ESA DC User manual

SEQUENCER FOR DEDUSTING PLANTS
DOCUMENTATION INDEX
1.1 Description
2.1 Standard features (List)
2.2 Standard features (Details)
2.3 Option on request
3.1 Installation rules and security
4.1 Technical features
5.1 Enter data in set mode
6.1 Display indications in operation
7.1 Display indications with alarm
8.1 Information and guide on the display
9.1 Wiring Diagram
10.1 Electronic board size and voltage settings
11.1 Enclosure dimensions
12.1 Problems solutions
13.1 Warranty
14.1 Certificates
1.1 DESCRIPTION
Sequencer for dedusting plant cleaning cycle control with digital dP control by internal transducer.
2.1 STANDARD FEATURES
A1a Minimum and maximum dP alarms on same relay (K2)
A2a Relay Voltage ON (K1)
AL1 Alarm relay contacts open
B10 Manual activation of every single output from keyboard
B1b Select Number of outputs
B2x Activation time from 0.05 to 5.00 sec.
B3c Interval time between ev. during post-cleaning
B3x Interval time from 1 to 999 sec.
B8b Short-circuit protection of every single output
C1 Digital differential pressure control (STOP at cycle end)
C13_10 dP full range 10.00 kPa = 100.0 mbar = 1012 mmH2O.
C4 Cleaning cycle
C4a Automatic operation mode
C4b Manual operation mode
C7c1 Minimum dP alarm. Contact open with alarm. Automatic reset.
C7d1 Maximum dP alarm. Contact open with alarm. Automatic reset.
C8 dP zero readout regulation
D14a Operation hours-counter
D1b1 Additional post-cleaning cycles from dP readout. Activation at STOP.
D5a Consent from external compressed air pressure switch
D6a ON/OFF cleaning cycle from external contact
G1 Maximum load power 25W per output
HVB Input and output voltage selection
SL Multi language display
Code: DC
Voltage IN / OUT: 115 VAC - 230 VAC (24 VAC - 24 VDC On Request)
Max Nr. Output: 32
GENERIC DOCUMENTATION. THE SPECIFIC DOCUMENTATION IS ATTACHED TO THE SEQUENCER

2.2 STANDARD FEATURES
The presence of options on request could nullify or modify the operating of standard features.
Code Description
A1a Minimum and maximum dP alarms on same relay (K2)
Minimum and maximum dP alarms act on the same relay. The display will specify the type of alarm.
A2a Relay Voltage ON (K1)
If the device is supplied, relay K1 is activated and the terminal board contact is closed. In case of power failure, this
contact is open.
AL1 Alarm relay contacts open
The relay contacts signaling the presence of alarm are open if there is no supply or in presence of alarm condition. With
power supply on and in the absence of an alarm, the contact is closed.
Relay contacts: 42 VAC - 5 A Max / 42VDC - 3A Max
B10 Manual activation of every single output from keyboard
By keyboard, it is possible to activate manually and individually every single output for an operation test.
Press key A to select the desired output to be activated. Press key C to activate the output.
The output is holded active for all the time that key C is pressed. It allows to measure the output voltage by using a
tester.
In case of anomalous operating, do this test with electrovalves disconnected.
B1b Select Number of outputs
The selection of the number of outputs to be control led is connected by keyboard in SET MODE. If you set 0 or AUTO
in this function the sequencer will automatically select the connected loads by skipping the non connected ones.
Minimum load 5W ÷ 12 W depending on the output voltage. If the load is below of the minimum, the autoselection does
not work correctly, set the number of outputs in set up.
B2x Activation time from 0.05 to 5.00 sec.
B3c Interval time between ev. during post-cleaning
Interval time between two activations settable by keyboard when post-cleaning cycles are active and during the forced
cycles of option C2x if available.
The selection range is the same as the inteval time in standard operation mode (B3x).
B3x Interval time from 1 to 999 sec.
If the pulse time is lower than 1 sec. it is possible to set any interval time value in the range indicated.
If the activation time is higher than 1 sec. the minimum settable interval time is:
Minumum interval time = 5 times pulse time (B2x)
B8b Short-circuit protection of every single output
In case of short-circuit, the corresponding output is automatically skipped. Relay K2 will signal the alarm condition and
display will show the alarm situation code E1 (See the alarm description).
Press key E to reset the alarm.
C1 Digital differential pressure control (STOP at cycle end)
In automatic running mode (C4a), the cleaning cycle is activated and deactivated according to the dP readout.
C1a Set the cleaning STOP threshold: if dP is below this threshold, the cleaning cycle stops and the display shows
'CYCLE STOP FOR LOW dP' or the letter 'P' according to the model. The cleaning cycle stops at the end of the cycle.
C1b Set the cleaning START threshold: if dP is above this threshold, the cleaning cycle is activated.
C13_10 dP full range 10.00 kPa = 100.0 mbar = 1012 mmH2O.
Maximum differential pressure value measurable by the device 10.00 kPa = 100.0 mbar = 1012 mmH2O.
With dP reading over 10 kPa the display shows 'E' instead of the numeric value of dP.
C4 Cleaning cycle
If all the requirements for the start-up of the cleaning cycle are fulfilled when supply is powered on (e.g. fan on, external
consents C6 or D5, dP readout above the start threshold), the sequencer will automatically activate the EV outputs
sequencially according to the times set by keyboard.
C4a Automatic operation mode
By keyboard in Setup it is possible to select the operation mode. In automatic mode, the controls of the fan, the dP, C6
and D5 are active and the activation of the cleaning cycle will depend on such functions.
C4b Manual operation mode
By keyboard in Setup it is possible to select the operation mode. In manual mode, the control of the fan, the dP, C6 and
D5 are not active.

