Endress+Hauser CM444, CM442 Specifications

TI00444C/07/EN/21.18 71407298 2018-06-13

Products Solutions Services

Technical Information

Liquiline CM442/CM444/CM448

Multiparameter transmitter with a maximum of eight measuring channels based on digital Memosens technology

For monitoring and controlling processes in industry and the environmental sector

Application

• Water and wastewater

• Power stations

• Chemical industry

• Other industrial applications

Your benefits

• Highly flexible: – Able to connect up to 8 Memosens sensors – Mathematics functions calculate new measured values – Digital fieldbuses (HART, PROFIBUS, Modbus,

Ethernet/IP) and integrated web server

– Choice of cleaning function, controller and alarm relay

– Optional digital or analog inputs/outputs

• Maximum process safety thanks to standardized operating concept across all devices in the Liquiline, sampler and analyzer platform

• Fast commissioning thanks to: – Memosens: lab-calibrated sensors & hot plug-and-play – Preconfigured Liquiline transmitter – Easy extension and adaptation

• Minimum inventory: – Cross-platform, modular concept (e.g. identical modules

irrespective of parameters)

– Integration into Fieldcare and W@M facilitates effective

asset management

Liquiline CM442/CM444/CM448

Function and system design ................... 4

Measuring system ............................. 4

Application example ........................... 5

Device architecture .......................... 6

Slot and port assignment ........................ 6

Order of the modules ........................... 6

Basic rule for hardware upgrades ................... 6

Determining the hardware delivery status ............. 7

Terminal diagram ............................. 7

Device configuration using the example of a CM442-

**M1A1F0* ................................ 8

Function diagram CM442 ........................ 9

Device configuration using the example of a CM444-

**M42A1FA* .............................. 10

Function diagram CM444 ....................... 11

Device configuration using the example of a CM448-

**26A1* .................................. 12

Function diagram CM448 ....................... 13

Communication and data processing ........... 14

Dependability ............................. 14

Reliability ................................. 14

Maintainability .............................. 16

Safety .................................... 19

Input .................................... 20

Measured variables ........................... 20

Measuring ranges ............................ 20

Types of input ............................... 20

Input signal ................................ 20

Cable specification ............................ 20

Digital inputs, passive ....................... 20

Electrical specification ......................... 20

Span ..................................... 20

Nominal input current ......................... 20

PFM function ............................... 20

Test voltage ................................ 20

Cable specification ............................ 20

Current input, passive ....................... 20

Span ..................................... 20

Signal characteristic ........................... 20

Internal resistance ............................ 20

Test voltage ................................ 20

Output .................................. 21

Output signal ............................... 21

Signal on alarm .............................. 22

Load ..................................... 22

Linearization/transmission behavior ................ 22

Digital outputs, passive ..................... 22

Electrical specification ......................... 22

PFM function ............................... 22

Auxiliary voltage ............................. 22

Test voltage ................................ 22

Cable specification ............................ 22

Current outputs, active ...................... 22

Span ..................................... 22

Signal characteristic ........................... 22

Electrical specification ......................... 22

Cable specification ............................ 22

Relay outputs ............................. 22

Electrical specification ......................... 22

Cable specification ............................ 23

Protocol-specific data ....................... 23

HART .................................... 23

PROFIBUS DP ............................... 24

Modbus RS485 .............................. 24

Modbus TCP ................................ 24

EtherNet/IP ................................ 24

Web server ................................. 25

Power supply ............................. 25

Supply voltage .............................. 25

Fieldbus connection ........................... 25

