Siemens WTV531-GA5060 Bedienungsanleitung

A6V10844290_en

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Smart Infrastructure

2019-10-21

Meters and Energy Cost Allocation

-bus Level converter 60

WTV531

-GA5060

The level converter WTV531-GA5060 is an interface between M-bus meters and

reader systems. PC software ACT531 reads the data locally or via the Int

ernet

using an optional web server.

●

Connect up to 60 M-bus devices (max. 60 simply M-bus loads)

●

Use up to six level converters on one M-bus network with a max. of 360 simple

M-bus loads

●

Local data read out with the ACT531 PC software via USB or the

RS-232 interface

●

Remote read out via M-bus web server

●

Local data read out via a PXC device via the RS-232 interface

●

Reads a max. 1,000 logical devices on a level converter network

●

Supply voltage AC/DC 24 V

Smart Infrastructure

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2019-10-21

Use

The level converter is the communications interface to read up to

60 M-bus devices (simple M-bus loads).

The data is read out:

●Locally with the ACT531 PC software via USB

●Locally with the ACT531 PC software via the RS-232 interface

●Via the M-bus web server WTV534.., WTV676..

●Via Desigo CC

Up to six level converters can be connected in parallel to a M-bus web server WTV676..

(Master) on a M-bus network.

Up to 60 M-bus devices can be connected to each level converter WTV531... The level

converter can be used:

●As individual components on a M-bus network.

●To extend a M-bus network by up to six level converters connected in parallel.

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

devices by third-party manufacturers.

The level converter is protected against short circuits.

NOTICE

We recommend using a DC 24 V power supply to ensure a stable signal.

Smart Infrastructure

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2019-10-21

Functions

Operating modes

The data can be read in different ways.

Local data read out with the ACT531 software via the USB connection

The level converter is used as the communication interface between M-bus devices and a

laptop using the ACT531 software. The ACT531 software can read a max. of 1,000 logical

devices.

The level converter is operated as the master. The data is read locally via the USB

connection.

A Level converter as master

B Laptop with ACT531 software

Local data read out using the ACT531 PC software via the RS-232 interface

The level converter can also be connected to a laptop via a RS-232 interface.

(6) (6) (6) (6) (7) (7) (7) (7) (8) (9)

M-Bus MASTER Vin

(3) (4)

A B C

(5)(1) (2)

USBActivity

TXD

RXD

M-Bus Error

M-Bus Ready

Power

M-Bus

SLAVE

WEV531-GA5060

A Level converter as master

B Laptop with ACT531 software

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2019-10-21

Remote read out via M-bus web server

The level converter is used as the communication interface between M-bus devices and a

M-bus web server.

The master level converter WTV531(A) is connected to a M-bus web server WTV676.. via

the RS-232 interface (terminals A, B, C).

The following slave level converters (B) can be connected via the M-bus slave connection.

The data can be read via the web server from anywhere on the Internet.

A maximum of 250 devices can be read via M-bus web server WTV676...

Level converter as master

Level converter as slave

NOTICE

The level converter is connected as a slave (B) to the web server (A) (terminals M1M2 of

the web server) if the firmware version of the web server WTV676.. is less than

SIE.WTV676_WI-2.29_FW-3.0-17-2.6.

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Local data read out with Desigo CC via the RS-232 interface

The TX Open module integrates M-bus devices via a RS-232 interface to the Desigo CC

building management platform.

Additional information on the Desigo CC management platform is available in the

engineering guide 'Desigo TM TX Open, TX M-bus', document CM110572. See Section

"Product documentation [➙12]".

TXI2.OPEN

Desigo CC

(6) (6) (6) (6) (7) (7) (7) (7) (8) (9)

M-Bus MASTER Vin

(3) (4)

ABC

(5)

(1) (2)

USBActivity

TXD

RXD

M-Bus Error

M-Bus Ready

Power

M-Bus

SLAVE

WEV531-GA5060

The level converter can be used in various ways.

Up to 60 M-bus devices can be connected to each level converter WTV531...

Smart Infrastructure

A6V10844290_en--_b

2019-10-21

Level converter as individual component

The level converter can be used as an individual component on one M-bus network with up

to 60 devices.

Level converter to extend a M-bus network

The level converter extends a M-bus network with up to six level converters connected in

parallel.

It is connected with a serial connection to the master level converter and in parallel to other

level converters.

A maximum of six level converters can be integrated in parallel and connected to a M-bus

web server WTV676... A maximum of five level converters can be connected in parallel to a

master level converter WTV531.

A maximum of 360 M-bus loads or 1,000 logical devices can be read via the master level

converter.

A Level converter as master

B Level converter as slave

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2019-10-21

Indicators

The level converter has six LEDs on the front side for indicating the

operating state.

USB activity

The LED indicates the USB interface connection state.

●Flashes 2 x -> The device is ready to connect to a PC using a mini USB-B cable.

●Flashes 5 x -> The device is connected to a PC and correctly recognized by it.

TXD

The LED indicates the transmission state on the M-bus master (terminals 6 and 7).

●On -> Data transmitting.

●Off -> No data transmission.

RXD

The LED indicates the receive state on the M-bus master (terminals 6 and 7).

●On -> Data is being received.

●Off -> No data is being received.

M-bus error

The LED indicates the state of the M-bus power supply.

●On -> Bus overload. (short circuit or too many devices on the bus).

●Off -> No faults recognized.

M-bus ready

The LED indicates that bus power is correct and there are no anomalies.

●On -> Bus power is properly polled and sufficient for trouble-free operation.

●Off -> Bus power is insufficient for trouble-free operation.

Power

The 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.

Smart Infrastructure

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2019-10-21

Technical design

Topology

The M-bus permits various network topologies. The devices can be connected to the level

converter in a line, bus, star, or tree topology, or a combination thereof.

Ring topology is not permitted.

Bus cable polarity is not relevant, simplifying installation.

Line topology Bus topology

Star topology Tree topology

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2019-10-21

Combination of topologies

Ring topology

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M-bus

Address

M-bus uses two types of addresses to recognize devices:

●Primary addressing: Up to 250 primary addresses can be assigned to a M-bus system.

The primary address is normally assigned during device commissioning. Pure primary

addressing is not possible if more than 250 devices are read.

●Secondary addressing: Secondary addressing consists of 8 bytes and permits the

assignment of any number. In the default setting, the secondary address for a device

normally matches the serial number issued by the device manufacturer. The assignment

prevents address conflicts on the bus.

Bus expansion

Plant type Maximum

distance Total cable

length Cable cross

section Number of

devices

(slaves)

Max. transmission

rate

Small residential

buildings 350 m 1000 m 0.8 mm2250 9600 baud

Large residential

buildings 350 m 4000 m 0.8 mm2250 2400 baud

64 9600 baud

Small developments 1000 m 4000 m 0.8 mm264 2400 baud

Large developments 3000 m* 5000 m 1.5 mm264 2400 baud

Direct vicinity 5000 m* 7000 m 1.5 mm216 300 baud

Point-to-point

connection 10000 m* 10000 m 1.5 mm21 300 baud

*Shielded cabling required at a distance in excess of 1,000 m (see EN13757-2 appendix E).

Signal specification

M-bus Condition Minimum Typical Maximum Measuring unit

Number simple

M-bus loads per

segment

WTV531-GA5060 0 60

Transfer rate CSegment ≤ 382 nF 300 2400 9600 baud

Bus power (Master) WTV531-GA5060 30 39 40 R

Bus current (master) WTV531-GA5060 0 90 mA

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