Product overview

Product versions

Table 222. Capabilities of each product

Product name

Capabilities

CMeX10

M-Bus master for up to 32 M-Bus slaves with IR-interface

CMeX11

M-Bus master for up to 64 M-Bus slaves with IR-interface

CMeX10S

M-Bus master for up to 32 M-Bus slaves with IR-interface and RS232 interface

CMeX11S

M-Bus master for up to 64 M-Bus slaves with IR-interface and RS232 interface

CMeX12S

M-Bus master for up to 128 M-Bus slaves with IR-interface and RS232 interface

CMeX13S

M-Bus master for up to 256 M-Bus slaves with IR-interface and RS232 interface


Application description

The CMeX1xS Series makes it possible to expand your CMe Series with up to 256 extra M-Bus slaves. The CMeX1xS Series features standard M-Bus over IR communication and is equipped with the unique IR Pass Through function, making the product series stackable. The modular and expandable design allows the customer to select a suitable level based on price and functionality.

The CMeX10S, CMeX11S, CMeX12S and CMeX13S also add the RS232 interface to use with any standard RS232 communicating device.

The CMeX1xS Series fits into almost any kind of meter collection system. For example:

  • With CMe Series to expand your M-Bus master to handle up to 256 M-Bus slaves

  • Standalone M-Bus master from RS232 to M-Bus 2-wire

  • Split M-Bus 2-wire bus between two M-Bus masters with galvanic isolation using the IR- Pass Through

Features

Power on

When powered on, the CMeX10 Series product has an internal boot time before the product can be used. The boot time depends on the numbers of M-Bus slaves connected to the bus. The maximum boot time is approximately 10 seconds. During boot the ERR LED (red) is permanently on.

Normal operation/Idle

In normal operation, ERR LED (red) is off and PWR LED (green) is on. During normal communication, TX LED will flash when communication takes place from the DTE to the M-Bus 2-wire bus, and vice versa on the RX LED when M-Bus slave devices transmitting data back to the DTE.

Light collision detect (25 mA to 500 mA)

When the product detects a light slave collision, i.e. during secondary addressing, the product will send a break signal of 45 ms on the M-Bus 2-wire bus and to the right IR interface. The product will also send a break signal (45 ms), garbage characters (200 ms) and a break signal (45 ms) again to the DTE (left IR interface and RS232 interface). This procedure makes it possible to detect slave collisions in the DTE even if the used bearer does not support break signalling, i.e. TCP/IP communication.

Heavy collision detect and short circuit (>500 mA)

When the product detects a heavy collision, i.e. during secondary addressing or short circuit of the bus, the product will turn off the bus for 0.5 seconds. The product will also send a break signal of 45 ms to the right IR interface and a break signal (45 ms), garbage characters (200 ms) and a break signal (45 ms) again to the DTE (left IR interface and RS232 interface).

High idle current

When the M-Bus 2-wire bus is in idle state and the idle current is too high (depending on CMeX10 Series model), the product will turn off the M-Bus 2-wire interface and restart. The ERR LED (red) will be permanently on during this state. This procedure will continue until the idle current is within acceptable level for the CMeX10 Series model.

Parts overview

CMex10-11_parts_overview_1_.png
CMeX10-11_parts_overview_2_.png

CMeX10, CMeX11

  1. Serial number

  2. M-Bus out

  3. DIN-rail lock

  4. IR interface

  5. Power supply N

  6. Power supply L

  7. Power LED (green)

  8. Error LED (red)

  9. Serial number

  10. RX LED (yellow)

  11. TX LED (yellow)

CMeX13S_parts_overview_1.jpg
CMeX13S_parts_overview_2.jpg

CMeX10S, CMeX11S, CMeX12S, CMeX13S

  1. M-Bus out

  2. M-Bus out

  3. RS232 in

  4. DIN-rail lock

  5. IR interface

  6. M-Bus out

  7. Ground

  8. Power supply N

  9. Power supply L

  10. Power LED (green)

  11. Error LED (red)

  12. Serial number

  13. RX LED (yellow)

  14. TX LED (yellow)

LED indications

Table 223. PWR LED (green) indicates mains supply

Mode

Description

Visual

Permanently on

Mains power connected

LED_indications_green_3_.png

Permanently off

No mains power connected

LED_indications_blank_.png

Table 224. ERR LED (red) indicates M-Bus 2-wire bus status

Mode

Description

Visual

Permanently on

Short circuit of the M-Bus 2-wire bus

LED_indications_red_2_.png

Permanently off

Normal mode, Idle

LED_indications_blank_.png

Short flash every second

No M-Bus slaves connected

RED_LED_short_flash_every_second_.png

Flashing for one second

M-Bus slave collision

LED_RED_M-Bus_slave_collision_.png

Table 225. RX LED (yellow) indicates communication from M-Bus slave to DTE

Mode

Description

Visual

On/Flashing

M-Bus slave is transmitting data

LED_indications_yellow_2_.png

Off

M-Bus slave is not transmitting data

LED_indications_blank_.png

Table 226. TX LED (yellow) indicates communication from DTE to M-Bus slaves

Mode

Description

Visual

On/Flashing

DTE is transmitting data

LED_indications_yellow_2_.png

Off

DTE is not transmitting data

LED_indications_blank_.png

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