Endress+Hauser Cerabar PMC51B Technical specifications

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Brief Operating Instructions
Cerabar PMC51B
Process pressure measurement
HART
These Instructions are Brief Operating Instructions; they are
not a substitute for the Operating Instructions pertaining to
the device.
Detailed information about the device can be found in the
Operating Instructions and the other documentation:
Available for all device versions via:
• Internet: www.endress.com/deviceviewer
• Smart phone/tablet: Endress+Hauser Operations App
KA01469P/00/EN/04.22-00
71582834
2022-08-31

Associated documentation Cerabar PMC51B HART
2 Endress+Hauser
1 Associated documentation
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
2 About this document
2.1 Document function
The Brief Operating Instructions contain all the essential information from incoming
acceptance to initial commissioning.
2.2 Symbols
2.2.1 Safety symbols
DANGER

Cerabar PMC51B HART About this document
Endress+Hauser 3
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.
2.2.2 Electrical symbols
Ground connection:
Terminal for connection to the grounding system.
2.2.3 Symbols for certain types of information
Permitted:
Procedures, processes or actions that are permitted.
Forbidden:
Procedures, processes or actions that are forbidden.
Additional information:
Reference to documentation:
Reference to page:
Series of steps:
1.
,
2.
,
3.
Result of an individual step:
2.2.4 Symbols in graphics
Item numbers: 1, 2, 3 ...
Series of steps:
1.
,
2.
,
3.
Views: A, B, C, ...
2.2.5 Symbols on the device
Safety instructions:
Observe the safety instructions contained in the associated Operating Instructions.

Basic safety instructions Cerabar PMC51B HART
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2.2.6 Communication symbols
2.3 Registered trademarks
HART®
Registered trademark of the FieldComm Group, Austin, Texas, USA
Bluetooth®
The Bluetooth® wordmark and logos are registered trademarks of Bluetooth SIG, Inc. and any
use of these trademarks by Endress+Hauser is licensed. Other trademarks and trade names
are those of their respective owners.
Apple®
Apple, the Apple logo, iPhone, and iPod touch are trademarks of Apple Inc., registered in the
U.S. and other countries. App Store is a service mark of Apple Inc.
Android®
Android, Google Play and the Google Play logo are trademarks of Google Inc.
KALREZ®
Registered trademark of DuPont Performance Elastomers L.L.C., Wilmington, USA
3 Basic safety instructions
3.1 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 beginning work, the specialist staff must have read and understood the instructions
in the Operating Instructions and supplementary documentation as well as in the
certificates (depending on the application)
‣Follow instructions and comply with conditions
The operating personnel must fulfill the following requirements:
‣Being instructed and authorized according to the requirements of the task by the facility's
owner-operator
‣Following the instructions in these Operating Instructions
3.2 Intended use
The Cerabar is a pressure transmitter for measuring level and pressure.
3.2.1 Incorrect use
The manufacturer is not liable for damage caused by improper or non-intended use.

Cerabar PMC51B HART Basic safety instructions
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Verification for borderline cases:
‣For special fluids and fluids for cleaning, Endress+Hauser is glad to provide assistance in
verifying the corrosion resistance of fluid-wetted materials, but does not accept any
warranty or liability.
3.3 Workplace safety
When working on and with the device:
‣Wear the required personal protective equipment according to federal/national
regulations.
‣Switch off the supply voltage before connecting the device.
3.4 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 the interference-free operation of the device.
Modifications to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers:
‣If, despite this, modifications are required, consult with Endress+Hauser.
Repair
To ensure continued operational safety and reliability:
‣Carry out repairs on the device only if they are expressly permitted.
‣Observe federal/national regulations pertaining to the repair of an electrical device.
‣Use original spare parts and accessories from Endress+Hauser only.
Hazardous area
To eliminate the risk of danger to persons or the facility when the device is used in the
approval-related area (e.g. explosion protection, pressure equipment safety):
‣Check the nameplate to verify if the device ordered can be put to its intended use in the
approval-related area.
‣Observe the specifications in the separate supplementary documentation that is an integral
part of these Instructions.
3.5 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.