2.2 STANDARD FEATURES
Code Description
C7c1 Minimum dP alarm. Contact open with alarm. Automatic reset.
If the dP readout is below the threshold in Set up, the minimum dP alarm is activated. The display shows the alarm
condition code E8 (see the alarm description) or the dP readout and letter L alternatively, according to the model.
The corresponding alarm relay will signal its condition. The alarm is automatically reset when the dP readout is above
the threshold again.
If set to 'OFF' or 'E' (according to the model), the function is excluded.
NOTE: the minimum dP alarm is delayed by 60 seconds by default after the activation of the first cleaning cycle.
C7d1 Maximum dP alarm. Contact open with alarm. Automatic reset.
If the dP readout is above the threshold in Set up, the maximum dP alarm is activated. The display shows the alarm
condition code E7 (see the alarm description) or the dP readout and letter H alternatively, according to the model.
The corresponding alarm relay will signal its condition. The alarm is automatically reset when the dP readout is below
the alarm threshold again.
The activation of this alarm is delayed by 20 seconds by default.
C8 dP zero readout regulation
In this set up code it is possible to adjust the zero reading of differential pressure. In this function the display shows the
dP reading and, with plant stops or air pipes not connected if the dP reading is not 0.00 kPa it is possible to adjust it by
key A and C.
D14a Operation hours-counter
In Setup it is possible to visualize an hours counter. This counter is active when the cleaning cycle in On. In case of fan
stop, consent D6 not present or with the device in Setup the counter stops.
D1b1 Additional post-cleaning cycles from dP readout. Activation at STOP.
In automatic operation mode, you can add a pre-set number of cleaning cycles after the fan stop. Their number can be
set from 0 to 99 by keyboard. The sequencer will automatically recognise the fan state by comparing the dP readout
with the threshold in set code 11: dP > set 11 = fan on, dP < set 11 = fan off.
Post-cleaning cycles are activated even if dP = 0.
When the fan is off or dP < set 11, the display shows 'FAN STOP'.
The display shows 'POST-CLEANING ACT' during additional cycles and if there is no alarm.
Post-cleaning cycles are activated only if the dP readout should reach the threshold value of cycle STOP in normal
operation mode.
D5a Consent from external compressed air pressure switch
If the operation mode is automatic and contact D5a is open, the cleaning cycle stops, relay K2 indicates the alarm
situation. Close D5a to restart the washing cycle from the point where it had stopped. If contact D5a is open, the display
shows alarm code E6.
NOTE: Link D5a clamps if it is not used with inputs from external contact active (See Setup 5.1).
D6a ON/OFF cleaning cycle from external contact
If contact D6a is open, the cleaning cycle is not enabled and the display shows 'START CONTACT D6a OPEN'.
Close D6a to start cleaning cycle from the first electrovalve.
NOTE D6a: Jump D6a if it is not used with inputs from external contact active (See Setup 5.1).
G1 Maximum load power 25W per output
HVB Input and output voltage selection
Use the jumpers on the board to select the supply voltage and the output voltage for the electrovalves. (See the drawing
of the printed circuit layout).
JP1: Select the supply voltage between 115VAC and 230VAC.
JP2: Select the output voltage between 24, 115, 230 V (Only when the power supply is 115VAC or 230VAC).
JP3: Select the output voltage between AC and DC only when JP2 is set to 24V.
ATTENTION: set the same output voltage you have selected by means of the jumpers to adjust the trip threshold of the
short-circuit. Otherwise, the sequencer might malfunction or be damaged.
SL Multi language display
In Set up it is possible to select the language of all the descriptions showed by the display:
Italian, English, French, German, Spanish.

