Mitsubishi AJ65BT-68TD User manual

AJ65BT-68TD Thermocouple Temperature Input Module
User,s Manual
Mitsubishi Programmable Controller

SAFETY PRECAUTIONS
(Read these precautions before using.)
When using Mitsubishi equipment, thoroughly read this manual and the associated manuals introduced
in this manual. Also pay careful attention to safety and handle the module properly.
These precautions apply only to Mitsubishi equipment. Refer to the CPU module user's manual for a
description of the PLC system safety precautions.
These SAFETY PRECAUTIONS classify the safety precautions into two categories: "DANGER" and
"CAUTION".
DANGER
Procedures which may lead to a dangerous condition and cause death or
serious injury if not carried out properly.
CAUTION
Procedures which may lead to a dangerous condition and cause superficial
to medium injury, or physical damage only, if not carried out properly.
Depending on circumstances, procedures indicated by CAUTION 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]
DANGER
 When there are communication errors with the data link, the data of the master module will be held.
Built an interlock circuit into the sequence program that will make sure the system operate safely by using
the communication status information.
CAUTION
 Do not bunch the control wires or communication cables with the main circuit or power wires, or them close
to each other.
They should be installed 100 mm (3.9 in.) or more from each other.
Not doing so could result in noise that would cause malfunction.

[INSTALLATION PRECAUTIONS]
CAUTION
 The module should be used under the environmental conditions listed under the general specifications in
the manual.
Using it under any other environmental conditions could cause problems such as fire, malfunction and
damage to or deterioration of the product.
 The module should be fixed securely with a DIN rail or installation screws, and then make sure to tighten it
within the range of the specified torque of the installation screws.
If the screws are loose, it may result in fallout or malfunction.
Tightening the screws too far may cause damages to the screws and/or the module, resulting in fallout or
malfunction.
 Do not directly touch the module's conductive parts.
Doing so could cause malfunction or trouble in the module.
[WIRING PRECAUTIONS]
CAUTION
 Before beginning any installation or wiring work, make sure all phases of the power supply have been
obstructed from the outside.
Failure to completely shut off the power supply phases may cause damages to the module or malfunction.
 When turning on the power or operating the module after installation or wiring work, be sure the
module’sterminal covers are correctly attached.
Failure to attach the terminal covers may result in short circuit or failure.
 The FG terminals should always be grounded using the class-3 or higher grounding designed specially for
the PLC.
Failure to ground these terminals may cause malfunction.
 Use applicable solderless terminals and tighten them with the specified torque. If any solderless spade
terminal is used, it may be disconnected when the terminal screw comes loose, resulting in failure.
 When wiring the module, check the rated voltage and terminal layout of the wiring, and make sure the wiring
is done correctly.
Connecting a power supply that differs from the rated voltage or wiring it incorrectly may cause fire or
failure.
 Tighten the terminal screws within the range of specified torque.
If the terminal screws are loose, it may result in short circuit or malfunction.
Tightening the terminal screws too far may cause damage to the screws and/or the module, resulting in
short circuit or malfunction.
 Be sure there are no foreign substances such as sawdust or wiring debris inside the module.
Such debris could cause fire, failure or malfunction.

