Power supply

Operating voltage

AC 110…240 V

AC frequency

47…63 Hz

Power consumption

6 W + 0.07 W for each connected M-bus device

Maximum power consumption

45 W, 45 VA
Vout: DC 24 V, max. 15 VA

Power consumption level converter (in series)

≤3 mA (2 M-bus loads)

Internal fuse

PTC resistance and varistor

Fuse protection of supply line

Circuit breaker

Max. 13 A, type B, C, D as per EN 60898

or

Power supply with current limitation at 10 A

Connections

M-bus master (terminals 9 and 10 on the level converter)

Connections for M-bus devices

and

Connections for the following repeater

M-bus slave (terminals 1 and 2 on the level converter)

Galvanically isolated connections to the M-bus web server or to the previous master level converter if the level converter is used as a repeater.

Vin LC/Vout LC (terminals
11 and 12 on the level converter) /
(terminals 4 and 5 on the power supply)

Power supply for level converter/repeater

Vout 24 Vdc (terminals 6 and 7 on the power supply)

DC 24 V, max. 15 VA

Interface

Serial RS-232 interface (terminals A, B, and C on the level converter)

Galvanically isolated connections

  • Connection to a PC/data logger as master:
    • Terminal A: TX (PC/data logger transmission line)
    • Terminal B: RX (PC/data logger receiving line)
    • Terminal C: GND (interface reference voltage)
  • Connection to an M-bus master WTV776 (or predecessor):
    • Terminal A, RS-232 with terminal A WTV776
    • Terminal B, RS-232 with terminal B WTV776
    • Terminal C, RS-232 with terminal C WTV776

Serial RS-485 interface (terminals D, E, and F on the level converter)

Galvanically isolated connections

  • Connection to a PC/data logger as master:
    • Terminal D: REF (interface reference voltage)
    • Terminal E: D+ (receive/transmission line potential+)
    • Terminal F: D- (receive/transmission line potential-)

M-bus master

Reference standard

EN13757-2 (physical layer)

Baud rate

300 bps…9600 bps

Max. number of M-bus devices per level converter

250 (simple M-bus loads)

Max. number of M-bus devices per level converter network

250 simple M-bus loads

Max. number of level converters in parallel per network

Up to 6 slave level converters

Max. number of serial level converters per network

6 level converters, of which up to 5 repeaters

Bus power

Minimum 30 V

Maximum 42 V

Bus current

Maximum 90 mA

Protection against short circuits

Yes

Galvanic isolation

RS-232 interface. Connection to a PC and connection to a WTV676.

Directives and standards

Product standards

EN 62368-1

Equipment for audio/video, information and communication technology. Safety requirements

Electromagnetic compatibility

For residential and commercial environments

EU conformity (CE)

See EU declaration of conformance *)

Environmental compatibility

The product environmental declaration *) contains data on environmentally compatible product design and assessments (RoHS compliance, materials composition, packaging, environmental benefit, disposal).

*) The documents can be downloaded at http://siemens.com/bt/download.

Protection data

Degree of protection

IP20 as per EN60529

Protection class

II as per EN 62368-1

Ambient conditions

Operation

As per IEC/EN 60721-3-3

Climatic conditions

Class 3K23

Temperature

-5…+50° C

Air humidity

5...95 % r.h.

Mechanical conditions

Class 3M11

Transportation

As per IEC/EN 60721-3-2

Climatic conditions

Class 2K12

Temperature

-40…+70° C

Air humidity

5...95 %

Mechanical conditions

Class 2M4

Storage

As per IEC/EN 60721-3-1

Climatic conditions

Class 1K22

Temperature

-40…+70° C

Air humidity

5...95 %

Mechanical conditions

Class 2M4

Materials and colors

Housing

PC + ASA, RAL 9010 (white)

Dimensions

Length x Width x Height

110 x 71 x 62 mm per device (including terminals)

Weight

Level converter with mounting instructions

0.392 kg for both devices

Packaging

0.055 kg

Mounting

Mounting type

On 35 mm DIN rails (EN60715)