Products Solutions Services
Operating Instructions
Cerabar PMP21
IO-Link
Process pressure measurement
Pressure transducer for safe measurement and
monitoring of absolute and gauge pressure
BA02298P/00/EN/01.23-00
71620097
2023-06-28
Cerabar PMP21 IO-Link
2 Endress+Hauser
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer Endress+Hauser
Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555
• Make sure the document is stored in a safe place such that it is always available when
working on or with the device.
• To avoid danger to individuals or the facility, read the "Basic safety instructions" section
carefully, as well as all other safety instructions in the document that are specific to
working procedures.
• The manufacturer reserves the right to modify technical data without prior notice. Your
Endress+Hauser distributor will supply you with current information and updates to this
manual.
Cerabar PMP21 IO-Link Table of contents
Endress+Hauser 3
Table of contents
1 About this document ................ 4
1.1 Purpose of this document ................. 4
1.2 Symbols .............................. 4
1.3 Documentation ........................ 5
1.4 Terms and abbreviations ................. 6
1.5 Turn down calculation ................... 6
1.6 Registered trademarks ................... 7
2 Basic safety instructions ............ 8
2.1 Requirements for the personnel ............ 8
2.2 Designated use ........................ 8
2.3 Workplace safety ....................... 9
2.4 Operational safety ...................... 9
2.5 Product safety ......................... 9
3 Product description ................ 10
3.1 Product design ........................ 10
3.2 Operating principle .................... 10
4 Incoming acceptance and product
identification ..................... 11
4.1 Incoming acceptance ................... 11
4.2 Product identification ................... 12
4.3 Storage and transport .................. 12
5 Installation ....................... 14
5.1 Mounting requirements ................. 14
5.2 Influence of the installation position ........ 14
5.3 Mounting location ..................... 14
5.4 Post-mounting check ................... 16
6 Electrical connection .............. 17
6.1 Connecting the measuring unit ............ 17
6.2 Connection data ....................... 18
6.3 Post-connection check .................. 19
7 Operation options ................. 20
7.1 IO-Link ............................. 20
8 System integration ................ 21
8.1 Process data ......................... 21
8.2 Reading out and writing device data (ISDU –
Indexed Service Data Unit) ............... 21
9 Commissioning .................... 28
9.1 Function check ....................... 28
9.2 Commissioning with an operating menu ..... 28
9.3 Configuring pressure measurement ........ 29
9.4 Performing position adjustment ........... 31
9.5 Configuring process monitoring ........... 33
9.6 Current output ........................ 33
9.7 Application examples ................... 36
10 Diagnosis and troubleshooting ..... 37
10.1 Troubleshooting ...................... 37
10.2 Diagnostic events ...................... 37
10.3 Behavior of the device in the event of a fault .. 40
10.4 Behavior of the current output in the event of
a fault .............................. 40
10.5 Resetting to factory settings (reset) ........ 41
10.6 Disposal ............................ 41
11 Maintenance ...................... 41
11.1 Exterior cleaning ...................... 41
12 Repairs ........................... 42
12.1 General notes ........................ 42
12.2 Return .............................. 42
12.3 Disposal ............................ 42
13 Overview of the operating menu ... 43
14 Description of device parameters ... 45
14.1 Identification ......................... 45
14.2 Diagnosis ........................... 46
14.3 Parameter ........................... 48
14.4 Observation ......................... 60
15 Accessories ....................... 61
15.1 Weld-in adapter ...................... 61
15.2 M12 plug-in jacks ..................... 61
Index .................................. 63
About this document Cerabar PMP21 IO-Link
4 Endress+Hauser
1 About this document
1.1 Purpose of this document
These Operating Instructions contain all the information that is required in the various
phases of the life cycle of the device: from product identification, incoming acceptance and
storage, to mounting, connection, operation and commissioning through to
troubleshooting, maintenance and disposal.
1.2 Symbols
1.2.1 Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.2.2 Electrical symbols
Protective earth (PE)
Ground terminals, which must be grounded prior to establishing any other connections.
The ground terminals are located on the inside and outside of the device.
Ground connection
Grounded clamp, which is grounded via a grounding system.
1.2.3 Tool symbols
Open-ended wrench
1.2.4 Symbols for certain types of Information
Permitted
Procedures, processes or actions that are permitted.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information
Reference to documentation
1.
,
2.
,
3.