Incoming acceptance and product identification Cerabar PMC51B HART
6 Endress+Hauser
3.6 Functional Safety SIL (optional)
The Functional Safety Manual must be strictly observed for devices that are used in functional
safety applications.
3.7 IT security
Endress+Hauser can only provide a warranty if the device is installed and used as described in
the Operating Instructions. The device is equipped with security mechanisms to protect it
against any inadvertent changes to the device settings. IT security measures in line with
operators' security standards and designed to provide additional protection for the device and
device data transfer must be implemented by the operators themselves.
3.8 Device-specific IT security
The device offers specific functions to support protective measures by the operator. These
functions can be configured by the user and guarantee greater in-operation safety if used
correctly. An overview of the most important functions is provided in the following section:
• Write protection via hardware write protection switch
• Access code to change the user role (applies for operation via Bluetooth, FieldCare,
DeviceCare, Asset Management Tools (e.g. AMS, PDM)
4 Incoming acceptance and product identification
4.1 Incoming acceptance
DELIVERY NOTE
1 = 2
A0016870
• Is the order code on the delivery note (1) identical to the order code on the product sticker
(2)?
• Are the goods undamaged?
• Do the data on the nameplate correspond to the order specifications and the delivery note?
• Is the documentation available?
• If required (see nameplate): are the Safety Instructions (XA) provided?
If you can answer "no" to any of these questions, please contact Endress+Hauser.

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4.2 Storage and transport
4.2.1 Storage conditions
• Use the original packaging
• Store the device in clean and dry conditions and protect from damage caused by shocks
Storage temperature range
See Technical Information.
4.2.2 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 device to the measuring point in the original packaging.
5 Mounting
5.1 Mounting requirements
5.1.1 General instructions
• Do not clean or touch the membrane with hard and/or pointed objects.
• Do not remove the protection on the membrane until just before installation.
Always firmly tighten the housing cover and the cable entries.
1. Counter-tighten the cable entries.
2. Tighten the coupling nut.
5.1.2 Installation instructions
• The devices are mounted according to the same guidelines as pressure gauges (DIN
EN837-2)
• To ensure optimal readability of the local display, adjust the housing and local display
• Endress+Hauser offers a mounting bracket to mount the device on pipes or walls
• Use flushing rings for flanges if there is a risk of medium buildup or clogging at the process
connection
• The flushing ring is clamped between the process connection and process
• Material buildup in front of the membrane is flushed away, and the pressure chamber is
vented, via the two lateral flushing holes
• When measuring in media containing solids (e.g. dirty liquids), installing separators and
drain valves is useful for capturing and removing sediment

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• Using a valve manifold allows for easy commissioning, installation and maintenance
without interrupting the process
• When mounting the device, establishing the electrical connection and during operation:
prevent the penetration of moisture into the housing
• Point the cable and plug downwards as much as possible to prevent moisture from entering
(e.g. rainwater or condensation)
5.1.3 Installation instructions for thread
• Device with G 1 ½" thread:
Place the flat seal on the sealing surface of the process connection
Avoid additional strain on the membrane: do not seal the thread with hemp or similar
materials
• Device with NPT thread:
• Wrap Teflon tape around the thread to seal it
• Tighten the device at the hexagon bolt only; do not turn it by the housing
• When screwing in, do not overtighten the thread; tighten the NPT thread to the required
depth according to the standard
• For the following process connections, a tightening torque of max. 40 Nm (29.50 lbf ft) is
specified:
• Thread ISO228 G ½" with flush membrane
• Thread DIN13 M20 x 1.5 with flush membrane
• NPT 3/4" with flush membrane
Mounting devices with PVDF thread
LWARNING
Risk of damage to process connection!
Risk of injury!
‣Devices with a PVDF thread must be installed with the mounting bracket provided!
‣PVDF is only intended for metal-free applications!
LWARNING
Material fatigue from pressure and temperature!
Risk of injury if parts burst! The thread can become loose if exposed to high pressure and
temperature loads.
‣Check the leak-tight integrity of the thread regularly.
‣Use Teflon tape to seal the ½" NPT thread.
5.1.4 Orientation
NOTICE
Damage to the device!
If a heated device is cooled during a cleaning process (e.g. by cold water), a vacuum develops
for a short time. As a result of this, moisture can enter the measuring cell via the pressure
compensation element (1).
‣Mount the device as follows.

