IFM PN422 Series User manual

Operating instructions
Pressure sensor
PN422x
11426187 / 00 01 / 2022
UK

2
Contents
1 Preliminary note���������������������������������������������������������������������������������������������������3
1�1 Symbols used ������������������������������������������������������������������������������������������������3
2 Safety instructions �����������������������������������������������������������������������������������������������3
3 Functions and features ����������������������������������������������������������������������������������������4
4 Function���������������������������������������������������������������������������������������������������������������5
4�1 Switching function������������������������������������������������������������������������������������������5
5 Installation������������������������������������������������������������������������������������������������������������6
5�1 Installation of the sensor��������������������������������������������������������������������������������6
5�2 Installation of the grounding clamp����������������������������������������������������������������6
6 Electrical connection��������������������������������������������������������������������������������������������8
7 Operating and display elements ������������������������������������������������������������������������10
8 Menu������������������������������������������������������������������������������������������������������������������ 11
8�1 Menu structure��������������������������������������������������������������������������������������������� 11
8�2 Explanation of the menu������������������������������������������������������������������������������12
9 Parameter setting ����������������������������������������������������������������������������������������������12
9�1 Parameter setting in general �����������������������������������������������������������������������12
9�2 Set output signals ����������������������������������������������������������������������������������������14
9�2�1 Set switching limits �����������������������������������������������������������������������������14
9�2�2 Setting of the output function��������������������������������������������������������������14
9�3 User settings (optional)��������������������������������������������������������������������������������14
9�3�1 Set the unit of measurement for system pressure������������������������������14
9�3�2 Configuration of the display ����������������������������������������������������������������14
9�3�3 Zero-point calibration��������������������������������������������������������������������������15
9�3�4 Set delay time for OUT1 ���������������������������������������������������������������������15
9�3�5 Setting the damping for OUT1 �����������������������������������������������������������15
9�4 Service functions �����������������������������������������������������������������������������������������15
9�4�1 Read min/max values for the system pressure ����������������������������������15
10 Operation���������������������������������������������������������������������������������������������������������16
10�1 Operating indicators ����������������������������������������������������������������������������������16
10�2 Read set parameters ���������������������������������������������������������������������������������16
10�3 Error indications�����������������������������������������������������������������������������������������16

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1 Preliminary note
1.1 Symbols used
►Instructions
> Reaction, result
[…] Designation of pushbuttons, buttons or indications
→Cross-reference
Important note
Non-compliance can result in malfunction or interference�
Information
Supplementary note�
2 Safety instructions
• The device described is a subcomponent for integration into a system�
- The manufacturer is responsible for the safety of the system�
- The system manufacturer undertakes to perform a risk assessment and to
create a documentation in accordance with legal and normative requirements
to be provided to the operator and user of the system� This documentation
must contain all necessary information and safety instructions for the operator,
the user and, if applicable, for any service personnel authorised by the
manufacturer of the system�
• Read this document before setting up the product and keep it during the entire
service life�
• The product must be suitable for the corresponding applications and
environmental conditions without any restrictions�
• Only use the product for its intended purpose (→ Functions and features).
• Only use the product for permissible media (→ Technical data).
• If the operating instructions or the technical data are not adhered to, personal
injury and/or damage to property may occur�
11 Technical data and scale drawing ��������������������������������������������������������������������16
12 Factory setting �������������������������������������������������������������������������������������������������17

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• The manufacturer assumes no liability or warranty for any consequences
caused by tampering with the product or incorrect use by the operator�
• Installation, electrical connection, set-up, programming, configuration, operation
and maintenance of the product must be carried out by personnel qualified and
authorised for the respective activity�
• Protect units and cables against damage�
• Use in gases at pressures > 25 bar only on request�
3 Functions and features
The pressure sensor detects the system pressure�
• It is shown on a display�
• It generates 1 output signal according to the set output configuration:
OUT1 = switching signal for system pressure limit value�
Applications
Type of pressure: relative pressure
Information on pressure rating and bursting pressure → data sheet.
Pressure Equipment Directive (PED): Units with a final value of the
measuring range of 1���400 bar comply with section 3, article (3) of the
Directive 97/23/EC and are designed and manufactured for group 2 fluids
(stable gases and non-superheated liquids) in accordance with the sound
engineering practice�
Avoid static and dynamic overpressure exceeding the specified overload
pressure by taking appropriate measures�
The indicated bursting pressure must not be exceeded�
Even if the bursting pressure is exceeded only for a short time, the unit
may be destroyed� ATTENTION: Risk of injury!
Use in gases at pressures > 25 bar only on request�
Indication of the current system pressure as from 1% of the final value
of the measuring range� Display “0%” does not mean that no pressure is
applied to the system!