Power consumption ........................... 25

Fuse ..................................... 26

Overvoltage protection ......................... 26

Cable entries ............................... 26

Cable specification ............................ 26

Electrical connection .......................... 27

Connecting optional modules ..................... 29

Protective ground connection .................... 31

Sensor connection ............................ 31

Performance characteristics .................. 33

Response time .............................. 33

Reference temperature ......................... 33

Measured error for sensor inputs .................. 33

Measured error for current inputs and outputs ......... 33

Frequency tolerance of digital inputs and outputs ....... 33

Resolution of current inputs and outputs ............. 33

Repeatability ............................... 33

Installation ............................... 34

Installation conditions ......................... 34

Installation ................................. 35

Environment .............................. 36

Ambient temperature range ..................... 36

Storage temperature .......................... 37

Humidity .................................. 37

Degree of protection .......................... 37

Vibration resistance ........................... 37

Electromagnetic compatibility .................... 37

Electrical safety .............................. 37

2 Endress+Hauser

Liquiline CM442/CM444/CM448

Degree of contamination ....................... 37

Pressure compensation to environment .............. 38

Mechanical construction .................... 38

Dimensions ................................ 38

Weight ................................... 38

Materials .................................. 38

Operability ............................... 39

display ................................... 39

Operating concept ............................ 39

Local operation .............................. 39

Remote operation ............................ 40

Language packages ........................... 41

Certificates and approvals ................... 42

 mark ................................... 42

EAC ..................................... 42

cCSAus ................................... 42

MCERTS .................................. 42

Ordering information ....................... 42

Product page ............................... 42

Product Configurator .......................... 42

Scope of delivery ............................. 43

Accessories ............................... 43

Protective cover .............................. 43

Post mounting kit ............................ 43

Measuring cable ............................. 43

Sensors ................................... 43

Additional functionality ........................ 47

Software .................................. 49

Other accessories ............................. 50

Endress+Hauser 3

Function and system design

1 2

Liquiline CM442/CM444/CM448

Measuring system

The overview shows examples of measuring systems. Other sensors and assemblies can be ordered for conditions specific to your application (www.endress.com/products).

Measuring point pH value or ORP

A complete measuring system comprises:

• TransmitterLiquiline

• Sensors with Memosens technology

• Assemblies to suit the sensors used

• Post or rail mounting (optional)

• Weather protection cover (optional)

 1 Measuring system (e.g. two-channel device)

1 Liquiline 2 Weather protection cover CYY101 (optional) 3, 5 Sensor cable CYK10 or fixed cable 4 Power supply cable (to be provided by the

customer)

Nitrate and SAC Turbidity and interface

Nitrate in wastewater

• Sensor CAS51D-**A2 with fixed cable

• Dipfit CYA112 immersion assembly

• Holder CYH112

SAC in the wastewater treatment outlet

• Sensor CAS51D-**2C2 with fixed cable

• Dipfit CYA112 immersion assembly

• Holder CYH112

Disinfection Ion-selective electrodes

Free available chlorine (and pH) in drinking water

• Sensor CCS142D

• Sensor CPS11D

• Measuring cable CYK10

• Flow assembly CCA250

pH measurement in drinking water (→ Fig.)

• Retractable assembly Cleanfit CPA871

• Sensor Orbisint CPS11D

• Measuring cable CYK10

ORP in drinking water

• Dipfit CYA112 immersion assembly

• Sensor Orbisint CPS12D

• Measuring cable CYK10

Conductivity

Inductive conductivity measurement in wastewater treatment

• Sensor Indumax CLS50D

• Sensor fixed cable

Conductive conductivity measurement in power plant cooling water

• Sensor Condumax CLS15D

• Measuring cable CYK10

Oxygen

Oxygen in aeration basins

• Dipfit CYA112 immersion assembly

• Holder CYH112

• Sensor

A0012411

– COS61D (optical) with fixed

cable (→ Fig.)

– COS51D (amperometric),

cable CYK10

Turbidity in industrial water

• Sensor Turbimax CUS51D with fixed cable (→ Fig.)