2.3 OPTION ON REQUEST
The presence of options on request could nullify or modify the operating of standard features.
Code Description
D11 Emission control by TRIBO-CHECK probe. Alarms on relay K2.
By connecting the Tribo-Check probe to the device it is possible to keep under control the dust emission in the duct.
The TC probe management contain some function and possible alarm situations that allow to find if there is a broken
bag or a continuos emission over a set threshold.
If there is an alarm situation the relay K2 indicate it and on the display it is possible to check the kind of alarm. For
further information read the manual of the device

2.3 OPTION ON REQUEST
The presence of options on request could nullify or modify the operating of standard features.
Code Description
D21 Sensitivity for broken bag check
If a bag is broken, whenever you activate the solenoid valve corresponding to this bag, this will produce a dust puff. The
equipment can find out this failure and signal the row of bags where there is the breakage.
The activation of the alarm is related to the sensitivity threshold set up in Setup with a scale from 0 to 9 (9 = maximum
sensitivity). The sensitivity means how much the output signal from TC probe have to increase, to be considered as
caused by broken bag. (Ex.: by setting the sensitivity = 5, it is necessary an increment of minimum 6 mA of the output
signal from TC probe to be considered as broken bag).
The display will show the range of variation of the TC probe output signal to trigger this alarm.
If the activation of the same solenoid valve should give origin to peaks of emission above the threshold set up in Setup
for 3 consecutive cycles, this will trigger the E3 alarm for broken bag (see alarm description) and the solenoid valve that
has caused the emission will be excluded from the cleaning cycle.
One single solenoid valve at a time can be excluded from the cleaning cycle.
In the example shown by the graph, the sensitivity is set to 5 and activation of the electrovalves 3 for 3 consecutive
cycles create an emission peak that cause an increment the output signal from TC probe of more than 6 mA compared
to the value measured before the pulse. This situation will cause tha activation of the borken bag alarm.
Note 1. The BB sensitivity of the alarm threshold for broken bag will automatically adjust to any increase in the average
value of the signal from the TC probe. This control will enable the operator to discriminate the probe signal by identifying
the peaks for broken bag only.
Note 2. The alarm for broken bag is related to the interval time between a pulse and the following one. The interval time
shall be longer than the time that the dust caused reach the probe.
Only in this condition the device is able to find the row where the broken bag is.