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4 Function
4.1 Switching function
OUT1 changes its switching state if it is above or below the set switching limits
(SP1, rP1)� The following switching functions can be selected:
• Hysteresis function / normally open: [OU1] = [Hno] (→ Fig. 1).
• Hysteresis function / normally closed: [OU1] = [Hnc] (→ Fig. 1).
First the set point (SP1) is set, then the reset point (rP1) with the requested
difference�
• Window function / normally open: [OU1] = [Fno] (→ Fig. 2).
• Window function / normally closed: [OU1] = [Fnc] (→ Fig. 2).
The width of the window can be set by means of the difference between SP1 and
rP1� SP1 = upper value, rP1 = lower value�
1 2
P = system pressure; HY = hysteresis; FE = window

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5 Installation
5.1 Installation of the sensor
Before installing and removing the unit: Make sure that no pressure is
applied to the system�
►Insert the unit in a process connection with a suitable thread�
►Tighten firmly�
Tightening Torque 1/4-18 NPT threads: 2���3 turns after finger tightened�
To ensure leak-free joints for NPT threads, sealants and lubricants
commonly used in the industry should be used�
5.2 Installation of the grounding clamp
If installed in an ungrounded pipe system (e�g� plastic pipes), the unit
must be grounded� The grounding clamp (order no� E43321) serves this
purpose� It is designed to discharge noise voltages in case the sensor is
mounted to ungrounded installations� It is available as an accessory and to
be used preferably on PN42xx series sensors�
The earthing strap and the clamping device must be in contact with the
sensor sleeve outside of the area where the type label is!
►Attach the clamping device
of the grounding clamp to the
sensor in the area beneath the
M12 connector (A)�
►Bend the earthing strap around
the sensor sleeve and insert
it in the slot of the clamping
device (B)�
AB

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►Push the earthing strap into the
clamping device until it is in close
contact with the sensor sleeve�
►Use an adequate screwdriver to tighten
the lower screw until the earthing strap
can no longer be moved on the sensor
sleeve (C)�
►Make sure that the washer is fitted on
the upper screw�
►Fasten the ground cable with the upper
screw and an adequate screwdriver to
the clamping device (D)�
C
D

8
6 Electrical connection
• The unit must be connected by a qualified electrician�
• The national and international regulations for the installation of electrical
equipment must be adhered to�
• For the output circuit, the same protective measures as for the supply
circuit must be taken� Insert a miniature fuse according to IEC60127-2
Sheet 1 (5 A fast acting)�
• The permissible potential difference between supply and output circuit is
max� 300 V�
• The equalisation of potential of metal housing parts must be ensured via
the sensor housing� Ensure an electrically conductive connection� The
grounding clamp (order no� E43321) can be used for the equalisation of
potential�
• Due to the integrated EMC filters, leakage currents of typ� < 0�5 mA can
flow via the potential equalisation to the earth potential�
• If several units are used in parallel, take into account that the leakage
currents add�
• The applicable standards must be adhered to�
Touchable surfaces of the unit are insulated to the circuits with double or
reinforced insulation according to IEC 61010-1 to overvoltage category III
and rated operating voltage 300 VAC�

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►Disconnect power�
►Connect the unit as follows:
Connector view
(at the unit)
A: Supply circuit
B: Output circuit
: Safe separation
Core colours of ifm sockets:
1 = BN (brown), 2 = BU (blue), 4 = BK (black), 5 = WH (white)

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7 Operating and display elements
1: 7-segment display
- Display of the current system pressure 1)�
- Indication of the parameters and parameter values�
2: LED red
Indication of the switching status; lights when the output is switched�
3: Set button
- Setting of the parameter values (scrolling by holding pressed; incremental by pressing
briefly)�
4: Mode/Enter button
- Selection of the parameters and acknowledgement of the parameter values�
1) PSI value in case of units with a measuring range > 999 PSI = displayed value × 10

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8 Menu
8.1 Menu structure

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8.2 Explanation of the menu
SP1/rP1 Upper / lower limit value for system pressure at which OUT1 switches�
OU1 Output function for OUT1:
Switching signal for the pressure limit values: hysteresis function [H ��] or
window function [F ��], either normally open [� no] or normally closed [� nc]�
EF Extended functions / opening of menu level 2�
HI / LO Maximum / minimum value memory for system pressure�
COF Zero-point calibration�
CAr Reset of the zero-point calibration�
dS1 / dr1 Switch-on delay / switch-off delay for OUT1�
dAP Damping for OUT1�
diS Update rate and orientation of the display�
Uni Standard unit of measurement for system pressure�
9 Parameter setting
During parameter setting, the unit remains in the operating mode� It continues
to monitor with the existing parameters until the parameter setting has been
completed�
9.1 Parameter setting in general
3 steps must be taken for each parameter setting:
1Parameter selection
►Press [Mode/Enter] until the
requested parameter is displayed.
Mode/Enter Set
2Setting of the parameter value
►Press [Set] and keep it pressed�
> Current setting value of the
parameter flashes for 5 s�
> After 5 s: Setting value is changed:
incrementally by pressing the button
once or continuously by keeping the
button pressed�
Mode/Enter Set
Numerical values are incremented continuously� To reduce the value: let the display
move to the maximum setting value� Then the cycle starts again at the minimum
setting value�

