Liquiline M CM42

Summary

Product identification

The Endress+Hauser Liquiline M CM42 is a two-wire transmitter for liquid analysis in process technology. It is available in a robust plastic version and a hygienic stainless steel version.

Applications

• Chemical processes
• Pharmaceutical industry
• Food technology
• Applications in hazardous areas

Supported sensor technologies

• Memosens: pH/ORP, oxygen, conductivity
• Analog sensors: pH/ORP, conductivity, concentration, resistivity

Input

Measured variables and ranges

Documentation of the connected sensor applies.

Memosens Sensors

• Cable specification: CYK10, CYK20 with Memosens; Max. cable length 100 m (330 ft). Fixed cable with Memosens (CLS50D, CLS54D); Max. cable length 100 m (330 ft).
• Ex specification: Intrinsically safe sensor circuit with type of protection: Ex ia IIC, Ex ic IIC, Ex ib IIC, or 1Ex ib IIC.
  • Max. output voltage Uo: 5.04 V
  • Max. output current Io: 80 mA
  • Max. output power Po: 112 mW

Analog pH/ORP Sensors

• Cable specification:
  • Without SCS: Max. cable length 50 m (160 ft)
  • With SCS: Max. cable length 20 m (65 ft)
• Temperature sensors: Pt100, Pt1000, NTC 30K
• Ex specification: Intrinsically safe sensor circuit with type of protection: Ex ia IIC, Ex ic IIC, or 1Ex ib IIC.
  • Glass Electrodes:
    • Max. output voltage Uo: 10.08 V
    • Max. output current Io: 4.1 mA
    • Max. output power Po: 10.2 mW
    • Max. external inductance Lo: 1 mH
    • Max. external capacitance Co: 250 nF
  • ISFET Electrodes:
    • Max. output voltage Uo: 10.08 V
    • Max. output current Io: 50.7 mA
    • Max. output power Po: 128 mW
    • Max. external inductance Lo: 1 mH
    • Max. external capacitance Co: 250 nF
• Input impedance: > 10¹² Ω
• Input leak current: < 10⁻¹³ A

Analog Conductivity Sensors

• Cable specification (Conductive Measurement):
  • Two-electrode sensor:
    • 10 μS/cm·k to 20 mS/cm·k / 0.1 MΩ·k to 50 Ω/k; Max. cable length 100 m (330 ft)
    • 5 μS/cm·k to 20 mS/cm·k / 0.2 MΩ·k to 50 Ω/k; Max. cable length 50 m (160 ft)
    • 0.1 μS/cm·k to 20 mS/cm·k / 20 MΩ·k to 50 Ω/k; Max. cable length 15 m (50 ft)
  • Four-electrode sensor:
    • 10 μS/cm·k to 1.5 S/cm·k; Max. cable length 100 m (330 ft)
    • 0.1 μS/cm·k to 20 mS/cm·k; Max. cable length 15 m (50 ft)
• Cable specification (Inductive Measurement):
  • Max. cable length 55 m (180 ft) (CLS50)
  • Max. cable length 50 m (160 ft) (CLS54)
• Temperature sensors: Pt100, Pt1000
• Ex specification (Conductive Measurement):
  • Intrinsically safe sensor circuit with type of protection: Ex ia IIC or Ex ic IIC.
  • Max. output voltage Uo: 10.08 V
  • Max. output current Io: 23 mA
  • Max. output power Po: 57 mW
  • Max. external inductance Lo: 300 μH
  • Max. external capacitance Co: 50 nF
• Ex specification (Inductive Measurement):
  • Intrinsically safe sensor circuit with type of protection: Ex ia IIC, Ex ic IIC, Ex ib IIC, or 1Ex ib IIC.
  • Max. output voltage Uo: 10.08 V
  • Max. output current Io: 64 mA
  • Max. output power Po: 128 mW
  • Max. external inductance Lo: 0.1 mH
  • Max. external capacitance Co: 1.8 μF

