Endress+Hauser Liquisys M CPM253 User manual

BA194C/07/en/12.05
51500268
valid as of:
Liquisys Software-version 2.50
Operating Instructions
Liquisys M CPM223/253
Transmitter for pH and Redox

Endress+Hauser
Brief operating instructions
This explains how to use these Operating Instructions to commission your transmitter quickly and
safely:
Safety instructions
→Page 5 ff.
→Page 6
General safety instructions
Explanation of the warning symbols
You can find special instructions at the appropriate position in the chapter in question. The
positions are indicated with the icons Warning #, Caution "and Note !
Æ
Installation
→Page 10 ff.
→Page 12 ff.
Here you can find information on installation conditions and the dimensions of the transmitter.
You can find information on how to install the transmitter on this page.
Æ
Wiring
→Page 17 ff.
→Page 23 ff.
Here you can find out how to connect standard sensors to the transmitter.
Here you can find out how to connect digital sensors to the transmitter.
Æ
Operation
→Page 28 ff.
→Page 33 ff.
→Page 35 ff.
→Page 65 ff.
The display and operating elements are described here.
The operating concept is explained here.
The system configuration is explained here.
You can find information on how to calibrate the sensor on these pages.
Æ
Maintenance
→Page 78 ff.
→Page 81 ff.
→Page 86 ff.
→Page 94 ff.
Here you can find information on the maintenance of the entire measuring point.
The accessories which can be delivered for the transmitter are listed on the pages indicated.
Here you can find information on trouble-shooting.
Here you can find an overview of the spare parts which can be delivered as well as an overview
of the system.
Æ
Technical data
→Page 10 ff.
→Page 100 ff.
Dimensions
Ambient and process conditions, weight, materials etc.
Æ
Appendix
→Page 104 ff. Here you can find the operating matrix