2.3 OPTION ON REQUEST
The presence of options on request could nullify or modify the operating of standard features.
Code Description
D12c High emission alarm.
If the readout of the TC signal is above the value in set up code D12 the high emission alarm will be activated. The
display will show the alarm condition code E4 (see alarm description) and the relay will signal the alarm condition.
Press key E to reset the alarm.
In set up you can set up a delay for the activation of the high emission alarm.
The same relay is also used to signal the alarm code E5 (see alarm description) of the TC probe signal below 2 mA.
This alarm will automatically reset when the signal is above 2 mA once again.
D17 TC probe readout zero regulation (-9÷+9 points)
In set up function code 21 it is possible to adjust the zero reading of the signal from TC probe. In this function the
display shows the reading of the TC probe and, with plant stops and without dust in the duct, the reading must be 00
/3
D18 Emission readout setup in mg/m3
It is possible to adjust the readout of the TC probe in set up function 22 so that the display will show the exact value of
emissions expressed in mg/m3. The display will show the numeric value corresponding to a 20 mA signal from the TC
probe (20 default value).
For this regulation you shall enter a well-known dust quantity in the duct (e.g. 10 mg/m3) and check the readout of the
operating equipment on the display (e.g. 15).
Press key B and D in set up function 22 at the same time. The display will show 'L TC READOUT' and 001 mg/m3.
Press key A and C to set up the numeric value the equipment displayed during the test (15 in the example).
Press key B. The display will show 'A ACTUAL EMISSION' and 001 mg/m3.
Press key A and C to set up the numeric value corresponding to the dust quantity in the duct (10 in the example).
Press key E to go back to set up function 22. The display will automatically acquire the new numeric value
corresponding to a 20 mA signal from the TC probe (maximum value 250).
At the end of such operations, the numeric value that the equipment will display during the operation will correspond to
the readout of emissions expressed in mg/m3.
D19 Mean TC probe readout time
In Setup it is possible to set a mean time of the TC probe reading.
This function is used to cut sporadic emission peak and to have a stable reading on the display.
D20 TC probe signal readout in mA
In set up function 27 the reading of the signal from TC probe in mA is shown. The range of the signal is 4÷20 mA.

3.1 INSTALLATION RULES AND SECURITY
3.2 Protect the device against the direct exposure to the sun.
3.3 Avoid arranging the device in the proximity of or in direct contact with any source of heat and electromagnetic field. Connect
the device on supply lines different from those used for motor drives or other devices that may cause some noise on the
net.
Not security equipment.
3.4 Fix the device on the wall at minimum 60 cm from the floor.
3.5 The access to the device to adjust operating parameters have to be done by person with appropriate skills.
3.6 Before acting on the device for any operation, check for safe conditions. For electrical operations never forget to disconnect
the power supply, wait for 30 seconds for the internal capacitors discharge before opening. At the end of the operations
close the device to restore the protection degree before powering again.
3.7 In case of faulty that does not depend only the fuse, switch off immediately the supply voltage and contact the supplier.
3.8 One time in a month or more frequently if necessary verify if there is dust on the enclosure of the device and remove it if it is
present by using wet cloth.
3.9 For supply voltages, cabling and voltages applicable to the relay contacts, follow the current rules
3.10 For all input control signals to the Timer (D1a, D5, D6,...) use anti-flame wires with a minimum section of 0.5 mm².
3.11 For the electrical connection of the supply voltage and filter cleaning electrovalves use anti-flame wires with a minimum
section of 0.75 mm². For output relay contacts use anti-flame wires with a minimum section of 1.5 mm2.
3.12 The lack of application of existing rules and standards of installation and safety exonerate the manufacturer of
responsibility.
3.13 For the output signal 4÷20 mA related to dP use anti-flame shielded wire with minimum section of 0,5 mm². (Option on
request. Code: C11a)
3.14 Do not connect to earth the common of the electrovalves (see electrical wiring diagram).
3.15 For the electrical connections use antiflame shielded cable 3 x 0,75 mm². (Option on request. Code: D11/ D11a)
4.1 TECHNICAL FEATURES
Power requirement 10 VA (Stand-by) - 30 VA Max ev ON
Operating temperature - 10 °C ÷ + 50 °C
dP Control With internal trasducer
Pneumatic connection Rilsan 6 x 4
Dimensions / Protection degree 321x260x142 mm. / IP65
Terminals 2,5 mm² - 250 VAC / 12 A
Voltage applicable to the relay contacts 42 VAC - 5 A Max / 42VDC - 3A Max
A wrong supply voltage connection might cause irreparable damages to the device.
The fuse wire protect only from any short circuit and not necessarily from wrong supply voltage.
Device in class III.

