CMeX20

CMeX20 – External MCM for ABB B21/B23/B24

CMeX20 is an external meter connectivity module used to collect meter data from an ABB B21/B23/B24 electricity meter and deliver it to a receiving system by M-Bus. The MCM communicates with the ABB meter through IR and will initiate collection of data immediately after start-up. CMeX20 has a modular design, which makes it easy to extend an existing installation if needs are changing.

READY TO USE

• The CMeX20 is ready to use with no configuration required in the
  field. It can be connected to a CMe Series master, or any M-Bus
  master following the M-Bus standard.

STANDARD OPEN PROTOCOLS

• The standard open protocol design works with any software
  supporting the M-Bus standard. It allows any existing M-Bus
  system to use the product without any proprietary solutions.

FLEXIBLE

• The CMeX Series contains modules with various functions to meet a great
  variety of customer demands. The series contains for example I/O modules
  and D/A modules to read input signals or control output signals.

COST EFFECTIVE

• The modular and expandable design allows the customer to select a
  suitable level based on price and functionality. The low initial cost and the
  possibility to add modules to existing installations provide a future proof
  solution.

Mechanics

• Casing material – Polyamide
• Protection class – IP20
• Dimensions (w x h x d) 35 x 90 x 65 mm (2 DIN modules)
• Weight – 100 g
• Mounting – Mounted on DIN rail (DIN 50022) 35 mm

Electrical connections

• Supply voltage – From M-Bus
• Connection M-Bus – Screw terminal 0.25-1.5 mm²

Electrical characteristics

• Nominal voltage – 21-42 VDC through M-Bus connection, independent of wiring polarity
• Unit loads – 3 mA M-Bus 2T

Environmental specifications

• Operating temperature  –  -20 °C to +55 °C
• Operating humidity – max 80 % RH at temperatures up to 31 °C, decreasing linearly to 50 % RH at 40 °C
• Operating altitude – 0-2000 m
• Pollution degree – Degree 2
• Usage environment – Indoors, can be extended with IP67 enclosure for outdoor use
• Storage temperature –  -40 °C to +85 °C

User interface

• Orange LED – Power/M-Bus activity

M-Bus

• Interfaces – IR, M-Bus slave

M-Bus slave interface

• M-Bus standard – EN 13757
• M-Bus baud rate – 300 and 2400 bit/s
• Addressing modes – Electricity meter’s secondary address
• M-Bus information – All fields in the first telegram of the electricity meter

Manuals:

• CMeX20 Quick Manual English