Liquisys M CPM223/253
Endress+Hauser 3
Table of contents
1 Safety instructions . . . . . . . . . . . . . . . . 5
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Installation, commissioning and operation . . . . . . . . 5
1.3 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Notes on safety icons and symbols . . . . . . . . . . . . . . 6
2 Identification . . . . . . . . . . . . . . . . . . . . 7
2.1 Device designation . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1 Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.2 Product structure . . . . . . . . . . . . . . . . . . . . 7
2.1.3 Additional functions of the Plus Package . . . 8
2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Certificates and approvals . . . . . . . . . . . . . . . . . . . . 8
3 Installation . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Quick installation guide . . . . . . . . . . . . . . . . . . . . . . 9
3.1.1 Measuring system . . . . . . . . . . . . . . . . . . . . 9
3.2 Incoming acceptance, transport, storage . . . . . . . . . 10
3.3 Installation conditions . . . . . . . . . . . . . . . . . . . . . . 10
3.3.1 Field instrument . . . . . . . . . . . . . . . . . . . . 10
3.3.2 Panel-mounted instrument . . . . . . . . . . . . 11
3.4 Installation instructions . . . . . . . . . . . . . . . . . . . . . 12
3.4.1 Field instrument . . . . . . . . . . . . . . . . . . . . 12
3.4.2 Panel-mounted instrument . . . . . . . . . . . . 15
3.5 Post-installation check . . . . . . . . . . . . . . . . . . . . . . 15
4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Electrical connection without Memosens
functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.1 Connection diagram . . . . . . . . . . . . . . . . . 17
4.1.2 Measuring cable and sensor connection . . . 19
4.2 Electrical connection with Memosens
functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2.1 Connection diagram . . . . . . . . . . . . . . . . . 23
4.2.2 Measuring cable and sensor connection . . . 25
4.3 Alarm contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.4 Post-connection check . . . . . . . . . . . . . . . . . . . . . . 27
5 Operation . . . . . . . . . . . . . . . . . . . . . . 28
5.1 Quick operation guide . . . . . . . . . . . . . . . . . . . . . . 28
5.2 Display and operating elements . . . . . . . . . . . . . . . 28
5.2.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2.2 Operating elements . . . . . . . . . . . . . . . . . . 29
5.2.3 Key assignment . . . . . . . . . . . . . . . . . . . . . 30
5.3 Local Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.1 Automatic/manual mode . . . . . . . . . . . . . . 32
5.3.2 Operating concept . . . . . . . . . . . . . . . . . . . 33
5.4 System configuration . . . . . . . . . . . . . . . . . . . . . . . 35
5.4.1 Setup 1 (pH / Redox) . . . . . . . . . . . . . . . . 35
5.4.2 Setup 2 (temperature) . . . . . . . . . . . . . . . . 37
5.4.3 Current input . . . . . . . . . . . . . . . . . . . . . . 38
5.4.4 Current outputs . . . . . . . . . . . . . . . . . . . . . 41
5.4.5 Monitoring functions . . . . . . . . . . . . . . . . . 45
5.4.6 Relay contact configuration . . . . . . . . . . . . 50
5.4.7 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
5.4.8 E+H Service . . . . . . . . . . . . . . . . . . . . . . . 63
5.4.9 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . 64
5.5 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
5.6 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
6 Commissioning . . . . . . . . . . . . . . . . . . 71
6.1 Things to note when commissioning
digital sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.2 Things to note when commissioning I
SFET sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.3 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.4 Switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.5 Quick start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
7 Maintenance . . . . . . . . . . . . . . . . . . . . 76
7.1 Maintenance transmitter . . . . . . . . . . . . . . . . . . . . 76
7.1.1 Dismantling of panel mounted instrument . 76
7.1.2 Dismantling of field instrument . . . . . . . . . 77
7.1.3 Replacing the controller . . . . . . . . . . . . . . . 77
7.2 Maintenance of the entire measuring point . . . . . . . 78
7.2.1 Cleaning the transmitter . . . . . . . . . . . . . . 78
7.2.2 Cleaning the pH/Redox sensors . . . . . . . . . 79
7.2.3 Maintaining digital sensors . . . . . . . . . . . . . 79
7.2.4 Liquid KCl supply . . . . . . . . . . . . . . . . . . . 80
7.2.5 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 80
7.2.6 Connecting lines and junction boxes . . . . . 80
7.3 "Optoscope" service tool . . . . . . . . . . . . . . . . . . . . 80
8 Accessories . . . . . . . . . . . . . . . . . . . . . 81
8.1 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
8.2 Connection accessories . . . . . . . . . . . . . . . . . . . . . 81
8.3 Mounting accessories . . . . . . . . . . . . . . . . . . . . . . . 82
8.4 Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
8.5 Software and hardware add-ons . . . . . . . . . . . . . . . 84
8.6 Calibration solutions . . . . . . . . . . . . . . . . . . . . . . . 85
8.7 Optoscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Liquisys M CPM223/253
4Endress+Hauser
9 Trouble-shooting . . . . . . . . . . . . . . . . . 86
9.1 Trouble-shooting instructions . . . . . . . . . . . . . . . . . 86
9.2 System error messages . . . . . . . . . . . . . . . . . . . . . . 86
9.3 Process specific errors . . . . . . . . . . . . . . . . . . . . . . 89
9.4 Instrument specific errors . . . . . . . . . . . . . . . . . . . 92
9.5 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
9.5.1 Panel mounted instrument . . . . . . . . . . . . . 95
9.5.2 Field instrument . . . . . . . . . . . . . . . . . . . . 97
9.6 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
9.7 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
10 Technical data . . . . . . . . . . . . . . . . . . 100
10.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
10.2 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
10.3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
10.4 Performance characteristics . . . . . . . . . . . . . . . . . 101
10.5 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
10.6 Mechanical construction . . . . . . . . . . . . . . . . . . . 102
10.7 Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . 102
11 Appendix. . . . . . . . . . . . . . . . . . . . . . 104
Index. . . . . . . . . . . . . . . . . . . . . . . . . 109

