Sinapsi EQUOBOX SIN.EQLC250 Manuel utilisateur

S I N AP S I S . r . l .

V i a d e l l e Q u e r c e 1 1 / 1 3

0 6 0 8 3 B a s t i a U m b r a ( P G ) I t a l y

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w w w . s i n a p s i t e c h . i t |i n f o @ s i n a p s i t e c h . i t

EQUOBOX SIN.EQLC250

M-Bus Level Converter

Adapter/Repeater

User Guide

Rev 1.0

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TABLE OF CONTENTS 
M-BUS OVERVIEW ........................................................................................................................................... 3 
1 DESCRIPTION of the M-Bus System ..................................................................................................... 3 
2 Addressing............................................................................................................................................... 3 
3 Sizing the M-Bus System ....................................................................................................................... 4 
4 BUS signal specifications ....................................................................................................................... 4 
SIN.EQLC250 INSTALLATION ......................................................................................................................... 5 
1 Description of the SIN.EQLC250 ........................................................................................................... 5 
2 Operating modes of power supply ...................................................................................................... 6 
3 Connection terminals............................................................................................................................. 7 
4 Topology and connection of the M-Bus network............................................................................... 8 
5 SIN.EQLC250 operation modes ............................................................................................................ 9 
6Status LED.............................................................................................................................................. 10 
7 Short circuit protection........................................................................................................................ 10 
8 Firmware update .................................................................................................................................. 11 
Troubleshooting............................................................................................................................................ 12 
Technical features......................................................................................................................................... 13 
 
 

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1. M-BUS OVERVIEW

1.1 DESCRIPTION of the M-Bus System

The M-Bus (Meter Bus) system is a communication protocol compliant with the EN13757-2 standard.

The M-Bus System provides the following advantages:

•High level of data transmission security

•Low wiring costs

•Long distances without requiring repeaters

•Large number of central units

•Detection of both battery-powered and mains-powered devices

•Automatic device recognition

•Vast array of systems and components available

•Different types of bus topology: linear, star, and tree

Figure 1 - Bus topologies

1.2 Addressing

The M-Bus uses two types of addressing modes to detect the devices:

•Primary address: up to 250 primary addresses can be allocated within an M-Bus plant. The

primary address is normally allocated while setting up the central units.

•Secondary address: the secondary address consists of 8 bytes and allows the allocation of any

number. By default, the secondary address of the devices is the same as the manufacturer

serial number. This type of allocation prevents bus conflicts.

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1.3 Sizing the M-Bus System

Cable type

•Shielded telephone cable 0.5mm²

•Cable maximum capacitive load: 152 nF/km

If you are using a cable with lower section, adapt the maximum length and the number of slaves

Follow the instructions provided in the table to size the M-Bus system

Type of plant

Maximum

distance

Overall cable

length

Cross-section

Number of

devices

(slaves)

Max.

transmission

rate

Small residential

buildings

350 m

1000 m

0.8 mm2

250

9600 Baud

Large residential

buildings

350 m

4000 m

0.8 mm2

250

2400 Baud

9600 Baud

Small complex

1000 m

4000 m

0.8 mm2

2400 Baud

Large

developments

…3000 m*

5000 m

1.5 mm2

2400 Baud

Direct vicinity

…5000 m*

7000 m

1.5 mm2

300 Baud

Point-to-point

connection

…10000 m*

10000 m

1.5 mm2

300 Baud

*Shielded cabling required at a distance in excess of 1000 m (see EN13757-2).

1.4 BUS signal specifications

M-Bus system

u.m.

Condition

Minimum

Typical

Maximum

Unit of

measure

ment

Number of devices per

segment

SIN.EQLC250

250

Transmission rate





300

2400

9600

Bus Voltage (Master)

IM=0…400mA

Bus Voltage (slave)

US,R

 

Bus current (Master)

IM,V

SIN.EQLC250

375

Current (slave)

IS,R

US=30…42V

0.75

1.2

1.5

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2. SIN.EQLC250 INSTALLATION

2.1 Description of the SIN.EQLC250

SIN.EQLC250 is a unit that reads M-Bus devices in compliance with the EN 13757-2 standard.

The level converter/repeater SIN.EQLC250 is the interface between M-Bus device and a read system.

It consists of a level converter and the associated power supply. In fact, the level converter and

associated power supply form a unit: no addition transformer or auxiliary power required.

The SIN.EQLC250 unit can be used in different ways:

•Connect up to 250 M-Bus devices (max. 250 simply M-Bus loads (*))

•Can be connected with the M-Bus web server of Equobox family (SIN.EQRTUEVO1T, SIN.EQRTU1,

SIN.EQRTU1T, SIN.EQRTU1X, SIN.EQRTU4), PXC devices, other M-Bus read / configuration systems

•Up to 6 level converters connected in parallel on an M-Bus network

•Up to 5 level converters as repeater (in series) on an M-Bus network

•Via RS-232 or RS-485 interfaces to read device data via the PXC device or a PC (level converter)

•Remote reading of M-Bus devices via M-Bus web server SIN.EQRTUEVO1T (Cloud).

