70 g
Symbol N.C.
Symbol N.O.
4.32
WEIGHT 15 g
Size
L1
L2
TYPE
G 1/8
G 1/4
10
12
51
53
PRC8
PRC4
Size
L1
L2
TYPE
G 1/8
G 1/4
10
12
51
53
PRA8
PRA4
Air treatment accessories: pressure switches series PR
WEIGHT 15 g
Air treatment accessories:
pressure switches
series
PR
CONTACTS EXCHANGE PRESSURE SWITCH SERIES PRCA
pRca
TECHNICAL DATA
Max. switched voltage
Max. switched current
Max. fluid temperature
Protection class
Adjusting range
Static overpressure
Tolerance at 20 °C
Hysteresis
Max. number of insertions
Connector (included)
250 V AC; 30 V DC
5 A in AC; 4 A in DC
100 °C
IP 65
0,5 ÷ 10 bar
150 bar
0,2 bar
15 ÷ 30% of setting value
200 per minute
ULR4P
N.O.
N.O.
MATERIALS
Body
Electric box
Diaphragm
Passivated steel
Anodized aluminium alloy
FPM (Viton®)
4
SIZE
Symbol N.C. / N.O.
WEIGHT 180 g
Size
L1
L2
L3
TYPE*
G 1/8
G 1/4
10
12
56
53
74
76
PRCA8
PRCA4
* These switches can rotate of 360°
Air treatment accessories: pressure switches series PR
4.33