Liquisys M CPM223/253 Safety instructions
Endress+Hauser 5
1 Safety instructions
1.1 Designated use
Liquisys M is a transmitter for determining the pH value and/or the redox potential.
The transmitter is particularly suited for use in the following areas:
• Chemical industry
• Pharmaceutical industry
• Food industry
• Drinking water treatment
• Condensate treatment
• Municipal sewage treatment plants
• Water treatment
• Electroplating
Any other use than the one described here compromises the safety of persons and the entire
measuring system and is, therefore, not permitted.
The manufacturer is not liable for damage caused by improper or non-designated use.
1.2 Installation, commissioning and operation
Please note the following items:
• Installation, electrical connection, commissioning, operation and maintenance of the measuring
system must only be carried out by trained technical personnel.
The technical personnel must be authorised for the specified activities by the system operator.
• Technical personnel must have read and understood these Operating Instructions and must
adhere to them.
• Before commissioning the entire measuring point, check all the connections for
correctness. Ensure that electrical cables and hose connections are not damaged.
• Do not operate damaged products and secure them against unintentional
commissioning. Mark the damaged product as being defective.
• Measuring point faults may only be rectified by authorised and specially trained
personnel.
• If faults can not be rectified, the products must be taken out of service and secured against
unintentional commissioning.
• Repairs not described in these Operating Instructions may only be carried out at the
manufacturer’s or by the service organisation.
1.3 Operational safety
The transmitter has been designed and tested according to the state of the art and left the factory in
perfect functioning order.
Relevant regulations and European standards have been met.
As the user, you are responsible for complying with the following safety conditions:
• Installation instructions
• Local prevailing standards and regulations.
Ex systems have an additional Ex documentation which is part of the Operating Instructions (see
also chapter "Scope of delivery").

Safety instructions Liquisys M CPM223/253
6Endress+Hauser
EMC
This instrument has been tested for electromagnetic compatibility in industrial use according to
applicable European standards.
Protection against interference as specified above is valid only for an instrument
connected according to the instructions in these Operating Instructions.
1.4 Return
If the transmitter has to be repaired, please return it cleaned to the sales centre responsible.
Please use the original packaging, if possible.
1.5 Notes on safety icons and symbols
Safety icons
Electrical symbols
#
Warning!
This symbol alerts you to hazards. They can cause serious damage to the instrument or to persons
if ignored.
"
Caution!
This symbol alerts you to possible faults which could arise from incorrect operation. They could
cause damage to the instrument if ignored.
!Note!
This symbol indicates important items of information.
%Direct Current (DC)
A terminal at which DC is applied or through which DC flows.
&Alternating Current (AC)
A terminal at which (sine-form) AC is applied or through which AC flows.
)Ground connecting
A terminal, which, from the user’s point of view, is already grounded using a grounding system.
*Protective earth terminal
A terminal which must be grounded before other connections may be set up.
bAlarm relay
Input
Output
DC voltage source
Temperature sensor