*A unit M-Bus load is ≤1,5mA

NOTE: You can use the level converter at your own risk as an interface as well to suitable software and

devices by third-party manufacturers.

NOTE: The level converter is galvanically isolated. It protects against short circuits.

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2.2 Operating modes of power supply

The power supply can be employed as follows:

•To power the level converter

Level converter / repeater

Power supply

•To power the M-Bus web server SIN.EQRTUxxx (*).In the example below there is the datalogger

SIN.EQRTUEVO1T.

Web server SIN.EQRTUxxx.

Connection web server SIN.EQRTUxxx with

auxiliary power supply (24Vdc) of SIN.EQLC250

Level converter/repeater SIN.EQLC250

Connection level converter/repeater with

power supply

* SIN.EQRTUxxx: SIN.EQRTU1, SIN.EQRTU4, SIN.EQRTU1T, SIN.EQRTU1X, SIN.EQRTUEVO1T

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2.3 Connection terminals

SIN.EQLC250 looks like a device for mounting on DIN rail. The connectors/LEDs present are listed

below:

Figure 2 –Features and connectors Level Converter (SIN.EQLC250)

Main voltage AC 230 V

Power supply for level converter

(1) –Pin 1 for main power –230 Vac

(2) –Pin 2 for main power –230 Vac

(4) –power supply = (11) level converter

(5) –power supply = (12) level converter

Power out 24Vdc for web server (15W)

Electrical grounding

(6) - Pin V+ Output for datalogger

(7) - Pin V- Output for datalogger

(3) - Earth

Serial interface

Firmware update button

Serial interface RS232 and RS485 to connect

to a PC or M-Bus master.

Push button for reset and firmware update

RS-232:

A = TX

B = RX

C = GND

RS-485:

D = REF

E = D-

F = D+

M-Bus Slave

M-BUS Master interface

(1) –Pin 1 for M-Bus network to extend

(Repeater mode)

(2) –Pin 2 for M-Bus network to extend

(Repeater mode)

(9) –Pin 1 for connection M-Bus devices

(Master mode)

(10) –Pin 2 for connection M-Bus devices

(Master mode)

Status LED

Ref. Chap 2.6

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2.4 Topology and connection of the M-Bus network

M-Bus technology allows good freedom of choice regarding network topology. It is possible to connect

the devices present in the plant according to a star, linear, tree topology or mixed as seen in 3 and 4.

However, ring topology (Figure 5 –Ring topology NOT ALLOWED) is not allowed. It is also not necessary

to observe any polarity of the bus, thus simplifying installation.

Figure 3 –Star Topology

Figure 4 –Mixed Topology

Figure 5 –Ring topology NOT ALLOWED

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2.5 SIN.EQLC250 operation modes

SIN.EQLC250 can be used with M-Bus communication interface for SIN.EQRTUxxx datalogger (Figure 6)

or with a PC with EQUOBOX TOOLKIT software (SIN.EQSW1) (Figure 7) or as a repeater/extender of an

M-Bus network (Figure 8). The following figures show the connection diagrams for the different

operation modes.

Figure 6 –M-Bus communication interface for SIN.EQRTUxxx datalogger

Figure 7 –Connection a PC with EQUOBOX TOOLKIT software (SIN.EQSW1)

Figure 8 –Repeater/extender of an M-Bus network

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2.6 Status LED

There are 6 LEDs present on the SIN.EQLC250 device, which indicate the operating status as shown in

the figure:

Figure 9 - Status indicators

Run

The (green) LED indicates the operational state of the device.

●Blinking at 1 Hz (slow) -> Device functions are being set up. No communication.

●Blinking at 10 Hz (fast) -> Device update pending.

●On -> The device is operational.

TX M-Bus

The (green) LED indicates the transmission state on the M-Bus network (terminals 9 and 10).

●On -> Data is transmitting.

●Off -> No data is transmitting.

RX M-Bus

The (orange) LED indicates the receive state of data on the M-Bus network (terminals 9 and 10).

●On -> Data is being received.

●Off -> No data is being received.

Short Circuit

The (red) LED indicates a short circuit on the bus, very high traffic, or a collision.

Overload

The (orange) LED indicates a bus overload that may prevent correct operation.

●On -> Bus overload that detected.

●Off -> No bus overload detected.

Power

The (green) LED indicates the state of the level converter power supply.

●On -> The device power supply is correct.

●Off -> Device power is not correct or unavailable.

2.7 Short circuit protection

During normal operation of the level converter, if a data collision occurs during communication with

the meters on the "M-Bus Master" bus, the "Short Circuit" LED may turn on.

In the case instead of a real c.c. (short circuit) in the absence of communication, the "M-Bus Master"

bus is disconnected (∆VM-Bus = 0) for a time equal to:

-5 seconds to the first short circuit detected.

-60 seconds per second consecutive short circuit detected.

-5 minutes to the third consecutive short circuit.

-24 hours from the fourth attempt onwards until the short circuit situation is resolved.

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