Series of steps
Cerabar PMP21 IO-Link About this document
Endress+Hauser 5
Reference to page:
Result of an individual step:
1.2.5 Symbols in graphics
A, B, C ... View
1, 2, 3 ... Item numbers
1.
,
2.
,
3.
Series of steps
1.3 Documentation
The following types of documentation are available in the Download Area of the Endress
+Hauser website (www.endress.com/downloads):
For an overview of the scope of the associated Technical Documentation, refer to the
following:
•Device Viewer (www.endress.com/deviceviewer): Enter the serial number from the
nameplate
•Endress+Hauser Operations app: Enter serial number from nameplate or scan
matrix code on nameplate.
1.3.1 Technical Information (TI)
Planning aid
The document contains all the technical data on the device and provides an overview of
the accessories and other products that can be ordered for the device.
1.3.2 Brief Operating Instructions (KA)
Guide that takes you quickly to the 1st measured value
The Brief Operating Instructions contain all the essential information from incoming
acceptance to initial commissioning.
1.3.3 Safety Instructions (XA)
Depending on the approval, the following Safety Instructions (XA) are supplied with the
device. They are an integral part of the Operating Instructions.
The nameplate indicates the Safety Instructions (XA) that are relevant to the device.
1.3.4 Functional Safety Manual (FY)
Depending on the SIL approval, the Functional Safety Manual (FY) is an integral part of
the Operating Instructions and applies in addition to the Operating Instructions, Technical
Information and ATEX Safety Instructions.
The different requirements that apply for the protective function are described in the
Functional Safety Manual (FY).
About this document Cerabar PMP21 IO-Link
6 Endress+Hauser
1.4 Terms and abbreviations
URL OPLMWP
LRL
0
p
LRV URV
1
2
3
4
A0029505
1 OPL: The OPL (over pressure limit = sensor overload limit) for the measuring device depends on the lowest-
rated element, with regard to pressure, of the selected components, i.e. the process connection has to be taken
into consideration in addition to the measuring cell. Observe pressure-temperature dependency. The OPL may
only be applied for a short period of time.
2 MWP: The MWP (maximum working pressure) for the sensors depends on the lowest-rated element, with
regard to pressure, of the selected components, i.e. the process connection has to be taken into consideration
in addition to the measuring cell. Observe pressure-temperature dependency. The maximum working pressure
may be applied at the device for an unlimited period. The MWP can be found on the nameplate.
3 The maximum sensor measuring range corresponds to the span between the LRL and URL. This sensor
measuring range is equivalent to the maximum calibratable/adjustable span.
4 The calibrated/adjusted span corresponds to the span between the LRV and URV. Factory setting: 0 to URL.
Other calibrated spans can be ordered as customized spans.
p Pressure
LRL Lower range limit
URL Upper range limit
LRV Lower range value
URV Upper range value
TD Turn down Example - see the following section.
The turn down is preset in the factory and can be changed.
1.5 Turn down calculation
LRV URLURV
LRL
1 = 2 3
A0029545
1 Calibrated/adjusted span
2 Zero point-based span
3 Upper range limit
Cerabar PMP21 IO-Link About this document
Endress+Hauser 7
Example
• Sensor: 10 bar (150 psi)
• Upper range limit (URL) = 10 bar (150 psi)
Turn down (TD):
• Calibrated/adjusted span: 0 to 5 bar (0 to 75 psi)
• Lower range value (LRV) = 0 bar (0 psi)
• Upper range value (URV) = 5 bar (75 psi)
TD = URL
|URV - LRV|
TD = 10 bar (150 psi) = 2
|5 bar (75 psi) - 0 bar (0 psi)|
In this example, the TD is 2:1.
This span is based on the zero point.
1.6 Registered trademarks
is a registered trademark of the IO-Link Consortium.
Basic safety instructions Cerabar PMP21 IO-Link
8 Endress+Hauser
2 Basic safety instructions
2.1 Requirements for the personnel
The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:
‣Trained, qualified specialists must have a relevant qualification for this specific function
and task.
‣Are authorized by the plant owner/operator.
‣Are familiar with federal/national regulations.
‣Before starting work, read and understand the instructions in the manual and
supplementary documentation as well as the certificates (depending on the
application).
‣Follow instructions and comply with basic conditions.
The operating personnel must fulfill the following requirements:
‣Are instructed and authorized according to the requirements of the task by the facility's
owner-operator.
‣Follow the instructions in this manual.