Liquisys M CPM223/253 Identification
Endress+Hauser 7
2 Identification
2.1 Device designation
2.1.1 Nameplate
Compare the order code on the nameplate (on the transmitter) with the product structure (s.b.) and
your order.
The device version can be identified from the order code.
!Note!
The enabling codes for retrofitting the software for Chemoclean (to the left of the forward slash) or
the Plus Package (to the right of the forward slash) are listed under "Codes".
2.1.2 Product structure
C07-CPM2x3xx-18-06-00-xx-001.eps
Fig. 1: CPM253 nameplate (example)
C07-CPM2x3xx-18-06-00-xx-002.eps
Fig. 2: CPM223 nameplate (example)
Sensor input; software
IS pH (glass/ISFET) / ORP; Plus package
MR pH (digital sensor); basic version
MS pH (digital sensor); Plus package
PR pH (glass)/ORP; basic version
PS pH (glass)/ORP; Plus package
Power supply; approval
0230VAC
1115VAC
2 230 V AC; CSA Gen. Purp.
3 115 V AC; CSA Gen. Purp.
4 230 V AC; ATEX II 3G [EEx nAL] IIC
5100VAC
6 24 V AC/DC; ATEX II 3G [EEx nAL] IIC for CPM223, EEx nA[L] IIC T4 for CPM253
7 24 V AC; CSA Gen. Purp.
824VAC/DC
Output
0 1 x 20 mA, pH/ORP
1 2 x 20 mA, pH/ORP + selectable
3PROFIBUSPA
4PROFIBUSDP
5 1 x 20 mA, pH/ORP HART
6 2 x 20 mA, pH/ORP HART + selectable
Additional contacts; analogue input
05 not selected
10 2 x relay (limit/P(ID)/timer)
15 4 x relay (limit/P(ID)/Chemoclean)
16 4 x relay (limit/P(ID)/timer)
20 2 x relay (limit/P(ID)/timer); 20 mA
25 4 x relay (limit/P(ID)/Chemoclean); 20 mA
26 4 x relay (limit/P(ID)/timer); 20 mA
CPM253-
complete order code
CPM223-
131085-4D
order code
serial no
. /
codes
CPM 253-PS1515
276944
pH0…14 +/-1500 mV
-50 … 150°C
0/4 … 20 mA
230 VAC 50/60 Hz 7.5 VA
-10 … +55°CIP 65
0/4…20mA
-
8732
prot. class ambient temp
.
output 1
output 2
mains
meas. range
temperature
3472
LIQUISYS M
pH / Redox
Made in Germany, D-70839 Gerlingen
131085-4D
order code
serial no
. /
codes
CPM 223-PR0110
276945
pH0…14 +/-1500 mV
-50 … 150°C
0/4 … 20 mA
230 VAC 50/60 Hz 7.5 VA
-10 … +55°CIP 54/ IP 30
0/4 … 20 mA
-
8732
3472
prot. class ambient temp.
output 1 output 2
mains
meas. range
temperature
LIQUISYS M
pH / Redox
Made in Germany, D-70839 Gerlingen

Identification Liquisys M CPM223/253
8Endress+Hauser
2.1.3 Additional functions of the Plus Package
• Current output table to cover large areas with varying resolution
• Monitoring of sensor and process for safe operation
• Neutralisation controller to keep pH value constant by dosing acid and alkali
• Automatic cleaning function start
2.2 Scope of delivery
The delivery of the field instrument includes:
• 1 transmitter CPM253
•1plug-inscrewterminal
• 1 cable gland Pg 7
• 1 cable gland Pg 16 reduced
• 2 cable glands Pg 13.5
• 1 operating instructions BA 194C/07/en
• versions with HART communication:
1 operating instructions Field Communication with HART, BA 208C/07/en
• versions with PROFIBUS communication:
1 operating instructions Field Communication with PROFIBUS PA/DP, BA 209C/07/en
• versions with explosion protection for hazardous area zone II (ATEX II 3G):
Safety instructions for use in explosion-hazardous areas, XA 194C/07/a3
The delivery of the panel mounted instrument includes:
• 1 transmitter CPM223
• 1 set of plug-in screw terminals
• 2 tensioning screws
• 1 BNC-plug (solder-free)
• 1 operating instructions BA 194C/07/en
• versions with HART communication:
1 operating instructions Field Communication with HART, BA 208C/07/en
• versions with PROFIBUS communication:
1 operating instructions Field Communication with PROFIBUS PA/DP, BA 209C/07/en
• versions with explosion protection for hazardous area zone II (ATEX II 3G):
Safety instructions for use in explosion-hazardous areas, XA 194C/07/a3
If you have any questions, please contact your supplier or your sales centre responsible .
2.3 Certificates and approvals
Declaration of conformity
The product meets the legal requirements of the harmonised European standards.
The manufacturer confirms compliance with the standards by affixing the 4symbol.
Explosion protection for Zone 2
CPM253-..6... ATEX II 3G EEx nA[L] IIC T4
CPM253-..4...
CPM223-..4...
CPM223-..6...
ATEX II 3G [EEx nAL] IIC

