elco EMS24 Series User manual

EL.CO. S.R.L. – EMS24x-xxx - INSTRUCTIONS FOR USE - Ver.01 - 05/22 – PAGE 1
THREE-PHASE MOTOR
CONTROL RELAY
INSTRUCTIONS FOR USE
Ver. 01 (EN) – 05/22
EL.CO. S.r.l.
Via Lago di Molveno, 20
36015 SCHIO (VI) ITALY
TEL.: [phone]
FAX: [phone]
Website: http://www.elco-italy.com
INTRODUCTION
This manual contains the information required
for proper installation and the instructions for
use and maintenance of the product. It is
therefore recommended to read it carefully and
preserve it.
This publication is the exclusive property of
EL.CO. S.R.L. that places the absolute
prohibition of reproduction and disclosure, even partial, if not
expressly authorized.
EL.CO. S.R.L. reserves the right to make aesthetic and
functional changes at any time and without notice.
If a malfunction or failure of the device can create hazardous or
dangerous situations for people, animals or property, the
system must be equipped with additional security devices.
EL.CO. S.R.L. and its legal representatives do not assume any
responsibility for any damage to people, things or animals
deriving from tampering, improper use, incorrect use or
otherwise not complying with the device's features.
1
–
DIMENSIONS (mm)
1.1 - EMS24 SERIES MODULE FOR DIN RAIL ASSEMBLY
DE
w = 22.5 mm
h = 100 mm
d = 113.65 mm
2
-
DEVICE DESCRIPTION
2.1 - GENERAL DESCRIPTION
The EMS24 series consists of hybrid motor starters that replace the
classic reversing circuit and motor protection in a single device.
With the motor starters of EL.CO., you can switch the motor reliably
and safely. It can be used where there is a need to use three-phase
asynchronous motors. The range consists of 4 product versions:
- EMS24x: Motor starter with only the motor start function.
- EMS24x-R: Motor starter with the function of starting and
reversing the motor.
- EMS24x-RC: Motor starter with the function of starting,
reversing and control of load.
- EMS24x-RCS: Motor starter with the function of starting,
reversing, control of load and enable function.
Each version is available in both 3A and 9A versions.
(x = 3 or 9 depending on the choice of 3A or 9A)
For easy reading of the manual, we consider the product names
EMS24x, EMS24x-R, EMS24x-RC, EMS24x-RCS without
specifying the amperage as it is indifferent to reading the manual.
3
-
SMART
-
CONNECTION
3.1 – PROGRAMMING/MONITORING FUNCTION
The EMS24x-xxx series is a strong innovation over similar product.
The smart-connection function allows you to communicate with the
motor starters to monitor the status or to configure the device.
The communication phase is not mandatory for the use of the
device as it is possible to access all the features through the
physical part of the device.
EMS24 Series

EL.CO. S.R.L. – EMS24x-xxx - INSTRUCTIONS FOR USE - Ver.01 - 05/22 – PAGE 2
3.2 - COMMUNICATION VIA RS485 MODBUS
3.2.1 - DESCRIPTION
All devices are equipped with an RS485 serial communication
interface through the bus and the terminal (Paragraph 4.4).
To keep the line at rest, the use of a termination resistor of 120
Ohm is required. The device does not mount this resistor. The
termination of the RS485 line with the 120 Ohm resistor can be
done through the terminal given as an accessory (see
Paragraph 10.6).
The communication speeds implemented range from 1200 to 38400
baud rates and allow very satisfactory performances, while
remaining well below the limits set by the RS485 standard. This
allows the wiring of the line to be made using a medium quality
shielded twisted pair: it is sufficient that the total capacity of the line
does not exceed 200nF.
The poll rate during programming and use must not be
less than 50ms.
The maximum length of an RS485 transmission is 400
meters.
3.2.2 - DESCRIPTION OF THE COMMUNICATION PROTOCOL
The protocol is a subset of the widely used MODBUS RTU protocol.
This choice guarantees easy of connection to many PLCs and to all
commercial supervision programs.
