Contemporary Control Systems MR-SI4 User Manual

Digital Input Module
MR-SI4

110 83913

1. Description

The Modbus module with 4 S0 inputs to DIN EN 62053 -31 class A
was deve lope d for dec entral ized sw itchin g task s. It is suitable for
countin g S0 counter pulses. This allows very good inte gration of the
module into an energy cont rolling system. In case of a power failur e,
the last counter r eadings are saved. The inputs c an be scanned
by means of standard obje cts v ia a Modbus maste r. The module
address, the baud rate and the parity are set by me ans of tw o
address switches on t he front.

Suitab le for de centra lized mounting in serial sub-distributor.

2. Declaration of Conformity

The dev ice was te sted according to the applicab le standards. Con­formit y was proofed. T he declaration of conformity is available at
the manufacturer METZ CONNECT GmbH.

Notes Regarding Device Description

These instructio ns include indic ations for use and m ounting of the
device. In case of questions tha t cannot b e answe red wi th these
instructions please consult supplier or manufacturer.

The indi cated instal lation direc tions or r ules ar e applic able to the
Federal Republic of Ge rmany. If the device is used in other countries
it applies to the e quipme nt inst aller or the user to meet the
national directions.

Safety Instructions

8096/899360

Keep th e applic able direct ions for industr ial safety and preve ntion of
accide nts as we ll as the VDE rule s.

Technicians and/or installer s are informed that they have to
elec tric ally dis charge t hemse lves as presc ribed before installation or
mainten ance of the devices.

Only qualifie d pers onnel shall do mo unting an d installatio n work
with the devices, se e sec tion “qualified pers onnel”.

The information of thes e instr uctions have to b e read and under­stood by ever y person usin g 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

Qualif ied pe rsonnel in the sense of these instructions are per sons
who are well ver sed in the use and installation of such dev ices an d
whose p rofes sional qualifi catio n meet s the re quirem ents of their
work.

This includes for example:

• Qualif icati on to connect th e device according to the V DE
speci fications and the loc al regulations and a qualificat ion to put
this dev ice into operation, to pow er it dow n or to activate it by
respecting the internal directions.

• Knowledge of safet y rule s.

• Knowledge about app lication and us e of the device within the
equipm ent sy stem etc.

3. Technical Data

Modbus Interface

Protocoll Modbus R TU
Transmission rate 1200 ... 115200 Bd
(factory se tting 19200 Bd Even)
Cabling RS485 two wire bus wi th volt age
equalizing cable in bus / line topol ogy
terminate with 120 Ohms

Supply

Operating voltage range 20 ... 28 V AC/ DC (SELV)
Current consump tion 170 mA (AC) / 65 mA (DC)
Relative dut y cycl e 100 %

Input

4x S0 input according to DIN EN 62053-31 Class A

Housing

Dimens ions Wx HxD 1.4 x 2.8 x 3.0 in. (35 x 70 x 65 mm)
Weight 95 g
Mounting position any
Mounting standard rail T H35 per IEC 60715
Mounting in series the ma ximum quantit y of modul es
with out s pace connected in line is limited to 15 or
to a maximum power consumption of
2 Amps ( AC or DC) per conn ection to
the pow er supply. For any similar
block of additional modules a
separate connection to the power
supply is mandatory.
Material
Hous ing Polyamide 6.6 V0
Terminal blocks Polyamide 6.6 V0
Cover plate Polycarbonate
Type of protecti on
(IEC 60529)
Housing IP4 0
Terminal blocks IP20

Terminal blocks

Supply and bus
4 pole terminal block max. AWG 16 (1.5 mm²) sol id wire
max. AWG 18 (1.0 mm²) str anded w ire
Wire diameter min . 0.3 mm up to ma x. 1.4 mm
(terminal block and jumpe r plug are
included to each packing unit)
Module connection
Inp ut /Output max. AWG 12 (4.0 mm²) s olid wire
max. AWG 14 (2.5 mm²) stranded w ire
Wire diameter min . 0.3 mm up to ma x 2.7 mm

Temperature range

Operation -5 °C ... +55 °C
Storage -20 °C ... +70 °C
Protective circuit ry polari ty revers al prote ctio n of
operating voltage
polarity re vers al prote ction of suppl y
and bus

Display

Operating and bus acti vity gree n LED
Error ind ication red LED
Status of the input s yellow LED

4. Wiring Diagram

A1/ +24V

A2/ GND

BUS B+

BUS A-

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

24V

Modbus RTU

5. Connection Diagram

S04-

S04+

24 V AC/DC

+24V

GND

B+

BUS B+

A-

S01-

S01+

on RS-485

GND

BUS A-

S01+

S01
S02+

S02
S03+

RISC - CPU

S03
S04+

S04

S03-

S03+

+24V

GND

B+

A-

S02+

S02-

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

6. Mounting

Power down the equipment.

Mount the module on standard rail ( TH35 pe r IEC 60715 in
junction boxe s and/o r on distr ibution panels).

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

fied persons only, by re spec ting all applic able
specifications and regulations.

Plug in the terminal block for bus connection.

21

Connect the cable for bus supply.

5 mm

43

Mounting in series.

65

The module can be aligne d witho ut inter space. Use the jumper plug
to conne ct bus an d supply volta ge when t he modules are mounted
in seri es.