Liquisys M CPM223/253 Installation
Endress+Hauser 9
3 Installation
3.1 Quick installation guide
#Warning!
If the measuring point or parts of the measuring point are in explosion-hazardous areas you have to
follow the "Safety instructions for electrical apparatus certified for use in explosion-hazardous
areas". These instructions (XA 194C/07/a3) are part of the scope of delivery.
Proceed as follows to completely install the measuring point:
• Install the transmitter (see "Installation instructions" section).
• If the sensor is not yet installed in the measuring point, install it (see Technical Information of the
sensor).
• Connect the sensor to the transmitter as illustrated in the "Electrical connection" section.
• Connect the transmitter as illustrated in the "Electrical connection" section.
• Commission the transmitter as explained in the "Commissioning" section.
3.1.1 Measuring system
A complete measuring systems comprises:
• The transmitter Liquisys M CPM223 or CPM253
• A pH/ORP electrode with or without an integrated temperature sensor
• An immersible, flow or retractable assembly
• A measuring cable(e.g. CPK9)
Options: extension cable, junction box VBA or VBM
C07-CPM2x3xx-14-06-00-xx-001.eps
Fig. 3: Complete measuring system Liquisys M CPM223/253
1
2
3
4
5
Flow assembly CPA250
Junction box VBA
Liquisys M CPM253
Measuring cable e.g. CPK9
Liquisys M CPM223
6
7
8
9
Retractable assembly Cleanfit W CPA450
Electrode, e.g Orbisint CPS11
Immersion assembly CPA111
Extension cable
CAL REL
REL1
REL1
ALARM
REL2
REL2
E
CAL REL
REL1
REL1
ALARM
REL2
REL2
E
123
4
5
6
7
8
4
9

Installation Liquisys M CPM223/253
10 Endress+Hauser
3.2 Incoming acceptance, transport, storage
• Make sure the packaging is undamaged!
Inform the supplier about damage to the packaging.
Keep the damaged packaging until the matter has been settled.
• Make sure the contents are undamaged!
Inform the supplier about damage to the delivery contents.
Keep the damaged products until the matter has been settled.
• Check that the scope of delivery is complete and agrees with your order and the
shipping documents.
• The packaging material used to store or to transport the product must provide shock protection
and humidity protection. The original packaging offers the best protection. Also, keep to the
approved ambient conditions (see "Technical data").
• If you have any questions, please contact your supplier or your sales centre responsible.
3.3 Installation conditions
3.3.1 Field instrument
C07-CxM253xx-06-06-00-en-001.EPS
Fig. 4: Field instrument
!Note!
There is a hole in the punching for the cable entry (connection of supply voltage). It serves as a
pressure balance during air freight dispatching. Make sure no moisture penetrates the inside of the
housing before the cable installation. The housing is completely air-tight after the cable installation.
CAL REL
REL 1
REL 1
ALARM
REL 2
REL 2
E
Pg 7
Pg 16
M 5
11/
0.43
Ø 6 /
Ø 0.24
115 / 4.53
157 / 6.18
247 / 9.72
70 / 2.76
70 / 2.76
154 / 6.06
170 / 6.69
mm / inch
Pg 13.5

Liquisys M CPM223/253 Installation
Endress+Hauser 11
3.3.2 Panel-mounted instrument
C07-CxM223xx-06-06-00-en-001.EPS
Fig. 6: Panel-mounted instrument
C07-CxM253xx-11-06-00-xx-001.eps
Fig. 5: View into the field housing
1
2
3
4
Removable electronics box
Partition plate
Terminals
Fuse
1
2
3
4
90 / 3.54
139 / 5.47
96 / 3.78
6 /
0.24
mm / inch
92 / 3.62
149.5 / 5.89

Installation Liquisys M CPM223/253
12 Endress+Hauser
3.4 Installation instructions
3.4.1 Field instrument
There are several ways of securing the field housing:
• Wall mounting with fixing screws
• Post mounting to cylindrical pipes
• Post mounting to square securing mast
!Note!
When mounting in the open air with unprotected exposure to weather conditions, a weather
protection cover (see Accessories) is required.
Transmitter wall mounting
C07-CxM253-11-06-00-en-002.eps
Fig. 7: Field instrument wall mounting
For wall mounting the transmitter, proceed as follows:
1. Drill the bores as shown in Fig. 7 .
2. Drive the two fixing screws through the securing bores (1) from the front.
3. Mount the transmitter on the wall as shown.
4. Cover the bores with plastic caps (2).
1
2
154 / 6.06
mm / inch
Ø 6 /
Ø 0.24

