Mitsubishi MELSEC-A A1S68AD User manual

User's Manual
(Hardware)
A1S68AD
Thank you for purchasing the Mitsubishi programmable controller
MELSEC-A Series.
© 2008 MITSUBISHI ELECTRIC CORPORATION
Analog-Digital
Converter Module
Prior to use, please read both this manual and detailed manual
thoroughly to fully understand the product.
Model A1S68AD-U-HW
MODEL
CODE 13JY17
IB(NA)-0800371-C(1112)MEE

A-1
SAFETY PRECAUTIONS
(Always read before starting use)
When using Mitsubishi equipment, thoroughly read this manual and the
associated manuals introduced in the manual. Also pay careful attention to safety
and handle the module properly.
The instructions given this manual are concerned with this product. Refer to the
User’s Manual of the CPU module in use for details on the safety instructions for
the programmable controller system.
In this manual, the safety precautions are classified into two levels:
" WARNING" and " CAUTION".
Depending on circumstances, procedures indicated by may
also be linked to serious results.
In any case, it is important to follow the directions for usage.
Store this manual in a safe place so that you can take it out and read it whenever
necessary. Always forward it to the end user.
[DESIGN PRECAUTIONS]
zDo not bundle the control wire and the communication cable with the main
circuit or power line or keep them close to one another.
Keep the control wire and the connection cable at least 100mm (3.94inch)
away from the main circuit or power line: otherwise, noise or malfunctions will
occur.
WARNING
Indicates that incorrect handling may cause
hazardous conditions, resulting in death or severe
injury.
Indicates that incorrect handling may cause
hazardous conditions, resulting in minor or moderate
injury or property damage.
CAUTION
CAUTION
CAUTION

A-2
[INSTALLATION PRECAUTIONS]
[WIRING PRECAUTIONS]
zUse the programmable controller in an environment that meets the general
specifications in the user's manual for the CPU module used.
Failure to do so may cause an electric shock, fire, malfunction, or damage to
or deterioration of the product.
zInsert the tabs at the bottom of the module into the holes in the base module
before installing module. Be sure to install the module in the base module with
screws tightened to the specified torque.
Improper installation may cause erroneous operation, accident, or the module
to fall out.
zBefore connecting wires to the PLC, check the rated voltage and the terminal
arrangement.
Connecting power of a different voltage or wiring incorrectly will result in fire or
failure.
zTighten the terminal screws within the specified torque range.
Undertightening can cause a short circuit or malfunction.
Overtightening can cause a short circuit or malfunction due to damage of the
screws or module.
zTake all possible measures to prevent chips or wire scraps from entering the
module.
Entry of foreign material will cause fire, failure of malfunctions.
CAUTION
CAUTION

A-3
[STARTING AND MAINTENANCE PRECAUTIONS]
[DISPOSAL PRECAUTIONS]
zDo not touch the terminals while they are live.
This will cause malfunctions.
zMake sure to switch all phases of the external power supply off before
cleaning or re-tightening the terminal screws. Failure to do so will cause
failure or malfunction of the module.
Not doing so can cause failure or malfunction of the module.
zDo not disassemble or tamper will the module.
This will cause failure, malfunctions, injuries or fire.
zMake sure to switch all phases of the external power supply off before
mounting or removing the module.
Failure to do so will cause failure or malfunction of the module.
zIf a voltage is input when a current input range is selected, failure may occur.
zDo not install/remove the terminal block more than 50 times after the first use
of the product. (IEC 61131-2 compliant)
zAlways make sure to touch the grounded metal to discharge the electricity
charged in the body, etc., before touching the module.
Failure to do so may cause a failure or malfunction of the module.
zWhen disposing of the product, treat it as industrial waste.
WARNING
CAUTION
CAUTION

A-4
CONDITIONS OF USE FOR THE PRODUCT
(1) Mitsubishi C Controller system ("the PRODUCT") shall be used in
conditions;
i) where any problem, fault or failure occurring in the PRODUCT, if any, shall
not lead to any major or serious accident; and
ii) where the backup and fail-safe function are systematically or
automatically provided outside of the PRODUCT for the case of any
problem, fault or failure occurring in the PRODUCT.
(2) The PRODUCT has been designed and manufactured for the purpose of
being used in general industries.
MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY
(INCLUDING, BUT NOT LIMITED TO ANY AND ALL RESPONSIBILITY OR
LIABILITY BASED ON CONTRACT, WARRANTY, TORT, PRODUCT
LIABILITY) FOR ANY INJURY OR DEATH TO PERSONS OR LOSS OR
DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE
OPERATED OR USED IN APPLICATION NOT INTENDED OR EXCLUDED
BY INSTRUCTIONS, PRECAUTIONS, OR WARNING CONTAINED IN
MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY MANUALS,
TECHNICAL BULLETINS AND GUIDELINES FOR the PRODUCT.
("Prohibited Application")
Prohibited Applications include, but not limited to, the use of the PRODUCT
in;
• Nuclear Power Plants and any other power plants operated by Power
companies, and/or any other cases in which the public could be
affected if any problem or fault occurs in the PRODUCT.
• Railway companies or Public service purposes, and/or any other cases
in which establishment of a special quality assurance system is
required by the Purchaser or End User.
• Aircraft or Aerospace, Medical applications, Train equipment, transport
equipment such as Elevator and Escalator, Incineration and Fuel
devices, Vehicles, Manned transportation, Equipment for Recreation
and Amusement, and Safety devices, handling of Nuclear or
Hazardous Materials or Chemicals, Mining and Drilling, and/or other
applications where there is a significant risk of injury to the public or
property.