• Assembly Flowfit CUA250

• Spray head CUR3 (optional)

Interface in the primary clarifier

• Sensor Turbimax CUS71D

• Assembly CYA112

• Holder CYH112

Ammonium and nitrate measurement in the aeration basin

• Sensor CAS40D with fixed cable

• Holder CYH112

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Liquiline CM442/CM444/CM448

Outlet 1

CH 1:1 pH

CH 1:1 Temperature

CH 1:2 Nitrate

CH 2:1 SAC

CH 2:2 Turbidity

CH 3:1 Current Input [Flow]

6.99 pH

25.1 °C

9.02 mg/l

2.02 1/m

1022 FNU

15.1 nA

11:09:15 29.01.2013

10.00 mg/l

8.00 mg/l

09.01.2013 14:02:20

29.01.2013 11:09:15

6.00 pH

09.01.2013 14:02:20

29.01.2013 11:09:15

12.00 pH

Field Data Manager

If mounting outdoors, always use the weather protection cover (see "Accessories") to protect the transmitter against weather conditions.

Application example

Measuring point at wastewater treatment plant outlet (open channel)

• Transmitter CM444-AAM44A0FF with: 4x Memosens, Modbus TCP, 4 x relays for cleaning/limit value, 2 x analog current input

• pH and temperature with CPS11D, item 1, (www.endress.com/cps11d)

• Turbidity with CUS51D, item 2, (www.endress.com/cus51d)

• Nitrate with CAS51D, item 3, (www.endress.com/cas51d)

• Spectral absorption coefficient with CAS51D, item 4, (www.endress.com/cas51d)

• Flow from external measurement via current input

• Assembly holder CYH112 with assemblies CYA112 (www.endress.com/cyh112)

 2 Measuring point at wastewater treatment plant outlet

Data retention

• Storage of all measured values, incl. values of external sources, in the non-volatile memory (data logbook)

• Data called up on site via user-defined measuring menu and load curve display of the data logbook

• Transmission of data by ethernet, CDI interface or SD card and storage in a tamper-proof database (Field Data Manager)

• Data export to csv file (for Microsoft Excel)

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A0025077

Slot and port assignment

Slots

Ports

BASE-E

2DS 2DS 2DS 2AI 2AO 4R

Sensor 1

Sensor 2

Liquiline CM442/CM444/CM448

Device architecture

 3 Slot and port assignment of the hardware modules

• Inputs are assigned to measuring channels in the ascending order of the slots and ports. Adjacent example: "CH1: 1:1 pH glass" means: Channel 1 (CH1) is slot 1 (basic module) : Port 1 (input

1), pH glass sensor

• Outputs and relays are named according to their function, e.g. "current output", and are displayed with the slot and port numbers in ascending order

 4 Slot and port assignment on the

display

Order of the modules

Depending on the version ordered, the device is supplied with a number of electronic modules, which are assigned in a specific sequence in ascending order to slots 0 to 7. If you do not have a particular module, the next moves up automatically:

• The basic module (which is always present) always occupies slots 0 and 1

• Fieldbus module 485 or Ethernet module ETH (only one of the two modules can be used)

• Memosens input module 2DS (DS = digital sensor)

• Extension module for digital inputs and outputs DIO (DIO = digital input and output)

• Current input module 2AI (AI = analog input)

• Current output module 4AO or 2AO (AO = analog output)

• Relay modules AOR, 4R or 2R (AOR = analog output + relay, R = relay)

Basic rule for hardware upgrades

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Modules with 4 ports are connected before modules of the same type with 2 ports.

Please note the following if upgrading the device:

• The sum of all current inputs and outputs may not exceed 8!

• A maximum of two "DIO" modules may be used.

Liquiline CM442/CM444/CM448

1 2

42 41

Relay 1

Relay 2

Relay 3

Relay 4

Slot

Slot 4

Port 1

Pin 41

BASE-E 2DS

2AO

Determining the hardware delivery status

You must be aware of the type of modules and the number of them supplied with the device you have ordered to determine the delivery status of your Liquiline.

• Basic module One basic module in all versions. Always occupies slots 0 and 1.

• Fieldbus module Optional, and only one fieldbus module is possible.