5.1 ENTER DATA IN SET MODE
SETUP / DISPLAY DESCRIPTION Range Code Default
00 LANGUAGE SEL.
SL ENGLISH Display language selection SL
01 DIGITAL INPUTS
C0 DISABLE ENABLE / DISABLE inputs from external contacts C0
02 OPERATION
C4b MANUAL Operation Mode selection AUTOMATIC / MANUAL C4b
03 PULSE TIME
B2x 0.50 sec. Pulse time from 0.05 to 5.00 sec. 0.05÷5.00 B2x 0.50 sec.
04 INTERVAL TIME
B3x 005 sec. Interval time between ev. from 1 to 999 sec. 001÷999 B3x 5 sec.
05 POSTCL INT.
B3c 005 sec. Interval time between ev. during post-cleaning from 1 to 999 sec. 001÷999 B3c 5 sec.
06 POST CYCLES
D1x 002 cycles Number additional cycles after fan stop 00÷99 D1x 5
07 ELECTROVAL.N.
B1b 016 ev. Selection Number of electrovalves B1b
08 EV TEST
B10 001 OFF TEST Manual activation of every single ev. from keyboard B10
09 HOURS COUNTER
D14a 00000 Hours Operation hours-counter 0÷65535 D14a
10 ZERO dP ADJ.
C8 0.00 kPa dP zero readout regulation C8 0.00
11 FAN THRESHOLD
D1bx 0.10 kPa dP threshold for cycle activation after fan stop 0.01÷0.99 D1bx 0.10
12 MIN dP ALARM
C7c1 OFF Minimum dP alarm threshold 0.01÷9.99 C7c1 OFF
13 dP STOP CYCLE
C1a 1.00 kPa 1st dP threshold, STOP cleaning since dP low 0.01÷9.99 C1a 1.00
14 dP START CYCLE
C1d 2.00 kPa 2nd dP threshold, START cleaning since dP high 0.01÷9.99 C1b 2.00

5.1 ENTER DATA IN SET MODE
SETUP / DISPLAY DESCRIPTION Range Code Default
15 MAX dP ALARM
C7d1 3.00 kPa Maximum dP alarm threshold. 0.01÷9.99 C7d1 3.00
18 EV. VOLTAGE
HV Vout = 24 V Threshold adjustment for option B8x correct operating. See jumper JP2
position. HV

5.1 ENTER DATA IN SET MODE
SETUP / DISPLAY DESCRIPTION Range Code Default
20 TC CONTROL
D11 ON Inclusion / exclusion TC probe control D11
21 ZERO TC ADJ.
D17 00 mg/m3 TC reading zero adjustment. (TC reading on display) -9 ÷ +9 D17
22 TC ADJUST.
D18 20 mA = 100 TC reading adjustment to get value on display in mg/m3 D18
23 ALL. TC DELAY
D12a1 010 sec. Delay for the activation of the continuos emission alarm 1 ÷ 250 D12
25 TC ALARM THRES.
D12c 050 mg/m3 Continuous emission alarm threshold 1 ÷ 99 D12b1
24 SENSITIVITY
D21 5 = 06 mA Sensitivity for broken bag check 0 ÷ 9 D21
26 TC MEAN TIME
D19 010 sec. TC probe signal readout average time 1 ÷ 60 D19
27 mA TC READING
D20 04.0 mA TC output current in mA D20
L TC READING
001 mg/m3 TC reading on display during test for mg/m3 adjustment Press D and B. See D18 1 ÷ 99 D18
A REAL EMISSION
001 mg/m3 Real TC emission during test for adjustment in mg/m3 Press D and B. See D18 1 ÷ 99 D18
6.1 DISPLAY INDICATIONS IN OPERATION
DISPLAY DESCRIPTION Code
dP = 1.06 kPa MAN Differential pressure reading (dP = xxx) and manual running mode (MAN) C3

7.1 DISPLAY INDICATIONS WITH ALARM
DISPLAY DESCRIPTION Code
E1 OVERLOAD
ELECTROVALVE 003 Overload alarm solenoid valves 3 B8b
E2 ACT. FAILED
ELECTROVALVE 003 Solenoid valve not activated - Solenoid valves 03 (option on request) B9x/B6x