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1
1
11
A0038723
• Keep the pressure compensation element (1) free from contamination
• A position-dependent zero point shift (when the vessel is empty the measured value does
not display zero) can be corrected
• The use of shutoff devices and/or water pocket pipes is recommended for mounting
• The orientation depends on the measuring application
5.2 Mounting the device
5.2.1 Pressure measurement in gases
Mount the device with the shutoff device above the tapping point so that any condensate can
flow into the process.
5.2.2 Pressure measurement in vapors
A water pocket pipe reduces the temperature to almost the ambient temperature. The defined
water column only causes minimal (negligible) measured errors and minimal (negligible)
thermal effects on the device.
Observe the maximum permitted ambient temperature of the transmitter!
• Ideally, mount the device with the O-shaped water pocket pipe below the tapping point
The device may also be mounted above the tapping point
• Fill the water pocket pipe with liquid before commissioning
5.2.3 Pressure measurement in liquids
Mount the device with the shutoff device below or at the same level as the tapping point.

Electrical connection Cerabar PMC51B HART
10 Endress+Hauser
5.2.4 Level measurement
• Always mount 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
• Mount the device downstream from a shutoff device: the calibration and function check can
be carried out more easily
5.2.5 Closing the housing cover
NOTICE
Thread and housing cover damaged from dirt and fouling!
‣Remove fouling (e.g. sand.) on the thread of the cover and housing.
‣If you continue to encounter resistance when closing the cover, check the thread again for
fouling.
Housing thread
The thread of the electronics and connection compartment is coated with lubricant
varnish.
Avoid additional lubrication.
6 Electrical connection
6.1 Connecting requirements
6.1.1 Potential equalization
The protective ground on the device must not be connected. If necessary, the potential
matching line can be connected to the outer ground terminal of the device before the device is
connected.
1
A0045411
1 Ground terminal for connecting the potential matching line

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LWARNING
Explosion Hazard!
‣Please refer to the separate documentation on applications in hazardous areas for the
safety instructions.
For optimum electromagnetic compatibility:
• Keep the potential matching line as short as possible
• Maintain a cross-section of at least 2.5 mm2 (14 AWG)
6.2 Connecting the device
1
A0043806
1 Connection compartment cover
Housing thread
The thread of the electronics and connection compartment is coated with lubricant
varnish.
Avoid additional lubrication.
6.2.1 Supply voltage
• Ex d, Ex e, non-Ex: supply voltage: 10.5 to 35 VDC
• Ex i: supply voltage: 10.5 to 30 VDC
• Nominal current: 4 to 20 mA HART
The power unit must be tested to ensure it meets safety requirements (e.g., PELV, SELV,
Class 2) and must comply with the relevant protocol specifications. The requirements for
4 to 20 mA are the same as those for HART.
Depending on the supply voltage and the current consumption, Bluetooth can optionally be
switched on or off. For the dependency, see the diagram:

Electrical connection Cerabar PMC51B HART
12 Endress+Hauser
10.5
11.0
12.5
13.5
14.5
15.5
16.5
17.5
18.5
ILOOP
U
3.6 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4
A
B
A0047149
A Bluetooth can be switched on
B Bluetooth cannot be switched on
6.2.2 Terminals
• Supply voltage and internal ground terminal: 0.5 to 2.5 mm2 (20 to 14 AWG)
• External ground terminal: 0.5 to 4 mm2 (20 to 12 AWG)
6.2.3 Cable specification
• Protective ground or grounding of the cable shield: rated cross-section > 1 mm2 (17 AWG)
Rated cross-section of 0.5 mm2 (20 AWG) to 2.5 mm2 (13 AWG)
• Cable outer diameter: Ø5 to 12 mm (0.2 to 0.47 in) depends on the cable gland used (see
Technical Information)

