Estun E21S Installation Manual

E21S Shear Numerical Control Device
Installation Manual
V1.01
ESTUN AUTOMATION CO., LTD
Address : No.155 Jiangjun Road, Jiangning
Development Zone Nanjing P.R.C 211106
Postal code: 211106
TEL: 025-52785569
FAX: 025-52785966
WEB: www.estun.com
E-mail: [email protected]
Page 1 of 41
Document Revision Record
Seria
l No.
Versio
n No.
Revisio
n Date
Descriptio
n
Revised by
1
V1.00
2012-6-4
Initial
release.
Yao Qing
2
V1.01
2012-6-6
Update
Assembly
Drawings.
Yao Qing
Page 3 of 41
Approved by
Remarks
Preface
Target reader
This manual is applicable to operators of E21S shear numerical control device,
including:

Machine tool operators

Installation and maintenance personnel
Range of application
Installation and maintenance personnel can install and operate this device
properly by referring to this manual.
Regulation
The design of E21S shear numerical control device complies with the
following grade standard:

Grade standard of EMC test:
−
GBT 17626.2-2006 Electromagnetic compatibility(EMC) - Testing
and measurement techniques - Electrostatic discharge immunity test.
Grade 3, contact discharge ±4KV, air discharge ±8KV.
−
GBT 17626.4-2008 Electromagnetic compatibility - Testing and
measurement techniques - Electrical fast transient/burst immunity
test.
Grade 3, power port ±2KV, communication port ±1KV.
−
GBT 17626.3-2006 Electromagnetic compatibility - Testing and
measurement techniques - Radiated radio-frequency electromagnetic
field immunity test
Grade strength: 10V/m, criteria: Grade A.
−
GB/T 17626.8-2006 Electromagnetic compatibility(EMC) - Testing
and measurement techniques - Power frequency magnetic field
immunity test.
30A/m, 50~60HZ, criteria: Grade A.
−
RE Test, reference standard EN55011
Execute CLASS A standard.

Environmental test standard
−
Low temperature; refer to JB-T 8832-2001 General requirements for
numerical control systems of machine tools.
Page 5 of 41
0 ℃, 2hours. Low temperature store -20℃. Criteria: normal start up,
normal operation.
−
High temperature, refer to JB-T 8832-2001 General requirements for
numerical control systems of machine tools, 40 ℃, 2hours. High
temperature store 55℃. Criteria: normal operation.
−
Constant temperature wet, refer to JB-T 8832-2001 General
requirements for
numerical control systems of machine tools, 40 ℃, humidity
93%~95%, 2 hours. Criteria: normal operation.
−
Vibration impact, refer to JB-T 8832-2001 General requirements for
numerical control systems of machine tools.
Personnel
Only authorized and properly trained person is allowed to operate this
equipment. Any person without necessary training is not allowed to use this
control system, not even for temporary use.
Area of responsibility distributed for personnel participating in installing,
operating and servicing equipment shall be stipulated explicitly and be
confirmed eligible.
Page 6 of 41
Content
Preface .......................................................................................................................... 5
1 Specification............................................................................................................. 9
1.1 Display ................................................................................................................................... 9
1.2 Internal memory ..................................................................................................................... 9
1.3 Electrical specification ........................................................................................................... 9
1.4 Encoder specification ........................................................................................................... 10
2 Installation ............................................................................................................. 11
2.1 Annoucements before installation ........................................................................................ 11
2.2 Installation space and direction ............................................................................................ 11
2.3 Installation environment ...................................................................................................... 11
2.4 Installation dimension .......................................................................................................... 12
2.5 Installation layout................................................................................................................. 13
2.5.1 Layout of rear panel .................................................................................................... 13
2.5.2 Rear panel port description ......................................................................................... 13
2.5.3 Overall wiring scheme ................................................................................................ 14
2.5.4 Electrical wiring scheme ............................................................................................. 14
2.6 Definition of system interface .............................................................................................. 15
2.6.1 Definition of power interface ...................................................................................... 15
2.6.2 Definition of input interface........................................................................................ 15
2.6.3 Definition of external output interface ........................................................................ 17
2.6.4 Definition of encoder interface ................................................................................... 17
2.6.5 Definition of communication interface ....................................................................... 18
3 Parameter Description of Machine Tool .......................................................... 19
3.1 Enter parameter page ........................................................................................................... 19
3.2 Parameter specification ........................................................................................................ 21
4 Debugging .............................................................................................................. 23
4.1 Preparation before debugging .............................................................................................. 23
4.2 Debugging procedure ........................................................................................................... 23
4.3 Debugging ............................................................................................................................ 23
4.4 Actual processing ................................................................................................................. 25
5 Diagnosis ................................................................................................................ 26
Page 7 of 41
5.1 Enter diagnosis page ............................................................................................................ 26
5.2 Input diagnosis ..................................................................................................................... 27
5.3 Output diagnosis .................................................................................................................. 27
5.4 Keyboard diagnosis .............................................................................................................. 28
5.5 FRAM diagnosis .................................................................................................................. 28
5.6 Encoder diagnosis ................................................................................................................ 29
5.7 LCD diagosis ....................................................................................................................... 29
6 Maintenance ........................................................................................................... 31
6.1 Instructions to maintenance.................................................................................................. 31
6.2 Routine inspection................................................................................................................ 31
6.3 Periodic inspection ............................................................................................................... 32
7 Appendix ................................................................................................................ 35
7.1 External power description .................................................................................................. 35
7.2 Grounding design ................................................................................................................. 35
7.2.1 Ground classification in equipment cabinet ................................................................ 35
7.2.2 Equipment grounding design ...................................................................................... 36
7.3 Protective measures.............................................................................................................. 37
7.3.1 Measures to ensure electromagnetic compatibility ..................................................... 37
7.3.2 Instructions to E21S electricmagnetic compability installation .................................. 39
7.3.3 Install freewheeling diode on relay ............................................................................. 39
7.4 Demonstration of AC Asynchronism motor wiring ............................................................. 40
Page 8 of 41
1
Specification
1.1 Display
LCD display
Dimension of display window: 54.38mm*54.38mm
Dot matrix: 160*160
Status light
Green indicates running.
Red indicates stop.
1.2 Internal memory
Capable of storing 40 programs, each program includes 25 steps at most.
1.3 Electrical specification
POWER
Input voltage: DC24V±10%
Rated current: 1A
INPUT
Input voltage: DC24V±10%
Maximum input current: 10mA
OUTPUT
External voltage: DC24V±10%
Maximum current: 70mA
Page 9 of 41
Encoder power
Output voltage: DC12V±5%
Allowable maximum output current: 500mA
Absolute temperature:
Working temperature: 0~40℃
Storage temperature: -20~55℃
1.4 Encoder specification
Power supply is DC 12V.
Incremental encoder, single-ended output, with Z/C phase.
Voltage-type output.
Page 10 of 41
2
Installation
2.1 Annoucements before installation

Power supply must be off during installation and wiring.

Serious damage to the equipment may be caused by misconnection of
power supply terminals, improper connection of in-out lines and output
line short circuit. Therefore, before turning on the power supply, check
the connection of input output grounding and power supply wire. .

Grounding terminal of E21S shear numerical control device must be
grounded in correct way, with low impedance lower than 0.3Ω.

Do not dismantle the device without authorization so as to avoid
malfunction.

Electrical components inside the digital device are very sensitive to static
electricity, therefore do not put foreign matters or make them fall to the
inside of digital control device or touch the control circuit.

Please install E21S shear numerical control device in safe region. Avoid
high temperature, and direct sunlight, moisture and splash of oil drops or
water.

Do not use this device in place of high temperature, moisture
condensation, dust, oil smoke, conductive dust, corrosive gas or
flammable gas.
2.2 Installation space and direction
Generally, E21S shear numerical control device is embedded on control panel,
keep a distance of 65mm from its neighboring components and damper (shell)
on up and down, right and left, to facilitate operator install and maintain the
device.
2.3 Installation environment
Place free from water, vapor, dust or oily dust.
Place free from flammable, explosive or corrosive gas.
Place free from interference of strong electromagnetism or noise.
Page 11 of 41
Ambient temperature is between 0℃ - 40℃. When ambient temperature is
over 40℃, please put it in well-ventilated place.
Relative humidity is under 90% RH.
2.4 Installation dimension
The installation method is panel-mounting. Installation dimension and
drawings are shown in Figure 2-1.
Figure 2-1 Panel Installation Dimension
Page 12 of 41
2.5 Installation layout
2.5.1 Layout of rear panel
Rear panel block diagram is shown in Figure 2-2, consisting of power port
(POWER), input port (INPUT), output port (OUTPUT), encoder port (X,),
and communication port (COMM).
Figure 2-2 Rear panel layout
2.5.2 Rear panel port description
Rear panel port description is shown in Table 2-1.
Table 2-1 Rear panel port description
Socket
number
External port name
External port description
CN1
POWER
Input terminal of system power.
OUTPUT
13 way. 24VDC, maximum drive
capability 70mA, opto-coupler
isolation, maximum withstanding
voltage 40V.
INPUT
7 way. 24VDC, maximum load
10mA, opto-coupler isolation,
maximum withstanding voltage
40V.
CN3
CN2
Page 13 of 41
Socket
number
External port name
External port description
CN5
X-ENCODER
Incremental encoder is 12V
single-ended output, with pulse
frequency up to 100KHz.
Meanwhile, the port supplies
power externally (as input power
of encoder). The rated voltage is
12V, rated current 150mA, and
ripple voltage no higher than
100mV.
CN4
COMM
For updating the system software.
2.5.3 Overall wiring scheme
Overall wiring scheme is shown in Figure 2-3.
Figure 2-3 Overall wiring schemes
2.5.4 Electrical wiring scheme
Electrical wiring scheme is shown in Figure 2-4.
Page 14 of 41
Figure 2-4 Electrical wiring schemes
It is recommended to use the relay which contains diode on coil, avoid high
voltage damage the circuit when cutting inductive load.
Shield layer of the encoder cable shall be connected to ground, which is the
metal housing of the product, with low resistor.
2.6 Definition of system interface
2.6.1 Definition of power interface
Definition of terminal is shown in Table 2-2.
Table 2-2 Description of power terminal
Terminal No.
Signal
Description
1
24V
Input terminal of system power,
connect to DC +24V.
2
0V
Input terminal of system power,
connect to DC 0V.
3
PE
PE
2.6.2 Definition of input interface
Pin definition is shown in Table 2-3.
Page 15 of 41
Table 2-3 Definition of external output terminal
Terminal No.
Signal
Description
START
Step change signal, DC +24V
signal input, connect to upper dead
point signal generally, beam return
to upper dead point, +24V signal is
connected, system receive step
change signal, system callout the
next program and execute the
program.
PRESS
Back gauge retraction, signal, DC
+24V signal input, avoid
interfering work piece by gauge
device during work. System X axle
positioning is finished, and slider
gets away from upper dead point.
When slide just press against sheet,
retraction signal is connected.
Back gauge will yield some
distance to direction of up counting
(yield distance is determined by
program retraction value), avoid
interference by back gauge and
work piece. When bending is
finished and slide return, back
gauge will return from yield
position.
X-EOT
X-axle reference point signal, DC
+24V signal input, connect to rear
limit signal generally. When gauge
touches reference point switch,
+24V signal is connected.
5
COUNT
Piece counting signal, input
DC+24V signal, and connect to
upper dead point signal generally.
Slider return to upper dead point,
+24V signal is connected, one
count is completed. Then signal
must be connected, otherwise the
system will not operate normally.
6
NC1
Retain
7
MRDY
Retain
8
NC2
Retain
9
COM1
Common port of system input
signal must be connected to 0V of
I/O power.
1
2
3
Page 16 of 41
2.6.3 Definition of external output interface
Terminal definition is shown in Table 2-4.
Table 2-4 Definition of external output terminal
Terminal No.
Signal
Description
1
X--
X axle high speed reversal
2
X-
X axle low speed reversal
3
X+
X axle low speed forward
4
X++
X axle high speed forward
5
XIP
X axle in place
7
F1
F1 output
8
F2
F2 output
9
NC
Reserved
10
NC
Reserved
11
SRDY
System is ready to output
12
NC
Reserved
13
NC
Reserved
14
24V
Connect 24V+ of external IO
power
15
COM2
Common port of system output
signal must connect to 0V of I/O
power supply.
2.6.4 Definition of encoder interface
Encoder interface is DB-9 plug (female), definition of terminal is shown in
Table 2-5.
Table 2-5 Definition of encoder terminal
Communication mode
Pin No.
Signal definition
Incremental encoder
terminal
3
C
4
B
5
A
1, 6, 8, 9
GND
2, 7
12V
Page 17 of 41
GND of encoder cable can be connected to any pin among 1, 6, 8, 9.
VCC of encoder cable can be connected to either 2 or 7.
2.6.5 Definition of communication interface
The system has integrated RS232 serial interface, port adopts DB-9 plug
(male).
This RS232 is for upgrading system software only.
Terminal definition is shown in Table 2-6.
Table 2-6 Definition of communication terminal
Communication mode
Pin No.
Signal definition
RS232
2
TXD
3
RXD
5
GND
1, 4, 6, 7, 8, 9
Null
Page 18 of 41
3
Parameter Description of Machine
Tool
3.1 Enter parameter page
Steps to entering parameter page are as below.
Step 1 On Program Management page, click
to enter Programming Constant
page, as shown in Figure 3-1. On this page, program constant can be set.
Figure 3-1 Program Constant page
Step 2 Input the password 95656, click
page, as shown in Figure 3-2.
Page 19 of 41
to enter Parameter Setting
Figure 3-2 Parameter Setting page
Step 3 Select 1. System Parameter, then click
Parameter Setting page, as shown in Figure 3-3.
to enter system
Figure 3-3 System Parameter Setting page
SYS PARA
1/ 1PG
X-digits:
3
X-safe:
1.000
Step delay:
3333
Range：0~3
You can directly enter System Parameter Setting Page by input password 94343 and
click
on Program Constant page.
Step 4 As for setting methods of other parameters, refer to Step 3.
X-axle parameter. You can set up X-axle parameter.
Backup/recover. You can backup system by one key and recover the backup content.
----End
Page 20 of 41
3.2 Parameter specification
Parameter specification is shown in Table 3-1.
Table 3-1 Parameter specification
Parameter
name
Default
value
Parameter
range
Parameter description
Decimal places
of X axle
2
0~3
Decimal places indicated
by X axle parameter.
Metric/Inch
0
0 or 1