Output

Output signal

• Current output:
  • 1x 4 to 20 mA, passive, potentially isolated (Memosens only)
  • 2x 4 to 20 mA, passive, potentially isolated (Memosens only and from one another)
• HART:
  • Signal encoding: FSK ± 0.5 mA above current signal
  • Data transmission rate: 1200 baud
• PROFIBUS PA:
  • Signal encoding: Manchester Coding Bus Powered (MBP), in compliance with IEC 61158-2
  • Data transmission rate: 31.25 kBit/s
• FOUNDATION Fieldbus:
  • Signal encoding: Manchester Coding Bus Powered (MBP), in compliance with IEC 61158-2
  • Data transmission rate: 31.25 kBit/s

Signal on alarm

Configurable: 3.6 to 21.5 mA (4.0 mA fixed in HART Multidrop mode) or digital via fieldbus.

Load

• Max. load with supply voltage 24 V: 500 Ω
• Max. load with supply voltage 30 V: 750 Ω

Output span

3.6 to 21.5 mA

Ex specification, current output

• Intrinsically safe power supply and signal circuits, passive.
• Max. input voltage Ui: 30 V
• Max. input current Ii: 100 mA
• Max. input power Pi: 800 mW (all except TIIS) or 750 mW (TIIS)

Ex specification PROFIBUS and FOUNDATION Fieldbus

• Suitable for use as a field device in a FISCO system according to EN/IEC 60079-27.
• Max. input voltage Ui: 17.5 V
• Max. input current Ii: 380 mA
• Max. input power Pi: 5.32 W
• Max. internal inductance Li: < 10 μH
• Max. internal capacitance Ci: < 5 nF

Power supply

Supply voltage

• Current output / HART: Minimum supply voltage of 11.5 V (without HART) or 12.5 V (with HART). Max. 30 V DC. Nominal voltage: 24 V DC.
• PROFIBUS/FOUNDATION Fieldbus: 9 to 32 V DC (non-Ex); 9 to 17.5 V DC (Ex, FISCO). Bus current consumption: 22 mA.

Mechanical construction

Dimensions

• Plastic housing: 220 mm (8.66") height, 110 mm (4.33") width.
• Stainless steel housing: 220 mm (8.66") height, 150 mm (5.91") width.

Weight

• Plastic housing: 1.5 kg (3.3 lbs)
• Stainless steel housing: 2.1 kg (4.6 lbs)

Materials

• Plastic housing: Housing - PC-FR; Seals - Silicone, foamed, EPDM.
• Stainless steel housing: Housing - Stainless steel 1.4301 (AISI 304); Seals - EPDM.
• Common: Module housing - PC; Soft keys - TPE; Cable mounting rail - Stainless steel 1.4301 (AISI 304); Display glass - PC-FR; Cable glands - PA (polyamide) V0.

Environment

Ambient temperature

• Non-Ex version: -30 to 70 °C (-20 to 160 °F)
• Hazardous area versions vary by approval and temperature class (T4/T6), with ranges typically from -20 to 55 °C.

Storage temperature

-40 to +80 °C (-40 to 175 °F)

Humidity

10 to 95 %, non-condensating

Degree of protection

IP66/67, NEMA TYPE 4X

Electromagnetic compatibility

According to IEC 61326-1:2012: Interference immunity (Table 2, industrial environments), Interference emission (Class B, residential environments).

Degree of contamination

Pollution degree 3 according to EN 61010-1.

Operability

Local operation

• Display: LCD, FSTN technology, 240 x 160 dots resolution.
• Operating elements: Navigator, 4 soft keys, alarm LED.

Language packages

English (US), German, Chinese (Simplified, PR China), Czech, Dutch, French, Italian, Japanese, Polish, Portuguese, Russian, Spanish, Swedish, Korean. Additional languages may be available via the product structure.

Remote operation

Via HART protocol, PROFIBUS-PA, or FOUNDATION Fieldbus.

Certificates and approvals

Hazardous area approvals

Includes ATEX, NEPSI, CSA, FM, JPN, and EAC approvals, with specific classifications for zones and temperature ratings depending on the version.

Disclaimer

This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror