EM340

Specification are subject to change without notice EM340 DS 100316

4

Output specifications

RS485 serial port

RS485 by screw

connection.

Function

For communication

of measured data,

programming parameters

Protocol

ModBus RTU (slave

function)

Baud rate

9.6, 19.2, 38.4, 57.6, 115.2

kbaud,

Data format

even or no parity,

Address

1 to 247 (default: 01)

Driver input capability

1/8 unit load. Maximum 247

devices on the

same bus.

Data refresh time

1sec

Read command

50 words available in 1

read command

Rx/Tx indication

Rx segment on display

is shown when a valid

Modbus command is sent

to that specific meter

Tx segment on display

is shown when a valid

Modbus reply is sent back

to the master

M-bus port

M-bus by screw

connection.

Function

For communication of

measured data

Protocol

M-bus according to

EN13757-1

Baud rate

0.3, 2.4, 9.6 kbaud

Meters in the M-bus network

250

Primary address

Selectable

Secondary address

Univocally defined in each

unit

Identification number range from 9000 0000 to 9999

9999

Other

Available functions: wild

card, header, initialisation

SND_NKE, and req_udr

management. Management

of primary address

modification via M-bus and

reset of partial energy via

M-bus available.

VIF, VIFE, DIF and DIFE:

see protocoll

Static output

Purpose

For pulse output

proportional to the active

energy (kWh)

Pulse rate

Selectable in multiple of

100

Max 500 or 2000 kWh

according to pulse ON

duration

Digital input specifications

Input specifications (cont.)

power factor if inductive

or PF>0.996 (<5°) if

capacitive

- a current at least equal to

10% rated current (primary

current transformer)

Digital inputs

Free of voltage contact

Function

Tariff management (switch

between t1-t2)

Number of inputs

1

Contact measurement voltage 5 V

Input impedance

1kohm

Contact resistance

≤1kohm, close contact

≥100kohm, open contact

Overload

In case a voltage is

erroneously applied to the

digital input, the input is not

damaged up to 30 VAC/

DC.