• Input modules – Must be clearly assigned to the number of optional inputs ordered. – Examples:

2 current inputs = module 2AI 4 Memosens inputs = 2 inputs with basic module + module 2DS with 2 further inputs

• Current outputs and relays Various module combinations can exist. The following table will help you determine which modules your device has, depending on the type and number of outputs.

Relays

Current outputs

2 - 1 x 2R 1 x 4R

4 1 x 2AO 1 x AOR 1 x 2AO + 1 x 4R

6 1 x 4AO 1 x 4AO + 1 x 2R 1 x 4AO + 1 x 4R

8 1 x 4AO + 1 x 2AO 1 x 4AO + 1 x 2AO + 1 x 2R 1 x 4AO + 1x 2AO + 1 x 4R

Sum up the number of modules and sort them according to the specified sequence →  6.

‣

0 2 4

 This will give you the slot assignment for your device.

Terminal diagram

The unique terminal name is derived from:

Slot no. : Port no. : Terminal

Example, NO contact of a relay

Device with 4 inputs for digital sensors, 4 current outputs and 4 relays

• Base module BASE-E (contains 2 sensor inputs, 2 current outputs)

• 2DS module (2 sensor inputs)

• 2AO module (2 current outputs)

• 4R module (4 relays)

 5 Creating a terminal diagram using the example of the NO contact (terminal 41) of a relay

Endress+Hauser 7

A0025105

Device configuration using the example of a CM442**M1A1F0*

Liquiline CM442/CM444/CM448

Ordered basic device (example) • Order code CM442-**M1A1F0*

• Functionality: 1 x Memosens, 2 current outputs without HART

Extension options without additional modules

Extension options by using an extension module in free slot 2

Device upgrade to CM444 or CM448 • Upgrade kit 71135644 (100 to 230 V AC) or 71211434 (24 V DC)

Basic rule for extensions The sum of all current inputs and outputs may not exceed 8!

Restrictions if using CUS71D sensors for interface measurement

Product Configurator www.endress.com/cm442

• Second Memosens input (71114663)

• HART with activation code (71128428)

• Ethernet/PROFIBUS DP/Modbus with module 485 incl. activation code for the desired communication protocol: – PROFIBUS DP (71140888) – Modbus RS485 (71140889) – Modbus TCP (71140890) – EtherNet/IP (71219868) – Only Ethernet without fieldbus (71135634)

If fieldbus communication is subsequently required, an activation code is needed for this.

• Alternative for Ethernet or Modbus TCP: module ETH

If you retrofit module 485, any existing current outputs are



disabled! Alternative: ETH (Ethernet, Modbus TCP only).

Additional inputs or outputs, relays: – Module 2AI (71135639): 2 current inputs – Module 2AO (71135632): 2 current outputs – Module AOR (71111053): 2 current outputs, 2 relays – Module 2R (71125375) or 4R (71125376): 2 or 4 relays – Module DIO (71135638): 2 digital inputs and 2 digital outputs

– Extension power supply unit and backplane – BASE-E (Memosens inputs same as for base device) – 6 slots for extension modules

• Extension options: – Second Memosens input (71114663), additional modules same

as for CM442

– Up to 8 measuring channels by using an appropriate number of

Memosens input modules 2DS (71135631)

• CM442: Only one CUS71D can be connected. The second Memosens input may not be used.

• If extending to CM444: Every combination of CUS71D or other sensors is possible. All Memosens inputs (max. 4) can be used.

• An extension to CM448 is not advisable as the maximum number of Memosens inputs remains limited to 4.