The default MODBUS address is 100.
For those wishing to develop their own application software, all the
necessary tips and information are available.
The MODBUS RTU protocol functions implemented in the EMS24x-
xxx instruments are:
function 3 - reading of n words
function 6 - writing a word
These functions (Paragraph 7) allow the supervision program to
read and edit any data of the module.
Each message contains four fields:
•slave address: the values between 1 and 255 are valid;
address 0 (zero) is reserved by MODBUS RTU for
broadcasting messages, but it is not adopted in the
EMS24x-xxx series due to the implicit unreliability of this
type of communication;
•function code: it contains 3 or 6 depending on the
specified function;
•information field: it contains the addresses or the value of
the words, as required by the function used;
•control word: it contains a cyclic redundancy check (CRC)
calculated according to the rules envisaged for CRC16.
The characteristics of asynchronous communication are: 8 bits, no
parity, one stop bit.
3.2.3 - DATA EXCHANGE
The data exchanged consist of a 16-bit word. All readable and
writable data appear as 16-bit words allocated in the device's
memory.
The operating and configuration parameters of the device can be
read and written via serial communication.
The configurable parameters are found in Paragraph 6.
4
-
INSTALLATION AND USE WARNINGS
4.1 - PERMITTED USE
The device has been designed as a measurement and
adjustment device in compliance with the EN60947-4-2 standard for
operation at altitudes up to 2000 m. The use of the device in
applications not expressly provided for by the above-mentioned
standard must provide for all appropriate protection measures. The
device CANNOT be used in hazardous (inflammable or explosive)
environments without proper protection. It should be remembered
that the installer must ensure that the electromagnetic compatibility
rules are respected even after the device has been installed,
possibly using special filters. If a failure or malfunction of the device
can create hazardous or dangerous situations for persons, animals
or property, the system must be equipped with additional
electromechanical devices to ensure safety.
4.2 - MECHANICAL ASSEMBLY
All models of the EMS24x-xxx series must be installed on a DIN rail.
Avoid placing the internal part of the device in places subject to high
humidity or dirt that may cause condensation or the introduction of
conductive parts or substances into the device. Ensure that the
device has adequate ventilation and avoid installation in containers
where devices that can lead the device to operate outside the
declared temperature limits are located. Install the device as far as
possible from sources that may generate electromagnetic
disturbances such as motors, contactors, relays, solenoid valves
etc.
Keep in mind that, once the motor starter has been installed on the
DIN bar, its only accessible part will be the front panel.
An installation that does not comply with the provisions set out in
this paragraph could compromise the declared protection levels.
4.3 - WIRING DIAGRAM
4.3.1 – EMS24x
GND-+24Vdc power
supply
ON
start motor
L1 L2 L3
load supply
T1 T2 T3
load

EL.CO. S.R.L. – EMS24x-xxx - INSTRUCTIONS FOR USE - Ver.01 - 05/22 – PAGE 3
4.3.2 – EMS24x-R
GND-+24Vdc power
supply
RIGHT
start motor on the
right
LEFT
start motor on the left
L1 L2 L3
load supply
T1 T2 T3
load
4.3.3 – EMS24x-RC
GND-+24Vdc power
supply
RIGHT
start motor on the
right
LEFT
start motor on the left
MAN
Manual reset
RESET
Reset command
AUTO
Automatic reset
L1 L2 L3
load supply
T1 T2 T3
load
NO NC COM
Alarm output relay
4.3.4 – EMS24x-RCS
ND-+24Vdc power
supply
RIGHT
start motor on the
right
LEFT
start motor on the left
MAN
Manual reset
RESET
Reset command
AUTO
Automatic reset
E
Enable
L1L2L3 load supply
T1 T2 T3
Load
NO NC COM
Alarm output relay
4.4 – CONNECTION FROM A DEVICE TO ANOTHER DEVICE
The devices of the EMS24x-xxx series can be connected to each
other through the bus connector (code: BC-5P) supplied as an
accessory.