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3Acknowledgement of the parameter
value
►Briefly press [Mode/Enter]�
> The parameter is displayed again�
The new setting value is saved�
Mode/Enter Set
Setting of other parameters:
►Start again with step 1�
Finishing the parameter setting:
►[Press Mode/Enter] several times until the current measured value is displayed or
wait for 15
s� The unit returns to the operating mode if no button is pressed for 15
s after acknowledgement of the new parameter value�
• Change from menu level 1 to menu level 2:
►Press [Mode/Enter] until [EF] is
displayed�
Mode/Enter Set
►Briefly press [Set]�
> The first parameter of the submenu is
displayed (here: [HI])�
Mode/Enter Set
• Locking / unlocking
The unit can be locked electronically to prevent unintentional settings�
►Make sure that the unit is in the
normal operating mode�
►Press [Mode/Enter] + [Set] for 10 s�
> [Loc] is displayed�
During operation: > [Loc] is briefly displayed if you try to change parameter values�
For unlocking:
►Press [Mode/Enter] + [Set] for 10 s�
> [Loc] is displayed�
On delivery: not locked�
• Timeout:
If no button is pressed for 15 s during parameter setting, the unit returns to the
operating mode with unchanged values�

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9.2 Set output signals
9.2.1 Set switching limits
►Select [SP1] and set the value at which the output switches�
►Select [rP1] and set the value at which the output switches off�
rP1 is always lower than SP1� The unit only accepts values which are lower
than SP1�
9.2.2 Setting of the output function
►Select [ou1]
[Hno] = hysteresis function/normally open,
[Hnc] = hysteresis function/normally closed,
[Fno] = window function/normally open,
[Fnc] = window function / normally closed�
9.3 User settings (optional)
9.3.1 Set the unit of measurement for system pressure
►Select [Uni] and set the unit of measurement: [bAr] (= bar / mbar), [PA]
(= MPa / kPa), [inH] (= inHg), or [PSI]�
For units with a measuring range of > 999 PSI, 1/10 of the PSI value is
displayed� Consequently, the display value is to be multiplied by the factor
10�
Example: Display value = 15; real value = 15 * 10 = 150 PSI�
The unit is delivered with stickers for different units of measurement and
correction factors� Attach the corresponding sticker to the unit or mark the
sticker�
9.3.2 Configuration of the display
►Select [diS] and set the update rate and orientation of the display:
[d1]: update of the measured values every 50 ms�
[d2]: update of the measured values every 200 ms�
[d3]: update of the measured values every 600 ms�
[Ph]: display of the pressure peaks remains for a short time (peak hold)�
[rd1], [rd2], [rd3], [Ph]: display as for d1, d2, d3, Ph; rotated by 180°�
[OFF]: the display is switched off in the operating mode�

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9.3.3 Zero-point calibration
►Select [COF] and set a value between -5% and 5% of the final value of
the measuring range� The internal measured value "0" is shifted by this
value�
Zero-point calibration reset:
►Press [Mode/Enter] until [CAr] is displayed�
►Press and hold [Set] until [---] is displayed�
►Briefly press [Mode/Enter]�
9.3.4 Set delay time for OUT1
[dS1] = switch-on delay for OUT1�
[dr1] = switch-off delay for OUT1�
►Select [dS1] or [dr1] and set a value between 0�1 and 50 s (at 0�0 the
delay time is not active)�
9.3.5 Setting the damping for OUT1
►Select [dAP] and set a value between 0�01 and 4�00 s; (at 0�00 [dAP] is
not active)�
dAP value = response time between pressure change and change of the
switching status in seconds�
[dAP] influences the switching frequency: fmax = 1 ÷ 2dAP�
9.4 Service functions
9.4.1 Read min/max values for the system pressure
►Select [HI] or [LO], briefly press [Set]�
[HI] = maximum value, [LO] = minimum value�
Delete memory:
►Select [HI] or [LO]�
►Press and hold [Set] until [---] is displayed�
►Briefly press [Mode/Enter]�

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10 Operation
After power on, the unit is in the Run mode (= normal operating mode)� It carries
out its measurement and evaluation functions and provides output signals
according to the set parameters�
10.1 Operating indicators
1 Current system pressure in bar, MPa, PSI�
PSI value in case of units with a measuring range > 999 PSI = display value × 10�
2 Switching status OUT1�
10.2 Read set parameters
►Briefly press [Mode/Enter]: the parameters are displayed one after the other�
►Briefly press [Set]: the corresponding parameter value is displayed for about 15
s� After another 15 s the unit returns to the Run mode�
10.3 Error indications
[OL] Overload pressure (above measuring range)
[UL] Underload pressure (below measuring range)
11 Technical data and scale drawing
Further technical data and scale drawing at www�ifm�com�

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12 Factory setting
Factory setting User setting
SP1 25% VMR
rP1 23% VMR
OU1 Hno
COF 0.0
dS1 0.0
dr1 0.0
dAP 0.06
diS d2
Uni bAr / mbAr
MEW = final value of the measuring range
More information at www�ifm�com
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