2.2 Designated use
2.2.1 Application and media
The device is used to measure absolute and gauge pressure in gases, vapors and liquids.
The process-wetted materials of the measuring device must have an adequate level of
resistance to the media.
The measuring device may be used for the following measurements (process variables)
• in compliance with the limit values specified under "Technical data"
• in compliance with the conditions listed in this manual.
Measured process variable
Gauge pressure or absolute pressure
Calculated process variable
Pressure
2.2.2 Incorrect use
The manufacturer is not liable for damage caused by using the device incorrectly or for
purposes for which it was not intended.
Verification for borderline cases:
‣For special fluids and fluids for cleaning, Endress+Hauser is glad to provide assistance
in verifying the corrosion resistance of process-wetted materials, but does not accept
any warranty or liability.
2.2.3 Residual risks
When in operation, the housing may reach a temperature close to the process
temperature.
Danger of burns from contact with surfaces!
‣For elevated process temperatures, ensure protection against contact to prevent burns.
Cerabar PMP21 IO-Link Basic safety instructions
Endress+Hauser 9
2.3 Workplace safety
When working on and with the device:
‣Wear the required personal protective equipment as per national regulations.
‣Switch off the supply voltage before connecting the device.
2.4 Operational safety
Risk of injury!
‣Operate the device only if it is in proper technical condition, free from errors and faults.
‣The operator is responsible for ensuring trouble-free operation of the device.
Modifications to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers:
‣If modifications are nevertheless required, consult with Endress+Hauser.
Hazardous area
To eliminate danger to persons or the facility when the device is used in the hazardous
area (e.g., pressure equipment safety):
‣Check the nameplate to verify if the device ordered can be put to its intended use in the
hazardous area.
2.5 Product safety
This device is designed in accordance with good engineering practice to meet state-of-the-
art safety requirements, has been tested, and left the factory in a condition in which it is
safe to operate.
It meets general safety standards and legal requirements. It also complies with the EC
directives listed in the device-specific EC Declaration of Conformity. Endress+Hauser
confirms this by affixing the CE mark to the device.
Product description Cerabar PMP21 IO-Link
10 Endress+Hauser
3 Product description
3.1 Product design
Overview Item Description
C - 1
A0021987
C- 1 M12 plug
Housing cap made of plastic
D
E
A0027215
D
E
Housing
Process connection (sample illustration)
3.2 Operating principle
3.2.1 Calculating the pressure
Devices with metallic process isolating diaphragm
The process pressure deflects the metal process isolating diaphragm of the sensor and a fill
fluid transfers the pressure to a Wheatstone bridge (semiconductor technology). The
pressure-dependent change in the bridge output voltage is measured and evaluated.
Cerabar PMP21 IO-Link Incoming acceptance and product identification
Endress+Hauser 11
4 Incoming acceptance and product
identification
4.1 Incoming acceptance
A0028673
DELIVERY NOTE
1 = 2
A0016870
Is the order code on the delivery note (1) identical to the order code on
the product sticker (2)?
A0053062
A0028673
A0053066
Are the goods undamaged?
A0028673
DELIVERY NOTE
A0053067
Do the data on the nameplate correspond to the order specifications and
the delivery note?
If one of these conditions does not apply, please contact your
Endress+Hauser sales office.
Incoming acceptance and product identification Cerabar PMP21 IO-Link
12 Endress+Hauser
4.2 Product identification
The measuring device can be identified in the following ways:
• Nameplate specifications
• Order code with breakdown of the device features on the delivery note
• Enter the serial numbers from the nameplates in W@M Device Viewer
(www.endress.com/deviceviewer): all the information about the device is displayed.
For an overview of the scope of the associated Technical Documentation, refer to the
following:
•Device Viewer (www.endress.com/deviceviewer): Enter the serial number from the
nameplate
•Endress+Hauser Operations app: Enter serial number from nameplate or scan
matrix code on nameplate.
4.2.1 Manufacturer address
Endress+Hauser SE+Co. KG
Hauptstraße 1
79689 Maulburg, Germany
Place of manufacture: See nameplate.
4.2.2 Nameplate
Ser. no.:
Ord. cd.:
Ext. ord. cd.:
D-79689 Maulburg
Made in Germany,
Cerabar
5
1
2
3
4
Date:
TAG:
A0024456
1 Manufacturer's address
2 Device name
3 Order number
4 Serial number
5 Extended order number
4.3 Storage and transport
4.3.1 Storage conditions
Use original packaging.