For access to the Modbus line, there are special connection
terminals (TC-5PL, TC-5PR). One to get to the master and the other
to terminate the line with a special resistor.
The pinout from the bus connector is shown below.
A device battery must consist of a maximum of 16
devices.
4.5 - POWER SUPPLY TECHNIQUES
EMS24x-xxx devices have 2 possibilities of being programmed:
- Traditional technique
- Smart-Supply
4.5.1 - TRADITIONAL TECHNIQUE
The traditional technique involves the direct power supply of the
modules by connecting the 24VDC source to each of the terminals
4.5.2 - SMART-SUPPLY
The Smart-Supply system is based on the use of the bus connector.
Up to 16 modules, the power distribution via bus takes place by
powering a single module. In this way it is sufficient to power only 1
of the 16 modules to power them all.

EL.CO. S.R.L. – EMS24x-xxx - INSTRUCTIONS FOR USE - Ver.01 - 05/22 – PAGE 4
5
-
OPERATION
5.1 – DESCRIPTION
The motor starters have the function of switching and reversing the
motors in a reliable and safe way. The 4 models differ in having
more functions.
5.2 – EMS24x
This motor starter is the basic version of the series. It only has the
function of starting the motor.
The product is powered at 24 Vdc and has only an ON input to
enable the motor to run. The lower part of the device has 2
terminals relating to the input of the phases and the load.
+24Vdc: 24V DC voltage
GND: Common for voltage
ON: It enables 24Vdc to give the start command to the product
T3, T2, T1: Three-phase load
L3, L2, L1: Three-phase current
The LEDs arranged in front are:
Explanation: A = LED off, E = LED on with constant light
Status Description POW
ER
ON
OFF
Device off A A
ON
Device on E A
ON
Device on
and running
E E
5.3 – EMS24x-R
This motor starter has the start and reverse function.
The product is powered at 24 Vdc and has 2 inputs so you can
select whether you want to start the motor clockwise (Right) or
counterclockwise (Left). The lower part of the device has 2
terminals relating to the input of the phases and the load.
+24Vdc: 24V DC voltage
GND: Common for voltage
Right: It enables 24Vdc to give the right tip command
Left: It enables 24Vdc to give the left tip command
T3, T2, T1: Three-phase load
L3, L2, L1: Three-phase current
The LEDs arranged in front are:
Explanation: A = LED off, E = LED on with constant light
Status Description POW
ER
Right Left
OFF
Device off A A A
ON
Device on E A A
ON
Device switched on
and running
clockwise
E E A
ON
Device switched on
and running counter-
clockwise
E A E
The device cannot go left or right at the same time.
5.4 – EMS24x-RC
This motor starter has the function of starting, reversing and control
of load.
The product is powered at 24 Vdc and has 2 inputs so you can
select whether you want to start the motor clockwise (Right) or
counterclockwise (Left). It has a terminal for managing inputs
relating to manual and automatic reset and a terminal relating to the
alarm relay output through a clean contact.
This type of product has the possibility, through a trimmer, to set the
alarm threshold current percentage. To perform the current set, you
need to:
- Turn the trimmer to the desired position
- Press the button on the front for 3 seconds
- Wait for the blinking of the led
The lower part of the device has 2 terminals relating to the input of
the phases and the load.
+24Vdc: 24V DC voltage
GND: Common for voltage
Right: It enables 24Vdc to give the right tip command
Left: It enables 24Vdc to give the left tip command
Reset: Internal 24Vdc. To decide the type of reset, it is necessary
to make a bridge between Reset and Auto to have the automatic
reset. To carry out the manual reset, a bridge must be made
between Reset and Man enabled by an external device.
Connections for AUTO, MAN and RESET must have a
maximum length of 30m
There is a terminal for managing the error through a clean contact.
When faced with an error, the relay closes and then the contact
closes between NO and Com. Normally the closed contact is the
one between NC and Com.
NO: Normal open
NC: Normal close
Com: Common
T3, T2, T1: Three-phase load
L3, L2, L1: Three-phase current
The LEDs arranged in front are:
Explanation: A = LED off, E = LED on with constant light, B =
Symmetrical flashing
Status Description POW
ER
Err Right Left Reset
OFF
Device turned off A A A A -
ON
Device turned on E A A A -
ON
Device switched on
and
running
clockwise
E A E A -
ON
Device switched on
and running counter-
clockwise
E A A E -
ERR
Motor protection:
When the motor
-

EL.CO. S.R.L. – EMS24x-xxx - INSTRUCTIONS FOR USE - Ver.01 - 05/22 – PAGE 5
current is greater
than the rated
current. (Cooling time
20min)
Error during
clockwise running
E B E A -
Error during counter-
clockwise running
E B A E -
After 2 minutes
“Right” or “Left” fl
Error during
clockwise running
E B B A YES
Error during counter-
clockwise running
E B A B YES
ERR Symmetry:
Two
phases differ by more
than 33%
E B A A YES
ERR No load:
The product
does not detect the
load
Error during
clockwise running
B B E A -
Error during counter-
clockwise running
B B A E -
Error without any
input
B B A A -
After 2 minutes, the
device can be reset
Error during
clockwise running
B B B A YES
Error during counter-
clockwise running
B B A B YES
Error without any
input
B B A A YES
When the product goes into error, after a certain time, the product
can be resettable.
In the event of a "Motor protection" and "No Load" error, after 2
minutes if:
- We have connected on AUTO, the product resets itself
automatically
- Otherwise, we must connect between Reset and Man as
described above and give a signal on MAN or press the
button on the front of the product for 1 second.
5.4 – EMS24x-RCS
This motor starter has the function of starting, reversing, control and
enable of load.
The product is powered at 24 Vdc and has 2 inputs so you can
select whether you want to start the motor clockwise (Right) or
counterclockwise (Left). It has a terminal for managing inputs
relating to manual/automatic reset, enable and a terminal relating to
the relay output through a clean contact.
This type of product has the possibility, through a trimmer, to set the
current percentage of the full scale. In this way, you can vary the
maximum threshold current. To perform the current set, you need
to:
- Turn the trimmer to the desired position
- Press the button on the front for 3 seconds
- Wait for the blinking of the led
In the event of an error, the device communicates the problem
through an output with a clean contact. (Described below)
The lower part of the device has 2 terminals relating to the input of
the phases and the load.
Unlike the EMS24x-RC model, this model has an additional input
called E, which indicates Enable.
This device works only with the Enable signal enabled, i.e., by
inserting a 0V signal directly on the terminal. This terminal is used
to connect safety devices and is used to block the motor in an
emergency.
Without the E (Enable) signal inserted, the product does
not work.
This device is not a safety device, but it can be locked
with a safety device
+24Vdc: 24V DC voltage
GND: Common for voltage
Right: It enables 24Vdc to give the right tip command
Left: It enables 24Vdc to give the tip command to the left
Reset: Internal 24Vdc. To decide the type of reset, it is necessary
to make a bridge between Reset and Auto to have the automatic
reset. To carry out the manual reset, a bridge must be made
between Reset and Man enabled by an external device.
Connections for AUTO, MAN and RESET must have a
maximum length of 30m
There is a terminal for managing the output through a clean contact.
When faced with an error, the relay closes and then the contact
closes between NO and Com. Normally the closed contact is the
one between NC and Com.
NO: Normal open
NC: Normal close
Com: Common
T3, T2, T1: Three-phase load
L3, L2, L1: Three-phase current
The LEDs arranged in front are:
Explanation: A = LED off, E = LED on with constant light, B =
Symmetrical flashing
Status Description POW
ER
Err Right Left Reset
OFF
Device off A A A A -
ON
Device on E A A A -
ON
Device switched on
and running
clockwise
E A E A -
ON
Device switched on
and running counter-
E A A E -

EL.CO. S.R.L. – EMS24x-xxx - INSTRUCTIONS FOR USE - Ver.01 - 05/22 – PAGE 6
clockwise
ERR Motor protection
:
When the
motor
current is greater
than the rated
current. (Cooling time
20min)
-
Error during
clockwise running
E B E A -
Error during counter-
clockwise running
E B A E -
After 2 minutes
“Right” or “Left” fl
Error during
clockwise running
E B B A YES
Error during counter-
clockwise running
E B A B YES
ERR Symmetry:
Two
phases differ by more
than 33%
E B A A YES
ERR No load:
The product
does not detect the
load
Error during
clockwise running
B B E A -
Error during counter-
clockwise running
B B A E -
Error without any
input
B B A A -
After 2 minutes the
device can be reset
Error during
clockwise running
B B B A YES
Error when running
counterclockwise
B B A B YES
Error without any
input
B B A A YES
When the product goes into error, after a certain time, the product
can be resettable.
In the event of a "Motor protection" and "No Load" error, after 2
minutes if:
- We have connected on AUTO, the product resets itself
automatically
- Otherwise, we must connect between Reset and Man as
described above and give a signal on MAN or press the
button on the front of the product for 1 second.
6
-
PROGRAMMABLE PARAMETERS TABLE
Below are all the parameters that the device can be equipped with.
The hex address is used exclusively for the series. The
address in decimal value is also available for better reading.
RO: It indicates "Read Only"
RW: It indicates "Writing and Reading"
WO: It indicates "Write Only"
Description Range Def. Hex-dec
address
CP1
(RO)
1st field of
the product
code
'C' (in ascii) C 0x01-1
CP2
(RO)
2nd field of
the product
code
‘M’ (in ascii) M 0x02-2
CP3
(RO)
3rd field of
the product
code
‘T’ (in ascii) T 0x03-3
CP4
(RO)
4th field of
the product
code
‘-’ (in ascii) - 0x04-4
CP5
(RO)
5t
h field of
the pr
oduct
code
‘A’ (in ascii): EMS24x
series
‘B’ (in ascii):
EMS24x-R series
‘C’ (in ascii):
EMS24x-RC series
‘D’ (in ascii):
EMS24x-RCS series
0x05-5
Max.
current
(RO)
Maximum
current
3 or 9 A 0x0F-15
Status
(RW)
Device
status (R)
‘AS’: Product on and
stopped
‘AR’: Product on and
running to the right
‘AL’: Product on and
running to the left
‘EO’: Overcurrent
error
‘ED’: Phase
asymmetry error
‘EL’: Load missing
error
The error return is 2
bytes in
hexadecimal. The
letters correspond to
the correspondence
in the ascii table
- 0x64-100
Reset
default (W)
9999
Current
Perc.
(RW)
(Only for
EMS24x-
RC and
EMS24x-
RCS
models)
Percentage of current
The percentage of
current indicates how
much to set the load
control threshold.
0 - 100 100 0x21-33
Address
Modbus address 1 - 255 100 0x09-9

EL.CO. S.R.L. – EMS24x-xxx - INSTRUCTIONS FOR USE - Ver.01 - 05/22 – PAGE 7
Modbus
speed
Modbus speed 1200
2400
9600
19200
38400
9600
0x0A-10
7
-
FUNCTIONS OF THE RS485 TRANSMISSION PROTOCOL
7.1 - FUNCTION 3 - READING N WORDS
The number of words to read must be less than or equal to twenty-
eight.
