Metz Connect MR-SI4, MR-DI10 User Manual

METZ CONNECT GmbH | Im Tal 2 | 78176 Blumberg | Germany | Phone [phone] | Fax [phone]
Mounting instruction see www.metz-connect.com

1. Description

The Modbu s module with 4 S0 inpu ts to DIN EN 62053-31 class A
was devel oped for decentr alized switchin g tasks. It is suit able for
counting S0 c ounter pulses. T his allows very g ood integration of t he
module into a n energy controll ing system. In ca se of a power failure,
the last co unter readings are s aved. The inputs c an be scanned
by means of st andard object s via a Modbus maste r. The module
address , the baud rate and the p arity are set by me ans of two
address s witches on the fr ont.

Suitable f or decentralize d mounting in seria l sub-distribu tor.

2. Declaration of Conformity

The devi ce was tested accor ding to the applicab le standards. Co n­formit y was proofed. The de claration of confo rmity is availabl e at
the manufacturer METZ CONNECT GmbH.

Notes Regarding Device Description

These in structions inc lude indications f or use and mounting of th e
device. In c ase of questions t hat cannot be answe red with these
instructions please consult supplier or manufacturer.

The indic ated installati on directions or r ules are applica ble to the
Federa l Republic of Germa ny. If the device is use d in other countrie s
it applie s to the equipment ins taller or the use r to meet the
national directions.

Safety Instructions

Keep the ap plicable direc tions for industr ial safety and pr evention of
accident s as well as the VDE rul es.

Technician s and/or installe rs are informed th at they have to
elect rically dischar ge themselves a s prescribed be fore installati on or
maintenan ce of the devices.

Only quali fied personn el shall do mounting an d installation wo rk
with the de vices, see se ction “qualifie d personnel”.

The inform ation of these ins tructions have to b e read and under­stood by e very person us ing this device.

Symbols

Warning of dangerous electrical voltage

Danger

means that non-observance may cause risk of life,
grievous bodily harm or heavy material damage.

Qualified Personnel

Qualifi ed personnel in t he sense of these i nstructions ar e persons
who are wel l versed in the use a nd installation of s uch devices and
whose pro fessional quali fication meet s the requireme nts of their
work.

This includes for example:

• Qualifi cation to co nnect the device a ccording to the VDE
specif ications and the loc al regulations and a qu alification to put
this devi ce into operation, to po wer it down or to activ ate it by
respecting the internal directions.

• Knowle dge of safety rule s.

• Knowle dge about applicat ion and use of the devic e within the
equipme nt system etc.

3. Technical Data

Modbus Interface

Protocol l Modbus RT U
Transmissio n rate 1200 ... 115200 Bd
(factor y setting 19200 Bd Even)
Cabling RS485 t wo wire bus with volt age
equalizin g cable in bus / line topo logy
terminate with 120 Ohms

Supply

Operati ng voltag e range 20 ... 28 V AC/D C (SELV)
Current co nsumption 170 mA (AC) / 65 mA (DC )
Relativ e duty cycle 100 %

Input

4x S0 input acc ording to DIN EN 62053-31 Cla ss A

Housing

Dimensio ns WxHxD 1.4 x 2.8 x 3.0 in. (35 x 70 x 65 mm)
Weight 95 g
Mounting position any
Mounting standar d rail TH35 per IEC 60715
Mounting in s eries the max imum quantity of modu les
witho ut space connec ted in line is limited to 15 or
to a maxim um power consumptio n of
2 Amps (A C or DC) per connec tion to
the powe r supply. For any similar
block of a dditional module s a
separate connection to the power
supply is ma ndatory.
Material
Housing Po lyamide 6. 6 V0
Terminal blocks Polyamide 6.6 V0
Cover plate Polycarbonate
Type of prote ction
(IEC 60529)
Housing IP40
Terminal blocks IP20

Terminal blocks

Supply and b us
4 pole terminal bloc k max. AWG 16 (1.5 mm²) solid w ire
max. AWG 18 (1.0 mm²) stran ded wire
Wire diame ter min. 0.3 mm up to ma x. 1.4 mm
(terminal b lock and jumper plug ar e
include d to each pack ing unit)
Module connection
Input/Ou tput max. AWG 12 (4.0 mm²) so lid wire
max. AWG 14 (2.5 mm ²) stranded wire
Wire diame ter min. 0.3 mm up to ma x 2.7 mm