Store the measuring device in clean and dry conditions and protect from damage caused by
shocks (EN 837-2).
Storage temperature range
–40 to +85 °C (–40 to +185 °F)
Cerabar PMP21 IO-Link Incoming acceptance and product identification
Endress+Hauser 13
4.3.2 Transporting the product to the measuring point
LWARNING
Incorrect transport!
Housing and membrane may become damaged, and there is a risk of injury.
‣Transport the measuring device to the measuring point in its original packaging or by
the process connection.
Installation Cerabar PMP21 IO-Link
14 Endress+Hauser
5 Installation
5.1 Mounting requirements
• Moisture must not penetrate the housing when the device is being mounted, the
electrical connection is being set up or during operation.
• Do not clean or touch process isolating diaphragms with hard and/or pointed objects.
• Do not remove the protection on the process membrane until just before installation.
• Always tighten the cable entry firmly.
• Point the cable and plug downwards where possible to prevent moisture from entering
(e.g. rain or condensation water).
• Protect the housing against impact.
• For devices with gauge pressure sensor, the following applies:
NOTICE
If a heated device is cooled during a cleaning process (e.g. by cold water), a vacuum
develops for a short time and, as a result, moisture can enter the sensor through the
pressure compensation element (1).
Device could be destroyed!
‣In the event of this happening, mount the device in such a way that the pressure
compensation element (1) is pointing downwards at an angle or to the side, if possible.
1
1
1
1
A0022252
5.2 Influence of the installation position
Any orientation is possible. However, the orientation may cause a zero point shift, i.e. the
measured value does not show zero when the vessel is empty or partially full.
C
AB
A0024708
Process membrane axis is
horizontal (A)
Process membrane pointing
upwards (B)
Process membrane pointing
downwards (C)
Calibration position, no effect Up to +4 mbar (+0.058 psi) Up to –4 mbar (–0.058 psi)
5.3 Mounting location
5.3.1 Pressure measurement
Pressure measurement in gases
Mount the device with the shutoff device above the tapping point to allow any condensate
to flow into the process.
Cerabar PMP21 IO-Link Installation
Endress+Hauser 15
1
2
A0021904
1 Device
2 Shutoff device
Pressure measurement in vapors
For pressure measurement in vapors, use a siphon. The siphon reduces the temperature to
almost ambient temperature. Mount the device with the shutoff device at the same level
as the tapping point.
Advantage:
only minor/negligible heat effects on the device.
Note the max. permitted ambient temperature of the transmitter!
1
2
3
A0024395
1 Device
2 Shutoff device
3 Siphon
Pressure measurement in liquids
Mount the device with the shutoff device at the same level as or below the tapping point.
1
2
A0024399
1 Device
2 Shutoff device
5.3.2 Level measurement
• Always install the device below the lowest measuring point.
• Do not install the device at the following positions:
• In the filling curtain
• In the tank outlet
• In the suction area of a pump
• At a point in the tank which could be affected by pressure pulses from the agitator
Installation Cerabar PMP21 IO-Link
16 Endress+Hauser
A0024405
5.4 Post-mounting check
• Is the device undamaged (visual inspection)?
• Does the device comply with the measuring point specifications? For example:
• Process temperature
• Process pressure
• Ambient temperature
• Measurement range
• Are the measuring point identification and labeling correct (visual inspection)?
• Is the device adequately protected from precipitation and direct sunlight?
• Are the securing screws firmly tightened?
• Does the pressure compensation element point downwards at an angle or to the side?
• To prevent moisture from penetrating, ensure that the connecting cables/plugs are
pointing downwards.
Cerabar PMP21 IO-Link Electrical connection
Endress+Hauser 17
6 Electrical connection
6.1 Connecting the measuring unit
6.1.1 Terminal assignment
LWARNING
Risk of injury from the uncontrolled activation of processes!
‣Switch off the supply voltage before connecting the device.
‣Make sure that downstream processes are not started unintentionally.
LWARNING
An incorrect connection compromises electrical safety!
‣In accordance with IEC/EN 61010, a suitable circuit breaker must be provided for the
device.
‣Non-hazardous area: To meet device safety specifications according to the IEC/EN
61010 standard, the installation must ensure that the maximum current is limited to
500 mA.
‣Protective circuits against reverse polarity are integrated.