The request has the following structure:
Numbe
r of the
slave
Functi
on
numb
er
Address of the
first word
MSB LSB
Number of
words
MSB LSB
CRC
LSB MSB
byte 0 byte1=
0x03
byte 2 byte 3 byte 4 byte 5 byte 6 byte 7
The response has the following structure:
Numbe
r
of the
slave
Functi
on
numb
er
NB
Numbe
r of
bytes
read
Value of the
first word
MSB LSB
Subse
quent
words
CRC
LSB MSB
byte 0
byte1=
0x03
byte 2 byte 3 byte 4 byte 5 byte
NB+2
byte
NB+3
7.2 - FUNCTION 6 - WRITING A WORD
The request has the following structure:
Numbe
r of the
slave
Functio
n
number
Address of the
first word
MSB LSB
Value to write
MSB LSB
CRC
LSB MSB
byte 0 byte1=
0x06
byte 2 byte 3 byte 4 byte 5 byte 6 byte 7
The normal response is purely an echo of the request message:
Number
of the
slave
Functio
n
number
Address of the
first word
MSB LSB
Value to write
MSB L
SB
CRC
MSB LSB
byte 0 byte1=
0x06
byte 2 byte 3 byte 4 byte 5 byte 6 byte 7
7.5 – CYCLIC REDUNDANCY CHECK (CRC)
The CRC is a check word that allows you to verify the integrity of a
message.
Each message, sent or received, contains the CRC word in the last
two characters.
After receiving a request, the controller checks the validity of the
message received, thus comparing the CRC contained in the
message with the one calculated during reception.
During transmission, the controller calculates the CRC and places
the two characters at the end of the message.
The calculation of the CRC is performed on each character of the
message excluding the last two.
Since the EMS24x-xxx devices are compatible with the MODBUS
RTU (JBUS) protocol, they use the same algorithm for the
calculation of the CRC.
altri
caratteri
CRC = FFFF hex
CRC exor charCRC=
n=0
shift a destra del
CRC nel carry
carry = 1
CRC= CRC exor POLY
n = n+1
Y
Y
Y
Il CRC contiene il valore calcolato
prendi il prossimo
char
n < 8
The polynomial adopted by MODBUS RTU (JBUS) is 1010 0000
0000 0001.
Note: the first character of the CRC transmitted is the less
significant of the two calculated.
9
-
TECH
N
ICAL DATA
9.1 - ELECTRICAL CHARACTERISTICS
Power supply: 24VDC+-10%,
Maximum absorption: 60mA
Input/s: 1 to 2 run inputs (depending on the model) at 24VDC, 0 or 3
reset inputs (depending on the model)
Outputs: three-phase 500VAC 3A or 9A (depending on the model)
Isolation: 1.5 KV
9.2 - MECHANICAL CHARACTERISTICS
Container: Self-extinguishing plastic UL 94 V0
Dimensions: 22.5 x 100 x 113.65 mm
Weight: 200g
Installation: Omega DIN rail
Connections: screw terminals and extractable bus on din bar
Front protection degree: IP 20
Pollution degree: 2
Use environment: indoor.
Working ambient temperature: -25 ... 70°C
Working ambient humidity: 30 ... 95 RH% with no condensation
Temperature for the transportation and storage -40 ... 80°C

EL.CO. S.R.L. – EMS24x-xxx - INSTRUCTIONS FOR USE - Ver.01 - 05/22 – PAGE 8
9.3 - DEVICE CODING
EMS24x
EMS24x-R
EMS24x-RC
EMS24x-RCS
x: AMPERAGE:
3 = 3 Ampere
9 = 9 Ampere
9.4 - ACCESSORIES (Not supplied)
BC-5P = bus connector for bar connection
TC-5PR = connector for female RS485 line termination resistor
TC-5PL = connector for male RS485 line termination resistor
The TC-5PR and TC-5PL terminals are used to finish or extend the
product's RS485 line.
11
-
PROBLEMS, MAINTENANCE AND WARRANTY
11.1 - CLEANING
It is recommended to clean the device only with a slightly soaked
cloth of water or non-abrasive detergent and not containing
solvents.
11.2 - WARRANTY AND REPAIR
The device is guaranteed by manufacture defects or defects in
material found within 12 months from the date of delivery.
Warranty is limited to repair or replacement of the product.
Possible opening of the container, tampering with the device, or
improper use and installation of the product will automatically result
in the warranty being decayed.
In the event of a defective product during the warranty period or
outside the warranty period, contact the EL.CO. Sales Dept. to
obtain authorization for shipment.
The defective product, therefore, accompanied by the indications of
the defect found, must be sent to the EL.CO. unless otherwise
agreed.