Temperature range

Operati on -5 °C ... +55 °C
Storage -20 °C ... +70 °C
Protec tive circuitry polarit y reversal prote ction of
operating voltage
polarit y reversal prot ection o f supply
and bus

Display

Operati ng and bus activit y green LED
Error indic ation red LED
Status of the i nputs yellow L ED

5. Connection Diagram

24 V AC/DC

GND

BUS B+

BUS A-

GND

B+

A-

+24V

B+

A-

S04-

+24V

GND

S04+

S03-

S03+

S01+

S01-

S02+

S02-

4. Wiring Diagram

A1/ +24V

A2/ GND

BUS B+

BUS A-

24V

RISC - CPU

24V AC / 170mA
24V DC / 65mA

S01+

S01

S04+

S04

S02+

S02
S03+

S03

Modbus RTU

on RS-485

Digital Input Module
MR-SI4

110 8 3 913

8096/899360

21

6. Mounting

Power down th e equipm ent.

Mount the mo dule on standard ra il (TH35 per IEC 60715 in
junctio n boxes and/or on dis tribution pane ls).

Installation
Electric installation and device termination shall be done by quali-

fied per sons only, by respe cting all applic able
specifications and regulations.

Plug in the terminal block for bus connection.

43

5 mm

65

The modul e can be aligned wit hout interspac e. Use the jumper plug
to connec t bus and supply volt age when the modul es are mounted
in serie s.

The maxi mum quantity of mod ules connected i n line is limited
to 15 or to a maximu m power consumptio n of 2 Amps (AC or
DC) per co nnection to the po wer supply. For any sim ilar block of
additional modules a separate connection to the power supply
is mandatory.

Connec t the cable f or bus supp ly.

Mounting in series.

7. Bit rate and Parity setting

The bit rate a nd parity can be s et in the programmin g mode when
ajumper is p lugged behind th e front cover of the mod ule. This
jumper is re moved in normal mo de. A connection to t he bus is not
required during bit rate setting.

The bit rate o f the modules can be s et in the followin g way:

1. re move the fro nt cover of the module;

2. plug a jumpe r to the two middle pin s of the 4 pole header
betwe en the red and green L ED (Á);

3. set the de sired parity an d bit rate with the addre ss switches (Â )
in accordan ce to the chart below.

If the settings differ from the settings specified in the chart the factory
setting applies.

Factory setting: 19200 Bd Even

Switch

x1

1 2 3 4 5 6 7 8

Bitrate

(Bit/s)

1200 2400 4800 9600 19200 38400 57600 115200

Switch

x10

1 2 3

Parity even odd none

4. switch o n the supply voltage o f the module; it is now per manent-

ly saving t he bit rate in an EEPROM;

5. switch o ff the supp ly voltage of the mod ule;

6. remove th e jumper from the hea der and place the front c over.

S02+

S02-

S03+ S03-

S04+

S01+

24V 24V

ERROR

1
A
O

B +

A

-

MR-SI4

B+

A

-

+24V

GND

+24V

GND

BUSY

MODBus RTU

x1

x10

Jumper below
the faceplate

S04-

S01-

METZ CONNECT GmbH | Im Tal 2 | 78176 Blumberg | Germany | Phone [phone] | Fax [phone]
Mounting instruction see www.metz-connect.com

8. Software Description

8.1 I/O Commands

“02 (0x02) Re ad Discrete Input s”

Reques t

Valid Input Starting Address 0 .. 3
Valid Quantity of Inputs 1 .. 4

Response

Byte Count 1
Input Status Bit0 .. Bit3 ( Bit4 .. Bit7 = 0 )

Information

1 = Status Input closed
0 = Status Input open

“04 (0x0 4) Read Input Regis ters”

Request

Valid Register Starting Address 20
Valid Quantity of Registers 1

Response

Byte Count 2
(Tabulator kontrollieren )

8.2 Modbus functions

The follo wing functions ar e used to read or wri te the register s. The
valid addr ess ranges are ind icated in bracket s.