0: Metric

1: Inch

0: Chinese

1: English
Chinese/English
0
0 or 1
Decompression
delay
0
0~99999ms
Interval between valid
yield signal and unloading
output when system starts.
X axle teach
0
0~9999.999mm
Input current X axle
position when teach
enable.
X safe distance
0
0~9999.999mm
Keep low speed within
this range.
Step change
delay
0
0~9999ms
Interval between valid step
change signal and system
executing step change.
X axle enable
1
0 or 1

0: disable

1: enable

0: decreasing

1: increasing

0: disable

1: enable
X encoder
direction
0
X teach enable
0
0 or 1
0 or 1
X reference
position
20
0~9999.999mm
Position displayed when X
axle reference point is
found.
X minimum
10
0~9999.999
Minimum position of X
axle.
X maximum
500
0~9999.999
Maximum position of X
axle.
X multiple
factor
40
1~99999999
X axle multiple factor, for
conversion between pulse
and millimeter.
Page 21 of 41
Parameter
name
Default
value
Parameter
range
Parameter description
X divide factor
1
1~99999999
X axle divide factor, for
conversion between pulse
and millimeter.
X stop distance
0
0~9999.999mm
Advance stop range.
Motor stops and carries
out inertial motion when
enter this range.
X allowable
tolerance
0.05
0~99.999mm
Position tolerance,
in-place signal is output
when reaching this range.
X over travel
enable
0
0 or 1

0: disable

1: enable
X over travel
distance
10
0~9999.999mm
Over travel distance, valid
when positioning both
sides.
X repeat enable
0
1~99999999

0:disable

1:enable
X repeat time
50
0~9999ms
Interval of back gauge
reposition when repeat
position.
X conversion
distance
50
0~9999.999mm
Conversion distance
between high speed and
low speed. Motor lowers
speed when enter this
range.
X stop time
0
0~9999ms
Back gauge reaches
advance stop range. Due
to inertia, back gauge will
not stop immediately after
motor stops. The time for
back gauge to stop.
X over travel
wait
0
0~9999ms
Interval between back
gauge reach over travel
position and input motor
signal.
X drive mode
0
0 or 1

0: frequency converter

1: common motor
Page 22 of 41
4
Debugging
4.1 Preparation before debugging

Check E21S power line, ground wire, input/output signal wire and
encoder plug for reliable and accurate connection.