8 Endress+Hauser

Liquiline CM442/CM444/CM448

optional

L+L-L

~ =

HART

optional

–

Function diagram CM442

Endress+Hauser 9

 6 Block circuit diagram CM442 1

2 3 4 5

Current output 1:1, + HART (optional) Current outputs (2 x optional) 2 x Memosens input (1 x optional) PROFIBUS DP/Modbus/Ethernet (optional) 2 x current input (optional)

Power connection

Service interface

Power supply, fixed cable sensors

Alarm relay

2 or 4 x relays (optional)

2 digital inputs and outputs (optional)

A0015791

Device configuration using the example of a CM444**M42A1FA*

Liquiline CM442/CM444/CM448

Ordered basic device (example) • Order code CM444-**M42A1FA*

• Functionality: – 4 x Memosens (2 on BASE-E module + 2 on an extension

module 2DS) – PROFIBUS communication (module 485) – 2 current outputs without HART (on BASE-E module) – 2 current inputs (module 2AI)

3 slots are still free in this example. More or fewer slots can be free in other versions.

Extension options without additional modules

Modification options without additional modules

Extension options by using extension modules in free slots 5-7

Basic rule for extensions The sum of all current inputs and outputs may not exceed 8!

Restrictions if using CUS71D sensors for interface measurement

Product Configurator www.endress.com/cm444

None

• Communication type changed by entering activation code. This disables the communication type used previously! – Modbus RS485 (71140889) – Modbus TCP (71140890) – EtherNet/IP (71219868)

• Retrofit to HART by removing module 485 and entering activation code for HART (71128428)

Only the following is possible for the example above: Module 2R (71125375) or 4R (71125376): 2 or 4 relays

If extending to eight measuring channels:

• Module 2DS (71135631): 2 Memosens inputs

• Use of the 2 current outputs in the basic module by entering activation code (71140891)

Additional inputs or outputs and relays if fieldbus module 485 is removed:

• Module 2AO (71135632): 2 current outputs

• Module AOR (71111053): 2 current outputs, 2 relays

• Module 2R (71125375) or 4R (71125376): 2 or 4 relays

• Module DIO (71135638): 2 digital inputs and 2 digital outputs

If you replace module 485 with ETH, you can operate up to 6



current outputs in addition to the ETH module's ethernet or Modbus function. Only two current outputs are possible with

485.

• With the CM444, any combination of maximum 4 Memosens sensors is possible.

• An extension to CM448 is not advisable as the maximum number of Memosens inputs remains limited to 4 if a CUS71D is used.

10 Endress+Hauser

Liquiline CM442/CM444/CM448

87 88 97 98

optional

87 88 97 98

3 8

87 88 97 98

3 8

optional

HART

optional

+ –

–

+ –

optional

L+L-L

~ =

Function diagram CM444

Endress+Hauser 11

 7 Block circuit diagram CM444 1

Current output 1:1, + HART (both optional) 2 3 4 5

Max. 7 x current output (optional)

Memosens input (2 x standard + 2 x optional)

PROFIBUS DP/Modbus/Ethernet (optional)

2 x current input (optional)

Power connection

Service interface

Power supply, fixed cable sensors

Alarm relay

2 or 4 x relays (optional)

2 digital inputs and outputs (optional)

A0015827

Device configuration using the example of a CM448**26A1*

Liquiline CM442/CM444/CM448

Ordered basic device (example) • Order code CM448-**26A1*

• Functionality: – 6 x Memosens (2 on BASE-E module + 2 on two extension

modules 2DS)

– PROFIBUS communication (module 485)

3 slots are still free in this example. More or fewer slots can be free in other versions.

Extension options without additional modules

Modification options without additional modules

Extension options by using extension modules in free slots 5-7

Basic rule for extensions The sum of all current inputs and outputs may not exceed 8!

Restrictions if using CUS71D sensors for interface measurement

Product Configurator www.endress.com/cm448

None

• Communication type changed by entering activation code. This disables the communication type used previously! – Modbus RS485 (71140889) – Modbus TCP (71140890) – EtherNet/IP (71219868)

• Retrofit to HART by removing module 485 and entering activation code for HART (71128428)

Only the following is possible for the example above: Module 2R (71125375) or 4R (71125376): 2 or 4 relays

If extending to eight measuring channels:

• Module 2DS (71135631): 2 Memosens inputs

• Use of the 2 current outputs in the basic module by entering activation code (71140891)

Additional inputs or outputs, relays:

• Module 2AO (71135632): 2 current outputs

• Module 2AI (71135639): 2 current inputs

• Module AOR (71111053): 2 current outputs, 2 relays

• Module 2R (71125375) or 4R (71125376): 2 or 4 relays

• Module DIO (71135638): 2 digital inputs and 2 digital outputs

If you replace module 485 with ETH, you can operate up to 6



current outputs in addition to the ETH module's ethernet or Modbus function. Only two current outputs are possible with

485.

