Lumel SM3 User manual

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2-CHANNEL MODULE
of LOGIC or COUNTER
INPUTS
SM3 TYPE
USERS MANUAL
Microlectra bv.
www.microlectra.nl [email protected]

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CONTENTS
1. APPLICATION .............................................................................5
2. MODULE SET .............................................................................6
3. BASIC REQUIREMENTS, OPERATIONAL SAFETY .................7
4. INSTALLATION ...........................................................................9
 4.1. Module mounting ..................................................................9
 4.2. Terminal description ............................................................10
5. SERVICE ...................................................................................12
 5.1. Description of the MODBUS protocol implementation ........13
 5.2. Description of the MODBUS protocol functions ..................13
 5.3. Map of module registers .....................................................16
 5.4. Set of module registers .......................................................17
6. IMPULSE COUNTER ................................................................26
 6.1. Main counter .......................................................................26
 6.2. Auxiliary counter .................................................................26
7. CONFIGURATION of IMPULSE INPUTS .................................27
 7.1. Active state .........................................................................27
 7.2. Active state duration ...........................................................27
 7.3. Impulse weight ....................................................................28
 7.4. Default parameters .............................................................29
8. TECHNICAL DATA ....................................................................30
9. BEFORE a DAMAGE WILL BE DECLARED ...........................32
10. ORDERING CODES ..................................................................32
11. MAINTENANCE AND GUARANTEE ........................................33

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1. APPLICATION
nModule of logic inputs
The SM3 module of two logic inputs is destined to collect logic states of logic
inputs and make them accessible to computer-based industrial systems working
on the base of the RS-485 interface.
The module has 2 logic inputs and RS-485 interface with MODBUS RTU and
ASCII transmission protocols.
RS-485 and RS-232 ports are galvanically isolated from input signals and
supply.
The module programming is possible by means of the RS-485 or RS-232 port.
In the SM3 module set there is a connecting cable to connect with the PC
computer (RS-232).
Module parameters:
- two logic inputs,
- RS-485 communication interface with MODBUS RTU and ASCII transmission
protocols to operate in computer-based systems with the optical transmission
signalling based on LED diodes,
- configurable baud rate: 2400, 4800, 9600, 19299, 38400 bit/s.
nModule as an impulse converter.
The SM3 module working as an impulse converter is destined to add measuring
devices equipped with impulse inputs, e.g. watt-hour meters, heat-meters, gas-
meters, flow transducers a.s.l., to computer systems. Then, the SM3 converter
enables the remote readout of the counter state in automatized accounting
systems.
The converter has 2 impulse inputs and RS-485 interface with MODBUS RTU
and ASCII transmission protocols, what enables its application in computer
systems with LUMEL-3000, Wizcon, Fix, In Touch, Genesis 32 (Iconics) and
other visualization programs.
Converter parameters:
two impulse inputs, independently configured:
- programmable active state of inputs (high level or low level of the input
voltage),
- programmable filter for input impulses with level of defined duration time
(separately for high and low level),
- impulse counting up to the value 4.294.967.295 and with protection
against erasing from the application level,
- auxiliary impulse counters with the possibility of erasing in any time,
- non-volatile registers storing the weight of counted impulses,

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Fig. 1 View of the
SM3 module
- 4 separate registers containing the result of the counter value divisions with
weight values of counted impulses,
RS-485 communication interface with MODBUS RTU and ASCII transmission
protocols to work in computer systems with optical transmission signalling on
LED diodes,
configurable baud rate: 2400, 4800, 9600, 19200, 134800 bit/s,
programming interface on the frontal plate of RJ type (TTL levels),
several ways of transmission parameter configuration:
- programmed  by means of the programming interface RJ on the frontal
plate,
- programmed  from the application level, by means of the RS-485 bus,
storage of the counter state in the non-volatile memory together with the CRC
checksum,
counting of supply decays,
detection of emergency states.
2. MODULE SET
SM3 module .............................................. 1 pc
users manual ............................................ 1 pc
guarantee card .......................................... 1 pc
hole plug of the RS-232 socket ................. 1 pc
RS-232 cable to connect with the
1 pc computer (1.5 m) ............................... 1 pc
When unpacking the module, please check the delivery
completeness and whether the type and version code
on the data plate correspond to the order.

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3. BASIC SAFETY REQUIREMENTS, OPERATIONAL SAFETY
Symbols located in this service manual mean:
WARNING!
Warning of potential, hazardous situations. Especially impor-
tant. One must acquaint with this before connecting the module.
The non-observance of notices marked by these symbols can
occasion severe injuries of the personnel and the damage of the
instrument.
CAUTION!
Designates a general useful note. If you observe it, handling of
the module is made easier. One must take note of this, when the
module is working inconsistently to the expectations.
Possible consequences if disregarded !
In the security scope the module meets the requirements of the EN 61010 -1
standard.
Remarks concerning the operator safety:
1. General
The SM3 module is destined to be mounted on a 35 mm rail.
Non-authorized removal of the required housing, inappropriate use, incorrect
installation or operation creates the risk of injury to personnel or damage to
equipment. For more detailed information please study the users manual.
Do not connect the module to the network through an autotransformer.
All operations concerning transport, installation, and commissioning as well as
maintenance must be carried out by qualified, skilled personnel and national
regulations for the prevention of accidents must be observed.
According to this basic safety information, qualified, skilled personnel are
persons who are familiar with the installation, assembly, commissioning, and
operation of the product and who have qualifications necessary for their
occupation.
The RS-232 socket serves only to connect devices (Fig. 5) working with the
MODBUS Protocol. Place a hole plug in the RS-232 module socket if the
socket is not used.
2. Transport, storage
Please observe the notes on transport, storage and appropriate handling.
Observe the climatic conditions given in specifications.