Check whether output voltage of 24V switch power is normal or not.
4.2 Debugging procedure
Step 1 Check power supply and ground wire before power on the system.
Step 2 Enter X axle parameter set page respectively, set parameter.
Step 3 Enter diagnostic interface, check system input signal. When there is input
signal, the corresponding input indication is filled; otherwise, input signal is
not connected.
Step 4 Enter diagnostic interface, check system output signal. When there is output
signal, the corresponding output indication is filled. If machine tool fails to
operate normally, check electrical parts of the machine tool.
----End
4.3 Debugging
Step 1 Set up E21S system parameters.
X axle parameter set (Refer to parameter specification for details)

X axle enable: 1 (axle enable is on)

Encoder direction: 1 (Decreasing counting direction)

Reference: 1 (X axle homing is on)

Reference point position: 10.00

Minimum: 10.00 (X axle minimum)

Maximum: 500.00 (X axle maximum, this value is determined by gauge
length)

Multiple factor: 40

Divide factor: 1

Advance stop time: 0.20
Page 23 of 41

In-place tolerance: 0.02

Bilateral positioning enable: 1

Over travel distance: 5.00

Repeat positioning enable: 1

Repeat positioning time: 1.00

Advance stop range: 100

Conversion distance between high and low speed: 4000

Bilateral positioning enable: 1
Step 2 X axle debugging.

Action debugging
1.
Press “+” to observe whether X axle moves backward. If the moving
direction is opposite, then adjust phase sequence of X axle motor.
2.
Make sure whether counting direction of encoder is correct. If it is
incorrect, revise Parameter-encoder direction.
3.
Press “-” and “++--” to make sure whether opposite direction moving
and high speed moving is correct.
4.
Make sure whether front and rear limit function in correct way.