Liquisys M CPM223/253 Installation
Endress+Hauser 13
Transmitter post mounting
!Note!
You require a post mounting kit to secure the field device to horizontal and vertical posts or pipes
(max. Ø 60 mm(2.36")). This can be acquired as an accessory (see "Accessories" section).
C07-CxM253xx-11-06-00-en-003.eps
Fig. 8: Post mounting field device to cylindrical pipes
For post mounting the transmitter, proceed as follows:
1. Guide the two securing screws (1) of the mounting kit through the openings of the securing
plate (3).
2. Screw the securing plate onto the transmitter using the four fixing screws (2).
3. Secure the retainer with the field device using the clip on the post or pipe.
1
2
3
1
1
3
Ømax. 60 /
2.36

Installation Liquisys M CPM223/253
14 Endress+Hauser
You can also secure the field device to a square universal post in conjunction with the weather
protection cover. These can be acquired as accessories, see "Accessories" section.
C07-CxM253xx-11-06-00-xx-004.eps
Fig. 9: Mounting field device with universal posts and weather protection cover
For mounting the weather protection cover, proceed as follows:
1. Screw the weather protection cover with 2 screws (bores 1) to the upright post (bores 2).
2. Secure the field device to the weather protection cover. To do so, use the bores (3).
3
1
2
3

Liquisys M CPM223/253 Installation
Endress+Hauser 15
3.4.2 Panel-mounted instrument
The panel-mounted instrument is secured with the clamping screws supplied (see →Fig. 10).
The necessary installation depth is approx. 165 mm (6.50").
C07-CxM223xx-11-06-00-en-001.eps
Fig. 10: Securing the panel-mounted instrument
1 Wall of the cabinet
2Seal
3 Clamping screws
* Required installation depth
3.5 Post-installation check
• After installation, check the transmitter for damage.
• Check whether the transmitter is protected against moisture and direct sunlight.
1
2
3
3
3
92 / 3.62
+0.5 +0.02
92 / 3.62
+0.5 +0.02
90 / 3.54
57 / 2.24
33 /
1.30
approx. 25 /
0.98
139 / 5.47
max. 45 /
1.77 6 /
0.24
96 / 3.78
92 /
3.62
approx. 165 / 6.50*

Wiring Liquisys M CPM223/253
16 Endress+Hauser
4 Wiring
#Warning!
• The electrical connection must only be carried out by authorised technical personnel.
• Technical personnel must have read and understood the instructions in this manual and must
adhere to them.
• Ensure that there is no voltage at the power cable before beginning the connection work.
The electrical connection of the transmitter differs depending on the device version:
• If you are using a device without Memosens functionality, please read the instructions in the
"Electrical connection without Memosens functionality" section.
• If you are using a device with Memosens functionality, please read the instructions in the
"Electrical connection with Memosens functionality" section.

Liquisys M CPM223/253 Wiring
Endress+Hauser 17
4.1 Electrical connection without Memosens functionality
4.1.1 Connection diagram
The wiring diagram depicted in Fig. 11 shows the connections of an instrument equipped with all
the options. Connecting the sensors to the various measuring cables is explained in more detail in
the "Measuring cables and sensor connection" section.
C07-CPM2x3xx-04-06-00-xx-001.eps
Fig. 11: Transmitter electrical connection without Memosens functionality
A
B
C
D
E
F
G
H
I
Standard sensor
ISFET sensor
Outer screen connection for glass electrodes
Potential matching
Temperature sensor
Signal output 1 pH/redox
Signal output 2 temperature, pH/redox or controller
Binary input 1 (Hold)
Binary input 2 (Chemoclean)
J
K
L
M
N
O
P
Q
Auxiliary voltage output
Alarm (contact position currentless)
Relay 1 (contact position currentless)
Relay 2 (contact position currentless)
Relay 3 (contact position currentless)
Relay 4 (contact position currentless)
Current input 4 ... 20 mA
Power supply
pH
Ref.
11
12
13
47
48
49
57
58
59
51
52
53
54
55
56
PA/
PM
15 V
85
86
S
10-50 V
81
93
82
94
10-50 V
L+
L-
L1
N
23 +
24 -
mA
~=
41
42
43
pH
mA
31
32
mA
33
34
A
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
SRC
DRN.
B