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3. Installation
The module must be installed according to the regulation and instructions
given in this users manual.
Ensure proper handling and avoid mechanical stress.
Do not bend any components and do not change any insulation distances.
Do not touch any electronic components and contacts.
Instruments may contain electrostatically sensitive components, which can
easily be damaged by inappropriate handling.
Do not damage or destroy any electrical components since this might
endanger your health!
4. Electrical connection
Before switching the instrument on, one must check the correctness
of connection to the network.
In case of the protection terminal connection with a separate lead one must
remember to connect it before the connection of the instrument to the mains.
When working on live instruments, the applicable national regulations for the
prevention of accidents must be observed.
The electrical installation must be carried out according to the appropriate
regulations (cable cross-sections, fuses, PE connection). Additional
information can be obtained from the users guide.
The documentation contains information about installation in compliance with
EMC (shielding, grounding, filters and cables). These notes must be observed
for all CE-marked products.
The manufacturer of the measuring system or installed devices is responsible
for the compliance with the required limit values demanded by the EMC
legislation.
5. Operation
Measuring systems including SM3 modules, must be equipped with protection
devices according to the corresponding standard and regulations for preven-
tion of accidents.
After the instrument has been disconnected from the supply voltage, live
components and power connections must not be touched immediately
because capacitors can be charged.
The housing must be closed during operation.
6. Maintenance and servicing
Please observe the manufacturers documentation.
Read all product-specific safety and application notes in this users manual.

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Before taking the instrument housing out, one must turn the supply off.
The removal of the instrument housing during the guarantee
contract period may cause its cancellation.
Fig. 2. Overall and mounting dimensions
4. INSTALLATION
4.1. Module fixing
The module is designed to be fixed on a 35 mm rail (EN 60715). The module
housing is made of a self-extinguishing plastic.
Housing overall dimensions: 22.5 x 120 x 100 mm. One should connect external
wires with a cross-section of 2.5 mm2(from supply side) and of 1.5 mm2(from
input signal side).

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Fig.3
Electrical connections
of the SM3 logic input
module
There are three diodes on the frontal plate:
green - when lighting, signals the supply on,
green (RxD) - signals the data reception
by the module,
yellow (TxD) - signals the data transmission
by the module.
1 GND line of logic inputs
2 IN1 line - logic input No 1
3 5 V d.c. line
4 IN2 line - logic input No 2
5 GND line of the RS-485 interface
6, 7 Lines supplying the module
8 A line of the RS-485 interface with
optoisolation
9 B line of the RS-485 interface with
optoisolation
Description of SM3 module lead-outs Table 1
Terminal description
Terminal
nr
An exemplary way of logic input connections is
presented below
Fig.4 Connection of logic inputs
4.2. Terminal description
One must connect the supply and external signals in accordance with fig. 3, 4 and
5. Particulars lead-outs are described in the table 1.
NOTE: One must pay a particular attention on the correct connection of
external signals (see table 1).

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Fig. 5. Connection way of RS-485 and RS-232 interfaces

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NOTE:
Taking into consideration electromagnetic interference, one must use shielded
wires to connect logic input signals and RS-485 interface signals. The shield
must be connected to the protective terminal in a single point. The supply
must be connected by a two-wire cable with a suitable wire diameter, ensuring
its protection by an installation cut-out.
5. SERVICE
After connecting external signals and switching the supply, the SM3 module is ready
to work. The lighted green diode signals the module operation. The green diode
(RxD) signals the module polling, however the yellow diode (TxD), the module
answer. Diodes should cyclically light during the data transmission, both through
the RS-232 and RS-485 interface. The signal + (terminal 3) is the 5 V output with
the admissible 50 mA load. One can use it for supply external circuits.
All module parameters can be programmed by means of RS-232 or RS-485. The
RS-232 port has constant transmission parameters in compliance with technical
data, what enables the connection with the module, even when programmed
parameters of the RS-485 digital output are unknown (address, mode, rate).
The RS-485 standard allows the direct connection to 32 devices on a single serial
link of 1200 m long. To connect a higher number of devices it is necessary to use
additional intermediary-separating devices (e.g. PD51 converter/repeater). The
manner to connect the interface is given in the module users manual (fig. 5). To
obtain a correct transmission it is necessary to connect lines A and B in parallel with
their equivalents in other devices. The connection should be made by a shielded
wire. The shield must be connected to the protective terminal in a single point. The
GND line serves to the additional protection of the interface line at long connections.
One must connect it to the protective terminal (that is not necessary for the correct
interface operation).
To obtain the connection with the PC computer through the RS-485 port, an
RS-232/RS-485 interface converter is indispensable (e.g. a PD51 converter) or an
RS-485 card. The marking of transmission lines for the card in the PC computer
depends on the card producer. To realise the connection through the RS-232 port,
the cable added to the module is sufficient. The manner of both port connection
(RS-232 and RS-485) is presented on the Fig.5.
The module can be connected to the Master device only through one interface
port. In case f the simultaneous connection of both ports, the module will correctly
operate with the RS-232 port.