Precision debugging
1.
When “Intelligent positioning enable” is 0: utilize single step procedure,
to modify X axle setting position from big to small. Press “Running” key
to move X axle from back to front. If the location after position is bigger
than setting place, then decrease “advance stop range”, otherwise,
increase “advance stop range”. This process may be adjusted many times
until the difference between actual position and setting position is less
than 0.1.
2.
When “Intelligent positioning enable” is 0: utilize single step procedure,
to modify X axle setting position from big to small. Press “Running” key
to move X axle from back to front. If the location after position is bigger
than setting place, then decrease “over travel distance”, otherwise,
increase “over travel distance”. This process may be adjusted many times
until the difference between actual position and setting position is less
than 0.1.
3.
When “Intelligent positioning enable” is 1: over travel enable shall be set
to 1, setting over travel distance shall exceed advance stop range. Start
system, observe whether system will return to over travel distance and
start to position after fail to reach tolerance range in completion of
positioning.
Step 3 Counting debugging.
Edit multistep program on programming interface (setting number of work
piece is over 1, single step is excluded), press “Start”, depress pedal to dry
running when X, axle is in place , observe whether counting has increased; if
no change occurs, check whether START, COUNT signal wires are correctly
and reliably connected to the system.
Step 4 Yield debugging.
Edit single-step program on programming interface (yield parameter is 5mm),
press “Start”, depress pedal to dry running when X axle is in place. observe
whether there is yield and yield sequence is correct. If problem is found,
Page 24 of 41
check whether R signal wire (IN2) is correctly and reliably connected to the
system, and whether yield distance (Dx value) set is correct and reasonable.
----End
4.4 Actual processing
When the above procedures are finished, roughly correct actual position of X
axle by teaches function. Edit single step program to carry out actual
processing, measure dimension of the processed work piece, then correct scale
error by teach function.
When debugging, watch carefully whether motor runs normally or mechanical
impacts may be caused. If necessary, cut down motor power immediately to
avoid accident.
Page 25 of 41
5
Diagnosis
5.1 Enter diagnosis page
This system provides diagnosis tests for input, output, keyboard, FRAM,
encoder and LCD, etc.
When diagnosis is in progress, please make sure oil pump is not started.
Steps to enter diagnosis page are as follows:
Step 1 Power on, system stays on single-step programming page, Stop Indicator is
on.
Step 2 Double click
to enter programming constant page, input password
97878, click
to enter diagnosis page, as shown in Figure 5-1.
Figure 5-1 Diagnosis page
DIAGNOSE
1. IN
DIAG.
2. OUT DIAG.
3. KEY DIAG.
4. FRAM DIAG.
5. Enc. DIAG.
6. LCD DIAG.
----End
Page 26 of 41
5.2 Input diagnosis
On “System diagnosis”, select “1. Input diagnosis” to enter diagnosis page, as
shown in Figure 5-2. IN01－6 on the page is input corresponding to 1-6 way.
When system detects input signal, the corresponding terminal is on.
Figure 5-2 Input diagnosis page
5.3 Output diagnosis
On “System diagnosis”, select “2. Output diagnosis” to enter diagnosis page,
as shown in Figure 5-3. OUT01－13 on interface is output corresponding to
1-13 way. Use cursor key to select output terminal, press
output terminal is open and on.
Figure 5-3 Output diagnosis page
OUT DIAG.
O01
O06
O11
O02
O07
O12
O03
O08
O13
O04
O09
O05
O10
Please press `±`
Page 27 of 41
, the selected
5.4 Keyboard diagnosis
On “System diagnosis”, select “3. Keyboard diagnosis” to enter keyboard
diagnosis page, as shown in Figure 5-4. Press key, screen will display
corresponding key name.
Figure 5-4 Keyboard diagnosis page
5.5 FRAM diagnosis
On “System diagnosis”, select “4. FRAM diagnosis” to enter storage
diagnosis page, as shown in Figure 5-5. Click
diagnosis, as shown in Figure 5-6.
Figure 5-5 Storage diagnosis page
Page 28 of 41
to enter storage
Figure 5-6 Storage diagnosing page
5.6 Encoder diagnosis
On “System diagnosis” interface, select “5.Enc. Diagnosis” to enter encoder
diagnosis interface, as shown in Figure 5-7. Rotate encoder, the page will
display corresponding pulse change. C pulse signal will jump between 0 and
1.
Figure 5-7 Encoder diagnosis page
ENC. DIAG.
Encoder1:
Encoder1 C：
Encoder2:
Encoder2 C：
0
0
0
0
5.7 LCD diagosis
On “System diagnosis”, select “6.LCD diagnosis” to enter LCD diagnosis
interface, as shown in Figure 5-8. Press
Page 29 of 41
to carry out LCD diagnosis.
Figure 5-8 LCD diagnosis page
Page 30 of 41
6
Maintenance
6.1 Instructions to maintenance
In order to use this system safely and properly, follow the instructions.

When power is on or system operates normally, do not open cover plate or panel
as it may damage the components.

Wiring and inspection shall be done by professionals.

Don’t touch IC pin or contact of joint.

Do not place system on metal product that may cause power leakage, or on wood,
plastic or vinyl product which has static electricity.

If self-diagnosis error occurs to the system, determine details in accordance with
warning instructions and eliminate causes to error. Ensure safety. Rerun when
warning is removed. (Refer to Appendix 1 Warning list and instructions)

Before operation, determine and adjust program and each parameter.

Do not add voltage values excluded in operating manual on any binding post.
Otherwise damage or breakage may be caused.

Do not misconnect terminals. Otherwise damage or breakage may be caused.

Do not mistake polarity (+/-). Otherwise damage or breakage may be caused.

