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Idiomas disponibles
LM-4A-2IO-M
LM4A-2IO-M SIGNAL CENTRALIZER
LM4A-2IO-M is an industrial signal centraliser with four
analogue inputs, two voltage-free digital inputs and two
digital relay outputs.
This document is the use and operation manual of the LM4A-2IO-M
device. You can download the manual from CIRCUTOR's web site in
case it is misplaced:
www.circutor.com
You must disconnect the unit from the power supply
before performing any maintenance operations,
connection modifications, repairs, etc. If you suspect an
operational fault in the unit or in its protection system, remove the unit
from service. The design of the unit makes it easy to replace in the
event of a fault.
1.-
DESCRIPTION
The LM4A-2IO-M unit is a process signal concentrator that
uses RS-485 communication and allows for remote signal
display.
Likewise, the LM4A-2IO-M unit has 4 analogue inputs that
operate in the 0 to 20 mA range. The unit handles
standard proportional industrial measurement signals and
operates in linear form throughout the input range.
The LM4A-2IO-M unit also has 2 voltage-free digital
inputs; they can be configured to detect logical input state
(open or closed) or associated to 2 internal memory
registers to count the impulses. In the impulse counting
mode, each input can record a maximum of 4,294,967,295
impulses. When the memory record reaches the maximum,
the meter resets to zero with the next impulse, starting the
counting process again.
The minimum duration of the impulse or change of state
must be 50 ms and the minimum period of time between
two subsequent impulses on the same input must be 50
ms. This represents a maximum sampling frequency of 10
Hz.
The LM4A-2IO-M unit has 2 digital relay outputs; these
outputs are governed by the RS-485 bus master, which
can activate or deactivate them with Modbus commands
when requested by the application. The unit has a write
function that can perform activation or deactivation
operations on any output or generate impulses. The
duration of the output impulse is variable and it can be
programmed with Modbus instructions.
2.- COMMUNICATION
The unit has an RS-485 communications port to read and
write the device's parameters. To do so, the unit uses the
Modbus/RTU communications protocol.
2.1.- Default configuration.
The unit comes with peripheral number 97 by default (61 in
hexadecimal). When placed on the bus with other
equipment, LM4A-2IO-M responds to this Modbus address.
The address modification command can be used to assign
any other address (a maximum of FF in hexadecimal,
equivalent to peripheral 255).
In case the slave number is not known, the default address
can be retrieved (97 in decimal or 61 in hexadecimal):
-
Disconnect the unit's auxiliary power supply
-
Permanently activate the button located on the
unit's front panel
-
Power the unit while the button is activated and the
unit will automatically retrieve the default peripheral
number (97 in decimal or 61 in hexadecimal).
2.2.- Modbus memory map.
MODBUS
Digital and Analogue Inputs Value / State Reading
0000h
Meter Value 1
0001h
61 04 0000 0002
0002h
Meter Value 2
61 04 0002 0002
0003h
Analogue input 1
0500h
61 04 0500 0001
Analogue input 2
0501h
61 04 0501 0001
Analogue input 3
0502h
61 04 0502 0001
Analogue input 4
0503h
61 04 0503 0001
Digital Input State
Activated = Closed (1)
2000h
Deactivated = Open (0)
61 04 2000 0001
MODBUS
Digital Output Control Writing (Relay)
Digital output Control (R)
Activated = Closed (1)
1000h
Deactivated = Open (0)
61 10 1000 0001 02 0003
MODBUS
Impulse Digital Output Control Writing (Relay)
Output Impulses (R)
Activated = Closed (1)
1500h
Deactivated = Open (0)
61 10 1500 0001 02 0003
MODBUS
Impulse Duration Configuration Write
Impulse duration
2500h
61 10 2500 0001 02 01 01
Low Byte - Relay 1 / High Byte - Relay 2 / Other values can be
established (ms)
The maximum duration of the impulse cannot exceed 5100 ms
MODBUS
Peripheral Configuration / Speed Writing
Peripheral number
3000h
61 10 3000 0001 02 0001
Transmission speed
3001h
61 10 3001 0001 020001
MODBUS
Version and Serial Number Reading
3500h
Device Version
3501h
61 04 3500 0003
3502h
3503h
Serial number
3504h
61 04 3503 0002
All examples shown above on the Modbus/RTU memory map are
provided for information purposes only. The parameterisation
values and peripheral number will vary, depending on the
installation requirements and the prior configuration of the
device. Two CRC bytes (checksum) must be added at the end of
each Modbus/RTU frame.