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6.2.4 4-20 mA HART
2
3
4
Y+ +
- -
I
1
mA
A0028908
 1 Block diagram of HART connection
1 Device with HART communication
2 HART communication resistor
3 Power supply
4 Multimeter
The HART communication resistor of 250 Ω in the signal line is always necessary in the
case of a low-impedance power supply.
Take the voltage drop into consideration:
Maximum 6 V with a communication resistor of 250 Ω
6.2.5 Overvoltage protection
Devices without optional overvoltage protection
Equipment from Endress+Hauser fulfills the requirements of the product standard IEC / DIN
EN 61326-1 (Table 2 Industrial Environment).
Depending on the type of port (DC power supply, input/output port) different testing levels
according to IEC / DIN EN 61326-1 against transient overvoltages (Surge) are applied (IEC /
DIN EN 61000-4-5 Surge):
Test level on DC power ports and input / output ports is 1000 V line to earth
Overvoltage category
Overvoltage category II

Electrical connection Cerabar PMC51B HART
14 Endress+Hauser
6.2.6 Wiring
LWARNING
Supply voltage might be connected!
Risk of electric shock and/or explosion!
‣If the device is used in hazardous areas, comply with national standards and the
specifications in the Safety Instructions (XAs). Use the specified cable gland.
‣The supply voltage must match the specifications on the nameplate.
‣Switch off the supply voltage before connecting the device.
‣If necessary, the potential matching line can be connected to the outer ground terminal of
the transmitter before the device is connected.
‣A suitable circuit breaker should be provided for the device in accordance with IEC/EN
61010.
‣The cables must be adequately insulated, with due consideration given to the supply
voltage and the overvoltage category.
‣The connecting cables must offer adequate temperature stability, with due consideration
given to the ambient temperature.
‣Only operate the device with the covers closed.
Connect the device in the following order:
1. Release the cover lock (if provided).
2. Unscrew the cover.
3. Guide the cables into the cable glands or cable entries.
4. Connect the cable.
5. Tighten the cable glands or cable entries so that they are leak-tight. Counter-tighten the
housing entry. Use a suitable tool with width across flats AF24/25 8 Nm (5.9 lbf ft) for
the M20 cable gland.
6. Screw the cover securely back onto the connection compartment.
7. If fitted: tighten the screw of the cover lock using the Allen key 0.7 Nm (0.52 lbf ft)
±0.2 Nm (0.15 lbf ft).

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6.2.7 Terminal assignment
Single compartment housing
+
-
1
2
3
A0042594
 2 Connection terminals and ground terminal in the connection compartment
1 Positive terminal
2 Negative terminal
3 Internal ground terminal
6.2.8 Cable entries
12
A0045413
1 Cable entry
2 Dummy plug
The type of cable entry depends on the device version ordered.
Always route connecting cables downwards so that moisture cannot penetrate the
connection compartment.
If necessary, create a drip loop or use a weather protection cover.

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6.2.9 Available device plugs
In the case of devices with a plug, it is not necessary to open the housing for connection
purposes.
Use the enclosed seals to prevent the penetration of moisture into the device.
Devices with valve plug
+
2 1
–
+
A B
BU BN GNYE
2
1
3
+
–
–
A0023097
 3 BN = brown, BU = blue, GNYE = green/yellow
A Electrical connection for devices with valve connector
B View of the plug-in connection on the device
Devices with a Harting plug Han7D
Han7D
–
+
+ –
–
+
A B
1
5
4
678
2
3
A0041011
A Electrical connection for devices with Harting plug Han7D
B View of the plug-in connection on the device
- Brown
 Green/yellow
+ Blue