Control line and communication cable shall not be together with or close to
principal line and power harness. Their distance between each other shall be over
100mm during installation.
6.2 Routine inspection
For routine inspection, please refer to Table 6-1.
Page 31 of 41
Table 6-1 Routine inspection
No.
Inspection
item
Standard
content
Standard
specification
Treatment
1
Basic
installation
status of the
system
Check set
screw for
loosening, and
check seal for
drop.
Be installed
properly.
Fasten
screw.
2
IO port
connection
status
Check IO port
connection for
loosening
Correct wiring.
Correct
wiring.
3
Connection
status
Check terminal
screw for
loosening
Screw is not
loose
Fastening
terminal
screw.
4
LED display
status
Check whether
LED display is
correct.
LED (green)
indicate system
running, LED
(red) indicate
system stop.
6.3 Periodic inspection
Items which require once or twice inspection every 6 months or 1 year are listed
below. In case of equipment removal or reconstruction, or any changes to wiring,
inspection is also required. Please refer to Table 6-2for inspection content.
Table 6-2 Periodic inspection content
No.
Inspection item
Standard
content
Standard
specificatio
n
1
Surrounding environment
Measure by
thermometer
and
hygrometer,
and measure
whether
corrosive gas
exists.
0~40℃
Voltage
among
terminals 24V
DC
20~29V DC
2
Ambient
temperature
Ambient
humidity
Air
Voltage
Page 32 of 41
Treatment
5~95%RH
No corrosive
gas
Change
power
supply
No.
Inspection item
Standard
content
Standard
specificatio
n
Treatment
3
Install
Tension,
mobility
Mobile
module
Module must
be installed
securely.
Secure the
screw. If
CPU and
I/O module
looses,
fasten them
by screws.
Dust and
foreign
matter
attachmen
t
Visual
observation
No dust or
foreign matter
is allowed.
Remove and
clean.
Tightness
of
terminal
screw
Rotate by
screwdriver
No loosening
Screw
Whether
compressi
on type
terminal is
close
Visual
inspection
Compression
type terminal
must be fixed
between
proper
intervals.
Adjust
Tightness
of joint
Visual
inspection
No loosening
Tighten
screw
Multimeter,
visual
inspection
Whether
contact
pull-in is
normal. Coil
resistance
Replace
relay.
4
5
Connecti
on status
Relay
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7
Appendix
7.1 External power description
It is recommended to use two 24V power supplies, one for supplying power to the
system, the other for supplying power to input/output terminal.
Two DC power supplies shall be isolated safely from AC power grid (switch-mode
power supply is recommended), and comply with EN60950 standard. Ensure safe
isolation and avoid electric shock.
System power supply: rated voltage 24V±10%, rated current no less than 1A.
Power supply connected to OUTPUT, INPUT terminals: rated voltage 24V±10%,
rated current no less than 1.0A (when all IO ports are in conducting state, maximum
current required is 1.0 A).
Output voltage of some switch power supply can be adjusted. Before use, output
voltage must be adjusted within the above mentioned range, otherwise, internal
circuit of the controller may be damaged.
7.2 Grounding design
7.2.1 Ground classification in equipment cabinet
Ground in equipment cabinet is divided into three categories:

Signal ground: for example, signal reference in E21S controller.

Shield ground: the shield layer of communication cable can prevent the system
from external interference and hinder internal noise interfere other equipment.
The ground shield layer connected to is called shield ground, must connect to
protective ground.

Protective ground: shield ground of each equipment inside the cabinet is
connected somewhere, such as grounding bar. The grounding bar connects to
earth.
If signal ground and protective ground of the equipment are not directly connected
but isolated by high resistance return circuit, then this is floating ground equipment.
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Floating ground equipment can isolate power interference, improve system immunity
from interference significantly and ensure reliable and stable operation.
7.2.2 Equipment grounding design
E21S Internal circuit grounding
E21S is floating ground equipment. The signal ground is isolated from ground by
high resistance return circuit (LC filter network, optical coupler, RC network).
To avoid static electricity accumulation by system or high frequency interference,
signal ground is usually connect to the ground by RC net.
RC network of E21S is integrated inside the product with one end connect to signal
ground, and the other end connect to ground (three pins of POWER terminal), as
shown in Figure 7-1.
Figure 7-1 Internal Grounding Diagram
E21S Enclosure grounding
E21S enclosure is conductive metal, and must be low resistance grounding, which
can effectively reduce short circuit or danger caused by system fault. Low resistance
grounding can also significantly reduce external interference to system or system
interference to the outside.
Principal measures of E21S enclosure grounding are: there is a grounding terminal
outside of enclosure. The terminal must be grounded, with grounding resistance no
higher than 0.3 ohm. Grounding terminal location is shown in Figure 7-2.
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Figure 7-2 Location of enclosure grounding terminal
Power terminal grounding
There is a PE pin on power terminal. This pin must ground well, and ground
resistance is no higher than 0.3ohm.
Cable shield layer grounding
If encoder cable has shield layer, both ends of the shield layer must ground well,
suppress external interference effectively, and enhance system reliability. Do not
pigtail the shield layer.
For cable shield layer grounding, if ground potentials of both ends are not equal, it
will result in current in shield layer. In such case, treat the ground and lower
potential difference.
7.3 Protective measures
7.3.1 Measures to ensure electromagnetic compatibility
E21S and its components are specially designed for industrial environment with
strong electromagnetic compatibility. But when install and operate, take possible
interference by the outside into account, and improve reliability and stability of the
system.
Common external interference sources