5.1 ENTER DATA IN SET MODE
SETUP / DISPLAY DESCRIPTION Range Code Default
E3 BROKEN BAG
D11 ELECTROVALVE 003 Alarm for broken bag check ev 3 D11
E4 EMISSION TC
D12c OVER THRESHOLD Continuous emission of dust above the set threshold D12c
E5 PROBE SIGNAL
D12c TRIBO < 2mA TRIBO CHECK probe signal below 2 mA D12c
E6 COMPR. AIR
LACK D5a OPEN Cycle stop since no consent from compressed air pressure switch D5a
E7 MAXIMUM
dP ALARM Maximum dP alarm active. dP reading over SET 15 (See section 5.1) C7d
E8 MINIMUM
dP ALARM Minimum dP alarm active dP reading under SET 12. (See section 5.1) C7c
8.1 INFORMATION AND GUIDE ON THE DISPLAY

9.1 WIRING DIAGRAM

10.1 ELECTRONIC BOARD SIZE AND VOLTAGE SETTINGS

11.1 ENCLOSURE DIMENSIONS

12.1 PROBLEMS SOLUTIONS
DEFECT POSSIBLE CAUSE SOLUTION
Display OFF Fuse burnt.
Supply voltage.
Jumper for input voltage selection
Check the protection fuse on supply line.
Check if supply voltage is present and if it
agrees with supply voltage needed by the
device (clamps 1 and 2).
Check jumper JP1.
No output activation Output voltage.
Connection to the electrovalves.
Jumper for output voltage selection
Check that sequencer output voltage and
electrovalve coils have the same voltage.
Check the connection between sequencer
and electrovalves and do manual test of
the outputs (See B10 / B10b).
Check jumper JP2 and JP3.
Wrong differential pressure reading. Pneumatic connection not free.
Pipe damaged Disconnect the 2 pipe to the device and
verify that dP reading is 0.00 kPa. If it is
OK check the pipe for air connection from
the device to the filter.
The cleaning cycle do not run in according
to the set value. The memory of the microprocessor could be modified by external factor. Switch Off the supply voltage of the sequencer. Hold down key A and switch
on the supply voltage. By means of this
operation the default data are loaded in set
up. Adjust the zero dP reading and the
other parameters according to the filter's
needs.
13.1 WARRANTY
The warranty lasts 4 years. The company will replace any defective electronic component, exclusively at our laboratory, unless
otherwise agreed, upon the Company's prior consent.
WARRANTY EXCLUSION
The warranty is not valid in case of:
1) Tampering or unauthorized repairs.
2) Wrong use of the device, not in compliance with technical data.
3) Wrong electrical wiring.
4) Inobservance of the installation rules.
5) Use of the device, not in compliance with CE rules.
6) Atmospheric events (Lightning, electrostatic discharge), Overvoltage.
We reserve the right to make any change without notice.

Company name / Company name: ESA Electronic Engineering
Postal address / Postal address: Via Kennedy, 28
Postcode and City / Postcode and City: 20010 Mesero (MI)
Telephone / Telephone: [phone]
E-Mail address / E-Mail address: [email protected]
declare that the DoC is issued under our sole responsibility and belongs to the following product:
Apparatus model / Apparatus model: DC
Product Type / Product Type: Sequencer / Sequencer
Serial number / Serial number:
Object of the declaration / Object of the declaration: DC
The object of the declaration described above is in conformity with the relevant Union harmonisation legislation
The object of the declaration described above is in conformity with the relevant Union harmonisation legislation
Directives 2014/30/UE, 2014/35/UE and 2011/65/UE
Directives 2014/30/UE, 2014/35/UE and 2011/65/UE
The following harmonised standards and technical specifications have been applied:
The following harmonised standards and technical specifications have been applied:
Title / Title Date of standard / Date of standard
EN 60730-1 2011
EN 50581 2012
Signed for and on behalf of / Signed for and on behalf of
Mesero, 19 / 03 / 2021
Amministratore delegato / Managing directior
BELLINELLI GIANFRANCO