NOTICE
Damage to analog input of PLC resulting from incorrect connection
‣Do not connect the active PNP switch output of the device to the 4 to 20 mA input of a
PLC.
Connect the device in the following order:
1. Check whether the supply voltage matches the supply voltage indicated on the
nameplate.
2. Connect the device as indicated in the following diagram.
Switch on the supply voltage.
C/Q
L–
L+
21
34SIO
IO-Link
A0034006
1 M12 plug
1 Supply voltage +
2 4-20 mA
3 Supply voltage -
4 C/Q (IO-Link communication or SIO mode)
6.1.2 Supply voltage
Electronic version Supply voltage
IO-Link 10 to 30 VDC
IO-Link communication is guaranteed only if the supply voltage is at least 18 V.
Electrical connection Cerabar PMP21 IO-Link
18 Endress+Hauser
6.1.3 Current consumption and alarm signal
Electronic version Current consumption Alarm signal 1)
IO-Link Maximum current consumption: ≤ 300 mA
1) For MAX alarm (factory setting)
6.2 Connection data
6.2.1 Switching capacity
• Switch status ON: Ia ≤ 200 mA 1) 2); Switch status OFF: Ia ≤1 mA
• Switch cycles: >10,000,000
• Voltage drop PNP: ≤2 V
• Overload protection: Automatic load testing of switching current;
• Max. capacitance load: 1 μF at max. supply voltage (without resistive load)
• Max. cycle duration: 0.5 s; min. ton: 40 μs
• Periodic disconnection from protective circuit in the event of overcurrent (f = 2 Hz) and
"F804" displayed
6.2.2 Load (for 4 to 20 mA devices )
In order to guarantee sufficient terminal voltage, a maximum load resistance RL (including
line resistance) must not be exceeded depending on the supply voltage UB of the supply
unit.
[ ]W
20 30
10
0
1022
587
152
U
[V]
1
2
R
R
L
L
max
max
£-U 6.5V
23mA
B
B
A0031107
1 Power supply 10 to 30 VDC
2 RLmax Maximum load resistance
UBSupply voltage
If load is too great:
• Failure current is indicated and "S803" displayed (indication: MIN alarm current)
• Periodic checking to establish if it is possible to quit fault state
• In order to guarantee sufficient terminal voltage, a maximum load resistance RL
(including line resistance) must not be exceeded depending on the supply voltage UB of
the supply unit.
1) For the switch output 1 x PNP + 4 to 20 mA output 100 mA can be guaranteed over the entire temperature range. For lower ambient
temperatures, higher currents are possible but cannot be guaranteed. Typical value at 20 °C (68 °F) approx. 200 mA. For the switch output "1 x
PNP", 200 mA can be guaranteed over the entire temperature range.
2) Larger currents are supported, thus deviating from the IO-Link standard.
Cerabar PMP21 IO-Link Electrical connection
Endress+Hauser 19
6.3 Post-connection check
• Is the device or cable undamaged (visual check)?
• Do the cables used comply with the requirements?
• Are the mounted cables relieved of tension?
• Are all cable glands installed, securely tightened and leak-tight?
• Does the supply voltage match the specifications on the nameplate?
• Is the terminal assignment correct ?
• If required: has protective ground connection been established?
Operation options Cerabar PMP21 IO-Link
20 Endress+Hauser
7 Operation options
7.1 IO-Link
7.1.1 IO-Link information
IO-Link is a point-to-point connection for communication between the measuring device
and an IO-Link master. The measuring device features an IO-Link communication interface
type 2 with a second IO function on pin 4. This requires an IO-Link-compatible assembly
(IO-Link master) for operation. The IO-Link communication interface enables direct access
to the process and diagnostic data. It also provides the option of configuring the measuring
device while in operation.
Physical layer, the measuring device supports the following features:
• IO-Link specification: Version 1.1
• IO-Link Smart Sensor Profile 2nd Edition
• SIO mode: Yes
• Speed: COM2; 38.4 kBaud
• Minimum cycle time: 2.5 msec.
• Process data width: 48 bits (Float32+14-bit vendor-spec. + 2 bits SSC)
• IO-Link data storage: Yes
• Block configuration: Yes
7.1.2 IO-Link download
http://www.endress.com/download
• Select "Software" as the media type.
• Select "Device Driver" as the software type.
Select IO-Link (IODD).
• In the "Text Search" field enter the device name.
https://ioddfinder.io-link.com/
Search by
• Manufacturer
• Article number
• Product type
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