High inductive load, such as contactor and relay. Strong electromagnetic
interference will be generated at the cut-off moment;

Frequency converter, servo driver and motor will generate strong
electromagnetic interference.
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Ways to interfere coupling
Ways to interfere coupling are shown in Table 7-1.
Table 7-1 Ways to interfere coupling
Coupling
mode
Cause
Typical cases
Direct electric
coupling
Two or more
circuits use one
guide line
Many equipment share one power
supply;
Capacity
coupling
Capacity coupling
will generate
between any two
conductors.
When cables are laid in parallel,
especially when strong and weal
current are in parallel, strong
current will affect weak current.
Inductive
coupling
Changing current
flows through
current loop.
Transformer;
Electrostatic discharge, etc.
Contactor and relay pull-in or
disconnect;
High frequency signal cable, etc.
Radio
frequency
coupling
Space
electromagnetic
field makes guide
line generate
induced voltage
current.
Measures to ensure electromagnetic compatibility
1.
Low resistance grounding: make sure uncharged metal parts (such as enclosure,
shield layer) are ground well. Earth conductor connects to grounding bar inside
cabinet. Grounding bar shall connect the ground by low resistance,
anti-corrosion and make sure good electrical conductivity;
2.
Cabling in correct way
3.
4.
−
Cables must be sorted: high-tension line, power line, encoder cable, and
signal line (such as input and output cable).
−
Cables of different kinds shall lay separately and keep distance to the
greatest extent, high-tension line in particular. Do not lay together with
power line, encoder cable and signal line.
−
Encoder cable shall be kept away from power line and signal line to the
largest extent.
Connect to shield layer correctly
−
Encoder cable shall have shield layer. Both ends of shield layer must
connect to protective ground.
−
Connected area of shield layer and protective ground shall be as low as
possible. Do not twist the shield layer into a rope. Connect to protective
ground.
−
The smaller resistance between shield layer and protective ground, the
better.
Other requirement
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−
Inductive load, frequency converter and servo driver inside the cabinet shall
be kept away from power line, encoder cable and signal line.
−
Earth potential difference between different equipment is the smaller the
better, theoretically, zero is the best.
7.3.2 Instructions to E21S electricmagnetic compability
installation
1.
E21S may be installed outside the cabinet. If work environment is poor, keep
E21S close to cabinet as much as possible.
2.
Metal housing shall connect to protective ground via earth conductor, and
ground resistance shall be no higher than 0.3 ohm.
3.
Cabinet must be ground well to avoid personal injury or death caused by
electricity leakage.
4.
Power line, encoder cable and signal line must be away from strong current and
inductive load. Do not lay in parallel.
5.
Signal line (I/O port cable) is the shorter the better. If long distance wiring is
required, try to keep away from strong interference source.
6.
Two 24V power supplies are recommended, one for supply power to internal
circuit, the other for IO port power supply.
7.
Encoder cable uses shield line. The shield layer and metal housing connect to
each other in large area. Try to avoid “pigtail” connection.
7.3.3 Install freewheeling diode on relay
When inductive load is cutoff, instant high voltage will generate, such as coil and
contactor of relay.
To avoid damage to system circuit by high voltage, necessary protection measures
must be taken.
E21S output port load is DC relay, protective measures are as follows:
Add bleeder diode on coil, clamp voltage on both ends of coil. But some off-delay
will be caused.
Figure 7-3 Relay coil connect freewheel diode
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7.4 Demonstration of AC Asynchronism motor wiring
Demonstration of AC asynchronism motor wiring is shown in Figure 7-4.
Page 40 of 41
Figure 7-4 Demonstration of AC asynchronism motor wiring
Page 41 of 41