The max imum qua ntity of modules connecte d in line is limited
to 15 or to a maximum powe r consumption of 2 A mps (AC o r
DC) pe r conne ction to the power suppl y. For any similar block of
additional modules a separate connection to the power supply
is mandatory.

7. Bit rate and Parity setting

The bit rate and parity c an be set in the pro gramming mode wh en
ajumper is plugged behind the front cover of the module. This
jumper is removed in normal mode. A c onnec tion to the bus is not
required during bit rate setting.

The bit rate of the mo dules c an be se t in the following way:

1. r emove the front cover of th e module;

2. plug a jumper to the two middle pins of the 4 pole header
betw een the red and green L ED (Á);

3. set th e desired pari ty and b it rate with the address s witches (Â )
in accordance to the chart b elow.

S03+

S03-

S04+

S04-

x10

x1

BUSY

S02+

+24V

GND

B+

A

-

S02-

24V 24V

+24V

GND

B +

A

-

ERROR

Jumper below

1

the faceplate

A
O

MR-SI4

MODBus RTU

S01+

S01-

4. switch on the supply voltage of t he module; it is now p erman ent­ly savi ng the bit rate in an EEPROM;

5. switch off th e supply voltage of the mo dule;

6. remov e the jump er from t he head er and place the fr ont cove r.

Switch

1 2 3

x10

Parity even odd none

Switch

1 2 3 4 5 6 7 8

x1

Bitrate

1200 2400 4800 9600 19200 38400 57600 115200

(Bit/s)

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

Factory setting: 19200 Bd Even

8. Software Description

8.1 I/O Commands

“02 (0x02) R ead Dis crete I nputs ”

Reque st

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 (0x 04) Read Input R egist ers”

Request

Valid Register Starting Address 20
Valid Quantity of Registers 1

Response

Byte Count 2
(Tabulator kontrollieren )

8.2 Modbus functions

The following f unctions are us ed to read or wri te the registers. The
valid address r anges are indic ated in br acket 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 data ty pes with a length of several re giste rs, these re gisters
are listed dire ctly o ne after the oth er and the one with the highest
value are indicated fir st. This data c an only be transmi tted in com­plete form.

Discrete Inpu ts (Read-O nly)

Address

Name Description

0 – 3 INPUT

Input Register (Read-Only)

Address Name Description

0 – 11 IZ

12 – 19 BZ

20 INPUT Bits 0 -3 contain Discrete Input 0-3

Holding Register

Address Name Description

0 – 11 IT

12 – 19 AZ

20 – 23 IE

24 – 27 WI

Switchi ng stat us of the inputs
(switches are connected),

0: Off (s witch is open), 1: On
(switch is clos ed)

Pulse counter
Data type uint48_t (3 registers ea ch)

Calculated counter reading
Data type uint48_t (2 registers ea ch)

Copy of th e pulse counter af ter hav ing pre ssed
the key
Data type uint48_t (3 registers each) (EEPROM)

Initial count
Data type uint 32_t (2 registers each)
Factor y set ting 0 (EEPROM)

Pulse s per unit
Data type uint16_t (1 re giste r each)
Factor y set ting 1 (EEPROM)

Current conversion factor
Data type uint16_t (1 re giste r each)
Factor y set ting 1 (EEPROM)

(continued) Description of the software

28 – 31 WU

32 – 35 WP

36 – 39 ZS

40 – 43 TA

65 BAUD

8.3 Operating mode for calculation with conversion
factor

In the WP register, there is a code 0…1 that determines, together
with the conver sion fa ctor s WI and WU, the way how they are
included in the c alculation. WP, WI and W U depend on whe ther
the converters are switche d by the co unters, whet her the counter
indicates the consumption in a primary or secon dary way and whe ­ther the emitted puls es correspo nd primarily or s econdarily to the
consumption.

A diffe rence m ust be made bet ween the follo wing el ectricit y meter
types:

Type 1: Directly measur ing coun ter, displ ay: prim ary,
pulse: primar y

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

BZ = (---- -- --- - + AZ ) ∙ WI ∙ WU ,  BZ = counter rea ding = cons umption

Type 2: Conve rsion counter, display: p rimar y, 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

BZ = (---- -- --- - ∙ WI ∙ WU) + AZ , BZ = counter re ading = consumpti on

Type 3: Conve rsion counter, display: p rimar y, pulse: p rimar y

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

BZ = (---- -- --- - + AZ ) ∙ WI ∙ WU , BZ = counter rea ding = cons umption

Voltage conversion factor
Data type uint16_t (1 re giste r each)
Factor y set ting 1 (EEPROM)

Operating mode for calculation with conversion factor
Data type uint16_t (1 re giste r each, on ly bit 0 valid)
Range of v alues 0…1, see bel ow
Factor y set ting 0 (EEPROM)

Format of the counter digit display
Data type uint16_t (1 re giste r each) (EEP ROM)
High by te for counter digi ts,
Range of values 0…9, fac tory s etting 7,
hi gher values are limited to 9
Low by te for pla ces af ter the decimal p oint,
Range of values 0…3, factor y set ting 1,
hi gher values are limited to 3

Flag for key activatio n
Data type uint16_t
(1 register each, f lag in bit 0 only)
0: key is locked,
1: key is operational
factory setting 1 (EEPROM)

Codes f or baud rates and p arity
Factor y set ting 19200 baud, Even Parity (EEPROM)

IZ – IT

IE

IZ – IT

IE

IZ – IT

IE

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