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6.3 Ensuring the degree of protection
6.3.1 Cable entries
• Gland M20, plastic, IP66/68 TYPE 4X/6P
• Gland M20, brass nickel plated, IP66/68 TYPE 4X/6P
• Gland M20, 316L, IP66/68 TYPE 4X/6P
• Thread M20, IP66/68 TYPE 4X/6P
• Thread G1/2, IP66/68 TYPE 4X/6P
If the G1/2 thread is selected, the device is delivered with an M20 thread as standard and a
G1/2 adapter is included with the delivery, along with the corresponding documentation
• Thread NPT1/2, IP66/68 TYPE 4X/6P
• Dummy plug transport protection: IP22, TYPE 2
• *Cable 5 m, IP66/68 TYPE 4X/6P pressure compensation via cable
• *Valve plug ISO4400 M16, IP65 TYPE 4X
• HAN7D plug, 90 degrees, IP65 NEMA Type 4X
• M12 plug
When housing is closed and connecting cable is plugged in: IP66/67, NEMA Type 4X
When housing is open or connecting cable is not plugged in: IP20, NEMA Type 1
NOTICE
M12 plug and HAN7D plug: incorrect mounting can invalidate the IP protection class!
‣The degree of protection only applies if the connecting cable used is plugged in and
screwed tight.
‣The degree of protection only applies if the connecting cable used is specified according to
IP67, NEMA Type 4X.
‣The IP protection classes are only maintained if the dummy cap is used or the cable is
connected.

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18 Endress+Hauser
7 Operation options
7.1 Operating keys and DIP switches on the electronic insert
1
2
Alarm
on
off
MaxSW
Zero/I
Span/II
Display
34
A0039285
1 Operating key for lower range value (Zero)
2 Operating key for upper range value (Span)
3 DIP switch for alarm current
4 DIP switch for locking and unlocking the device
The setting of the DIP switches has priority over the settings made via other operation
methods (e.g. FieldCare/DeviceCare).
7.2 Access to the operating menu via the local display
7.2.1 Device display (optional)
Functions:
Display of measured values and fault and notice messages
The device displays are available with the additional option of Bluetooth® wireless
technology.
Depending on the supply voltage and the current consumption, Bluetooth can optionally
be switched on or off.

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1
4 5 67
2
3
A0043599
 4 Segment display
1 Measured value
2 Bar graph proportional to the current output
3 Unit of measured value
4 Locked (symbol appears when the device is locked)
5 Bluetooth (symbol flashes if Bluetooth connection is active)
6 HART communication (symbol is displayed if HART communication is active)
7 Measured value output in %
8 Commissioning
8.1 Preliminaries
The measuring range and the unit in which the measured value is transmitted correspond to
the data on the nameplate.
LWARNING
The settings of the current output are relevant for safety!
This situation can result in product overflow.
‣The setting of the current output depends on the setting in the Assign PV parameter.
‣After changing the Assign PV parameter, check the settings for the range (LRV and URV)
and reconfigure them if necessary.
LWARNING
Process pressure above or below permitted maximum/minimum!
Risk of injury if parts burst! Warnings are displayed if the pressure is too high.
‣If a pressure smaller than the minimum permitted pressure or greater than the maximum
permitted pressure is present at the device, a message is output.
‣Only use the device within the measuring range limits!
8.1.1 As-delivered state
If no customized settings were ordered:

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•Assign PV parameter Pressure option
• Calibration values defined by defined measuring cell nominal value
• The alarm current is set to min. (3.6 mA), (only if no other option was selected when
ordering)
• DIP switch to Off position
• If Bluetooth is ordered, then Bluetooth is switched on
8.2 Function check
Perform a function check before putting the measuring point into operation:
• "Post-installation check" checklist (see the "Installation" section)
• "Post-connection check" checklist (see the "Electrical connection" section)
8.3 Switching on the device
All configuration tools offer a commissioning wizard that helps the user to configure the
most important configuration parameters (Guidance menu Commissioning wizard).
8.4 Setting the operating language
8.4.1 Operating tool
See the description of the operating tool.
8.5 Configuring the measuring device
8.5.1 Commissioning with keys on the electronic insert
The following functions are possible via the keys on the electronic insert:
• Position adjustment (zero point correction)
The orientation of the device may cause a pressure shift
This pressure shift can be corrected by a position adjustment
• Setting the lower range value and upper range value
The pressure applied must be within the nominal pressure limits of the sensor (see the
specifications on the nameplate)
• Resetting the device
Carrying out position adjustment
1. Device installed in desired position and no pressure applied.
2. Press the "Zero" and "Span" keys simultaneously for at least 3 s.
3. When the LED lights up briefly, the pressure present has been accepted for position
adjustment.
Setting the lower range value (pressure or scaled variable)
1. The desired pressure for the lower range value is present at the device.
2. Press the "Zero" key for at least 3 s.