2.2.1.- Modbus functions
MODBUS (Hex)
Description
04
Input records reading
10
Writing of several records
3.- TECHNICAL SPECIFICATIONS
Power circuit
- Single-phase:
85...265 Vac / 120...374 Vdc
- Frequency:
47...63 Hz
- Maximum consumption:
3.5 VA
- Working temperature:
-10...60 ºC
- Humidity without
condensation:
5...95 %
Construction features
- Enclosure material:
UL94 – V0 Self-extinguishing Plastic
- Protection degree:
IP20
- Dimensions:
93 x 71 x 58 mm
- Weight:
180 g
- Maximum operating height:
2000 m
Serial Interface
- Type:
Three-wire RS-485 (A / B / GND)
- Transmission speed:
9,600 bps / 19,200 bps configurable
- Data bits:
8
- Parity:
No parity
- Stop bit:
1
Digital Input Characteristics
- Type:
Voltage-free opto-insulated (dry
- Maximum activation current:
contact)
50 mA
Analogue Input Characteristics
- Type:
Analogue current (passive)
- Input range:
0...20 mA
- Resolution in points:
1.024 points
- Input impedance:
100 Ω
- Transducer resolution:
10 bits
Meter Input 1 (Hex)
0000 0000...FFFF FFFF
Digital Output Characteristics
Meter Input 2 (Hex)
- Type:
0000 0000...FFFF FFFF
- Max. operating power:
Analogue input Value 1
- Max. operating voltage:
0000...03FF (Hex)
- Max. switching current:
Analogue input Value 2
- Electrical life (250 Vac / 5A):
0000...03FF (Hex)
- Mechanical life
Analogue input Value 3
LED symbols
0000...03FF (Hex)
Analogue input Value 4
- Power:
0000...03FF (Hex)
0000
1 and 2
- Flashing RX:
- Flashing TX:
deactivated
0001
Input 1 activated
Safety
0002
Input 2 activated
0003
1 and 2 activated
Installation Category III / EN61010. Double-insulated electric
shock protection Category II. The equipment must be connected
0000
1 and 2
to a power circuit protected with type gl fuses, in compliance with
deactivated
IEC 269, or type M, with values from 0.5 to 1A. It must be fitted
0001 Output 1 activated
with a circuit breaker switch or an equivalent device, in order to
0002 Output 2 activated
be able to disconnect the equipment from the power supply grid.
0003
1 and 2 activated
The minimum diameter of the power supply cable shall be 1mm
If the unit is not operated according to the manufacturer's
0000
1 and 2
specifications, the equipment guaranteed degree of protection
deactivated
may be compromised.
0001
Output Impulse 1
Standards
0002
Output Impulse 2
0003
Output Impulse
IEC 60664, VDE 0110, UL 94, EN61010-1, EN55011, EN 61000-4-2,
1&2
EN 61000-4-3, 61000-4-11, EN 61000-6-4, EN 61000-6-2, EN
61000-6-1, EN 61000-6-3, EN 61000-4-5, CE
01
Duration 20 ms
FF
Duration 5100 ms
4.- CONNECTIONS
0001
Min. value (001)
00FF
Maximum (255)
0001
9600 bps
0002
19.200 bps
Format: "V1.10" values in
ASCII and the last byte is
always 0
907 XXX XXX
5.- TECHNICAL SERVICE
If you have any doubts about the operation of the unit or
suspect any malfunction, contact our service staff at
CIRCUTOR, S.A.U.
CIRCUTOR, S.A.U. - Technical Assistence
Vial Sant Jordi, s/n
08232 – Viladecavalls (Barcelona), SPAIN
Tel: (+34) 93 745 29 00
email:
sat@circutor.com
Relay
750 VA
250 Vac
With resistive load Ie: 5 Aac
3 x 10
operations
4
2 x 10
operations
7
Equipment with auxiliary power
supply
RS-485 Reception activity
RS-485 Emission activity
.
2
M98233001-20-22A
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