A-5
Notwithstanding the above, restrictions Mitsubishi may in its sole discretion,
authorize use of the PRODUCT in one or more of the Prohibited
Applications, provided that the usage of the PRODUCT is limited only for
the specific applications agreed to by Mitsubishi and provided further that
no special quality assurance or fail-safe, redundant or other safety features
which exceed the general specifications of the PRODUCTs are required.
For details, please contact the Mitsubishi representative in your region.

A-6
REVISIONS
* The manual number is given on the bottom right of the cover.
© 2008 MITSUBISHI ELECTRIC CORPORATION
Print Date *Manual Number Revision
Mar., 2008 IB(NA)-0800371-A First edition
May,2008 IB(NA)-0800371-B Partial correction
Chapter 3
Dec.,2011 IB(NA)-0800371-C Partial correction
SAFETY PRECAUTIONS,
COMPLIANCE WITH EMC AND LOW
VOLTAGE DIRECTIVES, Chapter 2
Addition
SAFETY PRECAUTIONS (Chinese),
CONDITIONS OF USE FOR THE
PRODUCT
This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.

A-7
CONTENTS
1. General Description ....................................................................................... 1
2. Performance Specifications ........................................................................... 2
3. Nomenclature and Settings ........................................................................... 4
4. Caution on Handling ...................................................................................... 7
5. Wiring ............................................................................................................. 8
5.1 Cautions on Wiring .................................................................................. 8
5.2 Module connection example .................................................................... 9
6. Outside Dimensions ..................................................................................... 11

A-8
About the Manuals
The following product are available for this equipment.
Refer to the table given below to choose suitable manuals.
COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES
(1) Method of ensuring compliance
To ensure that Mitsubishi programmable controllers maintain EMC and Low
Voltage Directives when incorporated into other machinery or equipment,
certain measures may be necessary. Please refer to one of the following
manuals.
• User's manual for the CPU module used
• User's manual (hardware) for the CPU module or base unit used
The CE mark on the side of the programmable controller indicates
compliance with EMC and Low Voltage Directives.
(2) Additional measures
No additional measures are necessary for the compliance of this product
with EMC and Low Voltage Directives.
Detailed Manual
Manual name Manual No.
(Model code)
Analog-Digital Converter Module type A1S68AD User's
Manual
IB-66576
(13J757)

1
1. General Description
This manual provides the specifications and part names of the analog-digital
converter module type A1S68AD (hereinafter referred to as "A1S68AD"),
which is designed to use with the MELSEC-A series CPU module.

2
2. Performance Specifications
The following table shows the performance specifications of the A1S68AD.
*1: The switch is set to an analog input value of 0 to +10V on delivery.
*2: The maximum conversion speed is 1ms/channel on all channels if
averaging processing is set even for only one channel.
*3: For the selecting method of voltage input or current input, refer to
Chapter 3.
*4: Current value indicates value of instant input current that does not
break module inner electrical resistance.
Item Specification
Analog input Voltage:-10 to 0 to +10 VDC (input resistance : 1M or more)
Current:0 to +20mA (input resistance : 250 )
Digital output 16-bit signed binary
I/O characteristics *1
Analog input value Digital output value
0 to +10V
-10 to 10V
0 to 5V or 0 to 20mA
1 to 5V or 4 to 20mA
0 to +4000
-2000 to +2000
0 to +4000
0 to +4000
Maximum resolution
Analog input value Digital output value
0 to +10V
-10 to 10V
0 to 5V
1 to 5V
0 to 20mA
4 to 20mA
2.5mV
5mV
1.25mV
1mV
5A
4A
Overall accuracy
(accuracy to full scale) Within 1% (Digital output value 40)
Maximum conversion time 0.5ms/1 channel *2
Absolute maximum input Voltage: 35V Current: 30mA *4
Number of analog input
points 8 channels/1 module
Insulation method Between input terminal and PLC power supply: Photocoupler
insulation (Between channels: Not insulated)
Number of occupied I/O
points Special, 32 points
Connection terminal 20-terminal block
External power supply Unnecessary
Applicable wire size 0.75 to 1.5mm2
Applicable solderless
terminal R1.25-3, 1.25-YS3, RAV1.25-3, V1.25-YS3A
Internal current
consumption (5VDC) 0.4A
Weight 0.27 kg
*3