The maximum number of Memosens inputs that can be used is limited to 4! Here, every combination of CUS71D and other Memosens sensors is then possible.

12 Endress+Hauser

Liquiline CM442/CM444/CM448

87 88 97 98

optional

87 88 97 98

3 8

optional

87 88 97 98

optional

HART

optional

–

optional

L+L-L

~ =

+ –

optional

Function diagram CM448

Endress+Hauser 13

 8 Function diagram CM448 1

Current output 1:1, + HART (both optional)

Max. 7 x current output (optional)

Max 8 x Memosens input (2 x of which are

optional)

PROFIBUS DP/Modbus/Ethernet (optional)

2 x current input (optional) Power connection

Service interface

Power supply, fixed cable sensors

Alarm relay

2 or 4 x relays (optional)

2 digital inputs and outputs (optional)

A0015828

Liquiline CM442/CM444/CM448

MEMO SENS

Communication and data processing

Types of communication:

• Fieldbuses – HART – PROFIBUS DP (Profile 3.02) – Modbus TCP or RS485

• EtherNet/IP

Only one type of Fieldbus communication can ever be active. The last activation code entered decides which bus is used.

The device drivers available make it possible to perform a basic setup and display measured values and diagnostics information via the fieldbus. A full device configuration via the fieldbus is not possible.

Extension module 485 and current outputs

For PROFIBUS DP, Modbus and Ethernet communication protocols:

• CM442 Current outputs cannot be used in parallel. Any existing current outputs are deactivated with the installation of 485.

• CM444/CM448 A maximum of 2 current outputs can be used in parallel.

Extension module ETH and current outputs

• Communication via Ethernet or EtherNet/IP

• CM442 A maximum of 2 current outputs can be used in parallel.

• CM444 and CM448 A maximum of 6 current outputs can be used in parallel.

Bus termination on the device

• Via slide switch at bus module 485

• Displayed via LED "T" on bus module 485

Reliability

Dependability

Memosens

Memosens makes your measuring point safer and more reliable:

• Non-contact, digital signal transmission enables optimum galvanic isolation

• No contact corrosion

• Completely watertight

• Sensor can be calibrated in a lab, thus increasing the availability of the measuring point in the process

• Intrinsically safe electronics mean operation in hazardous areas is not a problem.

• Predictive maintenance thanks to recording of sensor data, e.g.: – Total hours of operation – Hours of operation with very high or very low measured values – Hours of operation at high temperatures – Number of steam sterilizations – Sensor condition

Heartbeat diagnostics

• Heartbeat diagnostics screen with graphic indicators for the health of the device and sensor and with a maintenance or (sensor-dependent) calibration timer

• Heartbeat status information on the health of the device and the condition of the sensor

: Sensor/device condition or maintenance timer > 20 %; no action is required

– – : Sensor/device condition or maintenance timer > 5 ≤ 20 %, maintenance not yet urgent but

should be scheduled

– : Sensor/device condition or maintenance timer < 5 %, maintenance is recommended

• The Heartbeat sensor condition is the assessment of the calibration results and the sensor diagnostic functions.

14 Endress+Hauser

Liquiline CM442/CM444/CM448

An unhappy smiley can be due to the calibration result, the measured value status or to the operating hours limit having been exceeded. These limits can be configured in the sensor setup in a way that adapts the Heartbeat diagnostics to the application.