Read Input Registers (0-20)
Read Holding Registers (0-43)
Write Single Register (20-43)
Write Single Register (65)
Write Multiple Registers (0-43)

For long dat a types with a le ngth of several re gisters, the se registers
are liste d directly one af ter the other and th e one with the highes t
value are in dicated first . This data can only b e transmitted in co m­plete form.

Discret e Inputs (Read- Only)

Address

Name Description

0 – 3 INPUT

Switching s tatus of the input s
(switches are connected),

0: Off (sw itch is open), 1: On
(switch is c losed)

Input Register (Read-Only)

Address Name Description

0 – 11 IZ

Pulse counter
Data typ e uint48_t (3 regi sters each)

12 – 19 BZ

Calculated counter reading
Data typ e uint48_t (2 regi sters each)

20 INPUT Bits 0-3 c ontain Discret e Input 0-3

Holding Register

Address Name Description

0 – 11 IT

Copy of the pu lse counter afte r having presse d
the key
Data typ e uint48_t (3 regis ters each) (EEPRO M)

12 – 19 AZ

Initial count
Data typ e uint32_t (2 regist ers each)
Factor y setting 0 (EEPROM )

20 – 23 IE

Pulses p er unit
Data typ e uint16_t (1 register eac h)
Factor y setting 1 (EEPROM )

24 – 27 WI

Current conversion factor
Data typ e uint16_t (1 register eac h)
Factor y setting 1 (EEPROM )

(continued) Descripti on of the sof tware

28 – 31 WU

Voltage conversion factor
Data typ e uint16_t (1 register eac h)
Factor y setting 1 (EEPROM )

32 – 35 WP

Operating mode for calculation with conversion factor
Data ty pe uint16_t (1 register eac h, only bit 0 valid)
Range of val ues 0…1, see below
Factor y setting 0 (EEPROM )

36 – 39 ZS

Format of th e counter digit displ ay
Data typ e uint16_t (1 register eac h) (EEPROM)
High byte f or counter digits ,
Range o f values 0…9, factory s etting 7,
highe r values are limite d to 9
Low byte f or places after t he decimal point,
Range o f values 0…3, factor y setting 1,
highe r values are limite d to 3

40 – 43 TA

Flag for key a ctivation
Data typ e uint16_t
(1 register e ach, flag in bit 0 only )
0: key is locke d,
1: key is operati onal
factor y setting 1 (EEPRO M)

65 BAUD

Codes for b aud rates and parit y
Factor y setting 19200 baud, Eve n Parity (EEPROM)

8.3 Oper ating mod e for calcu lation wit h convers ion
factor

In the WP re gister, there is a code 0…1 that de termines, toge ther
with the co nversion facto rs WI and WU, the way how t hey are
include d in the calculation . WP, WI and WU dep end on whether
the conver ters are switc hed by the counter s, whether the cou nter
indicate s the consumption in a p rimary or secon dary way and whe ­ther the em itted pulses co rrespond prima rily or secondar ily to the
consumption.

A differ ence must be made be tween the follo wing electri city meter
types:

Type 1: Direc tly measuring cou nter, display: prima ry,
pulse: primary

Note: Indicates the actual consumption
Species: DIN rail counter with mechanical drum-type counting

mechanism, Ferraris counter
Type of formula: WP = 0
Factors: WI = WU = 1

IZ – IT

BZ = (------- --- + A Z) ∙ WI ∙ WU ,  BZ = counter re ading = cons umption

IE

Type 2: Conver sion counter, display : primary, pulse: s econdary

Note: Indicates the actual consumption
Species: Counter with LCD display
Type of formula: WP = 1
Factors: WI and WU correspond to the converters

IZ – IT

BZ = (------- --- ∙ W I ∙ WU) + AZ , BZ = counter re ading = consu mption

IE

Type 3: Conver sion counter, display : primary, pulse: p rimary

Note: Indicates the actual consumption
Species: Counter with LCD display, multi-function meters
Type of formula: WP = 0
Factors: WI = WU = 1

IZ – IT

BZ = (------- --- + A Z) ∙ WI ∙ WU , BZ = counter re ading = cons umption

IE