Wiring Liquisys M CPM223/253
18 Endress+Hauser
!Note!
• The device is approved for protection class II and is generally operated without a protective earth
connection.
• To guarantee measuring stability and functional safety, you have to ground the outer screen of the
sensor cable:
– Glass electrodes (PR/PS device version): terminal "S"
– ISFET sensors (IS device version): PE distributor rail
This is on the cover frame for panel-mounted instruments and in the connection compartment
for field devices.
• Ground the PE distributor rail or the ground terminal.
Field instrument connection
Guide the measuring cables through the PG glands into the housing. Connect the measuring cables
in accordance with the terminal assignment (→Fig. 12).
C07-CPM253xx-04-06-00-xx-002.eps
Fig. 12: Field instrument connection compartment sticker
1 PE distributor rail for IS device version
Panel-mounted instrument connection
C07-CPM223xx-04-06-00-xx-003.eps
Fig. 13: Panel-mounted instrument connection sticker
1 Ground terminal for IS device version
pH / Redox (Glas) 42
+++++-----
434154 55 56
NC
SRC
DRN
31
11
12
32
13
PA/PM
3433
S
REF (Glas/IsFET)
(IsFET)
(IsFET)
NC 938685 94 81 82 NC
51 52 53 57 58 59 47 48 49
pH
Redox
Temp.
(opt.)
+15V
10mA
YE
WHRD
GN
BN
REL 4SENSOR REL 3 REL 2 REL 1
NC
Mains
Hilfsenergie
131094-4G
Digital 2 Digital 1
11 13
12
L1
+
N
-
(AC)
(DC)
Contacts:
max. 2A
AC: 250V/500VA
DC: 30V/60W
+-
23 24
4..20mA
1
BNC: pH/Redox + REF
31 +
Sensor
32 -
33 +
34 -
85 +
86 -
93 +
94 - 42
81 + 43
82 - 41
pH
Redox
Temp.
(opt.)
+15V
10mA
Digital 2
Digital 1
NC
NC
NC
131081-4E
S
REF
PA/PM
12
13
11
YE
WH
GN
RD
BN
SRC (IsFET)
(Glass)
IsFET
Glass
()
DRN
Mains Contacts: max. 2A, AC:250V/500VA, DC:30V/60W
L1 +
AC DC
N-
REL1
REL2
REL3
REL4
4..20mA
24
23
49
COM
COM
COM
COM
-
+
59
54
55
56
52
51
53
58
57
48
47
131084-4C
BNC: pH/Redox + REF
31 +
Sensor
32 -
33 +
34 -
85 +
86 -
93 +
94 - 42
81 + 43
82 - 41
pH
Redox
Temp.
(opt.)
+15V
10mA
Digital 2
Digital 1
NC
NC
NC
131081-4E
S
REF
PA/PM
12
13
11
YE
WH
GN
RD
BN
SRC (IsFET)
(Glass)
IsFET
Glass
()
DRN
Mains Contacts: max. 2A, AC:250V/500VA, DC:30V/60W
L1 +
AC DC
N-
REL1
REL2
REL3
REL4
4..20mA
24
23
49
COM
COM
COM
COM
-
+
59
54
55
56
52
51
53
58
57
48
47
131084-4C
1