3
Refer to the user's manual for the CPU module in use for details on the
general specifications.
POINT
The overall accuracy is applicable to the following analog input ranges:
Voltage: -10 to 0 to +10V
Current: 0 to +20mA

4
3. Nomenclature and Settings
The following gives the Names and settings of each section for each part of
the A1S68AD
In this manual, modules whose hardware versions V or later are used for
description.
For the names and settings for each part of modules whose hardware
version U or earlier, refer to the Analog-Digital Converter Module type
A1S68AD User's Manual (IB-66576).
A1S68AD
RUN
+
2
-
+
AG
AG
-
C
H
1
C
H
2
+
-
+
-
C
H
3
C
H
4
AG
AG
+
-
+
A/D
0 10V
0 20mA
A1S68AD
-
C
H
7
C
H
8
+
-
+
-
C
H
5
C
H
6
4
6
8
10
12
14
16
18
20
1
3
5
7
9
11
13
15
17
19
1)
2)
SW1
SW3
SW2
3)
4)

5
No. Name and appearance Description
1)
“RUN” LED Displays the operating status of the A1S68AD.
On :Normal operation.
Flash :Write disabled error or average time/count setting error.
Off :5 V power cut or watchdog timer error.
2)
Input range selector
switch SW1
Used to set the input range of each channel.
(Factory default: 0 to 10V)
The DIP switch numbers 1-8 correspond to the channel numbers.
3)
Input range selector
switch SW2 Setting of CH1
Input Range SW1-1 SW2-1 SW3-1
-10 to 10V OFF OFF
OFF
0 to 10V ON
0 to 5V OFF ON
1 to 5V ON
0 to 20mA OFF ON
ON
4 to 20mA ON
Setting disabled OFF OFF
Setting disabled ON
Set CH2-CH8 in the same manner.
4)
Input range selector
switch SW3
RUN
12345678
ON
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
12345678
ON
SW1
12345678
ON
SW2
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
ONOFF
SW3

6
Caution
If voltage input appears when a current input range is selected, a
failure may occur.

7
4. Caution on Handling
(1) The module case and the terminal block are made of resin.
Do not drop the module or subject it to shock.
(2) Do not remove the printed circuit board from the module case.
This could cause failure.
(3) During wiring, take all possible measures to prevent wire scraps or
foreign matter from entering the module.
If anything enters the module, remove it completely.
(4) Tighten the module mounting screws and the terminal screws to the
torques specified in the following table:
Screw Tightening torque range (N•cm)
Module installation screw (M4 screw) 78 to 118
Terminal block terminal screw (M3.5 screw) 59 to 88
Terminal block mounting screw (M4 screw) 78 to 118

8
5. Wiring
This section gives the cautions on wiring and connection example for the
module.
5.1 Cautions on Wiring
To establish a highly reliable system by making the best use of the
A1S68AD functions, external wiring that is not susceptible to the effects
of noise is required.
The cautions on external wiring are presented below:
(1) Use separate cables for AC input current and external input signals to the
A1S68AD. This can prevent the effects of surge or induction of the AC
input current.
(2) Keep the external wiring at lease 10cm away from the main circuit, high-
voltage wires or load-carrying wires other than those extending from the
PLC: otherwise, the wiring will be affected by noise, surge or induction.
(3) Generally, ground the shielded wire or shielded cable at one point on the
PLC CPU. However, depending on the external noise level, it may be
advisable to ground it an external location.

9
5.2 Module connection example
The figure below shows an example of voltage input and current input
connections.
*1: Use a 2-pole twist shielded wire.
*2: Represents the input resistors of the A1S68AD. (For voltage input,
turn off the 250 resistor with the Input range selector switch.)
*3: If the external wiring causes noise or ripple, connect a capacitor of
0.1 to 0.47 F (25V or more voltage resistance parts) between the V
and COM terminals.
(2) Current input
Signal source:0 to +20mA
(1) Voltage input connection
Signal source 0 to 10V
CH1
*3
*1 Shield wire
-
AG
+
*2
*4
CH8
*1 Shield wire
-
AG
+
*2
*4
GND
GND
250
1M or more
1M or more
1M or more
1M or more

10
*4: AG is the GND terminal of the analog circuit. Connecting it to the
GND terminal of an external device is not mandatory, but a higher
level of accuracy may be obtained when it is connected.
If there are three or more channels of the input range of -10 to 10V
and the external devices connected to the channels shares a
common line, the AG terminal must be connected the shared
common line of the external device.
(See the figure below.)
POINT
When the current input is selected, do not connect the sink type output
device and the source output device together. If this happens, normal
A/D conversion value cannot be stored.
AG
AG
AG
10V
10V
-10V
+10V
0V
+10V
0V
-10V
0V
AG terminal

11
6. Outside Dimensions
130 (5.12)
34.5 (1.36)93.6 (3.69)6.5
(0.26)
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
A1S68AD
RUN
Unit:mm(inch)