Heartbeat and NAMUR category

The Heartbeat status indicates the sensor or device condition while the NAMUR categories (F, C, M, S) assess the reliability of the measured value. The two conditions can correlate but do not have to.

• Example 1

• Example 2

Heartbeat Monitoring

Sensor data from Memosens sensors are transmitted via the EtherNet/IP and Modbus TCP fieldbus protocols. These data can be used for predictive maintenance, for instance.

Examples include:

• Total hours of operation

• Hours of operation with very high or very low measured values

• Hours of operation at high temperatures

• Number of steam sterilizations

• Sensor identification

• Calibration information

– The number of remaining cleaning cycles for the sensor reaches 20% of the defined maximum

number. The Heartbeat symbol changes from NAMUR status signal does not change.

– If the maximum number of cleaning cycles is exceeded, the Heartbeat symbol changes from

to . While the measured value can still be reliable, the NAMUR status signal changes to M (maintenance required).

The sensor breaks. The Heartbeat status changes immediately from status signal also changes immediately to F (failure).

SD EtherNet/IP and Modbus

to . The measured value is still reliable so the

to and the NAMUR

Heartbeat Verification

Heartbeat Verification makes it possible to verify the correct operation of the measuring device without interrupting the process. This verification can be documented anytime.

Sensor Check System (SCS)

The Sensor Check System (SCS) monitors the high impedance of the pH glass. An alarm is issued if a minimum impedance value is undershot or a maximum impedance is exceeded.

• Glass breakage is the main reason for a drop in high impedance values

• The reasons for increasing impedance values include: – Dry sensor – Worn pH glass membrane

For the SCS, upper and lower limit values can be enabled or disabled independently of one another.

Process Check System (PCS)

The process check system (PCS) checks the measuring signal for stagnation. An alarm is triggered if the measuring signal does not change over a specific period (several measured values).

The main causes of stagnating measured values are:

• Contaminated sensor, or sensor outside of medium

• Sensor defective

• Process error (e.g. through control system)

Self-monitoring functions

Current inputs are deactivated in the event of overcurrent and reactivated once the overcurrent stops. Board voltages are monitored and the board temperature is also measured.

Endress+Hauser 15

USP and EP

The limit functions for pharmaceutical water in accordance with USP and EP specifications are implemented in the software for conductivity measurements:

• "Water for Injection" (WFI) as per USP <645> and EP

• "Highly Purified Water" (HPW) as per EP

• "Purified Water" (PW) as per EP The uncompensated conductivity value and the temperature are measured for the USP/EP limit

functions. The measured values are compared against the tables defined in the standards. An alarm is triggered if the limit value is exceeded. Furthermore, it is also possible to configure an early warning alarm that signals undesired operating states before they occur.

ChemocleanPlus

Freely programmable sequence control

• e.g. for automatic sensor cleaning in retractable assemblies for reliable measurement results in processes with a high risk of contamination

• Individual, time-based activation of 4 outputs e.g. relays

• Starting, stopping or pausing of activities via digital input or fieldbus signals e.g. from limit position switches

Maintainability Modular design

The modular transmitter design means it can be easily adapted to suit your needs:

• Retrofit extension modules for new or extended range of functions, e.g. current outputs, relays and digital communication

• Upgrade to maximum eight-channel measurement

• Optional: M12 sensor connector for connecting any kind of Memosens sensor

• Optional: CDI connector for external access to the service interface (avoids having to unscrew the housing cover)

Liquiline CM442/CM444/CM448

 9 CM444: example

A0016027

 10 Extension module

A0012440

16 Endress+Hauser

+ 36 hidden pages

Endress+Hauser CM444, CM442 Specifications

Table of contents

Function and system design

Measuring system

Application example

Slot and port assignment

Device architecture

Order of the modules

Basic rule for hardware upgrades

Determining the hardware delivery status

Terminal diagram

Function diagram CM442

Function diagram CM444

Function diagram CM448

Communication and data processing

Reliability

Dependability

Maintainability Modular design