Liquisys M CPM223/253 Wiring
Endress+Hauser 19
"Caution!
• Terminals marked NC may not be wired.
• Unmarked terminals may not be wired.
!Note!
Please label the sensor terminal block with the sticker provided.
4.1.2 Measuring cable and sensor connection
You require screened special measuring cables to connect pH and redox electrodes to the
transmitter. The following multi-core and ready-to-use cable types can be used:
Structure and termination of the measuring cables
C07-CPM2x3xx-04-06-00-en-004.eps
Fig. 14: Structure of the special measuring cables
!Note!
For further information on the cables and junction boxes, please refer to the "Accessories" section.
Sensor type Cable Extension
Electrode without temperature sensor CPK1 VBA / VBM box + CYK71 cable
Electrode with temperature sensor Pt 100 and
TOP 68 plug-in head
CPK9 VBA / VBM box + CYK71 cable
ISFET sensor with temperature sensor Pt 100 /
Pt 1000 and TOP 68 plug-in head
CPK12 VBA / VBM box + CYK12 cable
pH individual electrode with separate reference
electrode and separate temperature sensor
CPK2 VBA / VBM box + PMK cable
CPK1
CPK2
CPK9
CPK12
PM
pH / Redox
PM
pH or Redox
Ref. or Redox
Pt 100
PM
pH + Pt 100 / Pt 1000
PM
pH + Pt 100 / Pt 1000
Coax Ref.
pH or Redox
BN PM
BN PM
pH or Redox
RD Redox or Ref.
BU Ref.
GN Temp.
YE Temp.
WH Temp.
Coax BK Ref.
inner pH
GN Temp.
WH Temp.
YE Temp.
BN PM
Coax BK
inner
GN Temp.
WH Temp.
YE Temp.
RD DRN
BN PM
Ref
SRC IsFET

Wiring Liquisys M CPM223/253
20 Endress+Hauser
Field instrument measuring cable connection
Proceed as follows to connect a pH-electrode to the field instrument:
1. Open the housing cover to access the terminal block in the connection compartment.
2. Break the punching of a cable gland from the housing, mount a PG gland and guide the cable
through this Pg gland.
3. Connect the cable in accordance with the terminal assignment .
4. Tighten the Pg gland.
"Caution!
Make sure to protect the connectors, cable ends and terminals against moisture as this could result
in incorrect measurement!
Panel-mounted instrument measuring cable connection
To connect a pH electrode to the panel-mounted instrument, connect the cable in accordance with
the terminal assignment to the terminals on the rear of the device.
If you are using glass electrodes with the panel-mounted instrument, you have to terminate the
measuring cable with a BNC connector. A solder-free BNC connector is supplied with the device.
Proceed as follows:
1. Cut off end sleeves 2 and 3 of the coaxial
cable (→Fig. 15).
C07-CPM223xx-04-06-00-xx-013.eps
Fig. 15: Cable CPK1: device connection
1 Coaxial cable
2 Inner screen BK (ref.)
3 Inner coax (pH / mV)
4 Strand BN (PM)
2. Push the cable gland 5 and the washer 6 onto
the coaxial cable.
3. Remove the insulation (13 mm(0.51")) and
screw the clamping ring 7 onto the insulation.
!Note!
Parts 5 to 7 are supplied with the BNC
connector for cable diameters 3.2 mm (0.13")
and 5 mm (0.20").
4. Fold the braided screen 8 of the screen over
the clamping ring and cut off the excess
material.
5. There is a semi-conductor layer 14
(conductive foil) between the inner insulation
and the braided screen 8. Strip this
semi-conductor layer to the braided screen. C07-CPM223xx-04-06-00-en-014.eps
Fig. 16: Terminating the pH connecting cable for
mounting the BNC elbow plug
6. Remove the inner insulation (4 mm (0.16")).
7. Position end sleeve 13 onto the stripped inner
conductor and secure the end sleeve with a
crimping pliers.
C07-CPM223xx-04-06-00-en-015.eps
Fig. 17: Terminating the pH connecting cable for
mounting the BNC elbow plug
3
4
1
2
56
56 7
8
14
13 / 0.51
16 / 0.63
13
4 /
0.16