[WIRING PRECAUTIONS]
CAUTION
 Be sure that the wires or cables connected to the module are stored in the duct or fixed with cramps.
Failure to do so may cause a damage to the module or cables due to dangling, shifting or inadvertent
handling of calbes, or malfunction due to bad cable contacts.
 Do not install the control lines together with the communication cables, or bring them close to each other.
Failure to do so may cause malfunctions due to noise.
 Do not grab on the cable when removing the communication cable or power cable connected to the module.
When removing the cable, loose the screws on the side that is connected to the module.
Pulling the cable that is still connected to the module may cause a damage to the module or cable, or
malfunction due to bad contacts.
[STARTING AND MAINTENANCE PRECAUTIONS]
CAUTION
 Do not touch the terminals while the power is on.
Doing so may cause malfunction.
 Make sure to switch all phases of the external power supply off before cleaning or re-tightening screws.
If you do not switch off the external power supply, it will cause failure or malfunction of the module.
If the screws are loose, it may result in fallout, short circuit or malfunction.
Tightening the screws too far may cause damages to the screws and/or the module, resulting in fallout,
short circuit or malfunction.
 Do not disassemble or modify the module.
Doing so could cause failure, malfunction injury or fire.
 Do not drop or give a strong shock to the module because its case is made of resin.
Doing so may cause a damage to the module.
 Make sure to switch all phases of the external power supply off before mounting or removing the module.
If you do not switch off the external power supply, it will cause failure or malfunction of the module.
 Mounting/removing the terminal block is limited to 50 times after using a product. (IEC61131-2-compliant)
 Before handling the module, always touch grounded metal, etc. to discharge static electricity from the
human body.
Failure to do so can cause the module to fail or malfunction.
[DISPOSAL PRECAUTION]
CAUTION
 When disposing of this product, treat it as an industrial waste.

Revisions
* The manual number is noted at the lower left of the back cover.
Print Date *Manual Number Revision
Apr., 1998 SH(NA)-3304-A First printing
Jul., 2005 SH(NA)-3304-B Addition
Conformation to the EMC Directive and Low Voltage Instruction, WARRANTY
Correction
SAFETY PRECAUTIONS, Section 2.2, 5
Dec., 2006 SH(NA)-3304-C Correction
SAFETY PRECAUTIONS, Section 2.1, 3.9.4, 4.3, Chapter 5
Japanese Manual Version SH-3651-E
This manual does not imply guarantee or implementation right for industrial ownership or implementation
of other rights. Mitsubishi Electric Corporation is not responsible for industrial ownership problems caused
by use of the contents of this manual.
©1998 Mitsubishi Electric Corporation

Introduction
Thank you for purchasing the Mitsubishi Graphic Operation Terminal.
Before using the equipment, please read this manual carefully to develop full familiarity with the functions and
performance of the graphic operation terminal you have purchased, so as to ensure correct use.
Please forward a copy of this manual to the end user.
Table of Contents
1. OVERVIEW 1-1
1.1 Features............................................................................................................................................................ 1- 1
2. SYSTEM CONFIGURATION 2-1 to 2-2
2.1 Overall Configuration ........................................................................................................................................ 2- 1
2.2 Applicable CPUs ............................................................................................................................................... 2- 2
3. SPECIFICATIONS 3-1 to 3-24
3.1 General Specification........................................................................................................................................ 3- 1
3.2 Performance Specifications .............................................................................................................................. 3- 2
3.3 Temperature/Digital Conversion Characteristics............................................................................................... 3- 4
3.4 Maximum Transmission Distance over the CC-Link System ............................................................................ 3- 4
3.5 Data Link Processing Time. .............................................................................................................................. 3- 5
3.6 Twisted Cable Specifications ............................................................................................................................ 3- 6
3.7 Function List...................................................................................................................................................... 3- 7
3.8 I/O Signals in Respect to the Master Module.................................................................................................... 3- 8
3.8.1 I/O signal list .......................................................................................................................................... 3- 8
3.8.2 I/O signal functions ................................................................................................................................ 3-11
3.8.3 Wire breakage detection........................................................................................................................ 3-16
3.8.4 Conversion enable/disable designation ................................................................................................. 3-17
3.8.5 Sampling processing/travel average processing designation................................................................ 3-18
3.8.6 Thermocouple type selection................................................................................................................. 3-20
3.8.7 Pt100 cold junction compensation enable/disable designation ............................................................. 3-21
3.9 Remote Register ............................................................................................................................................... 3-22
3.9.1 Remote register assignment.................................................................................................................. 3-22
3.9.2 High and low limit settings ..................................................................................................................... 3-23
3.9.3 Detected temperature value .................................................................................................................. 3-24
3.9.4 Scaling value ......................................................................................................................................... 3-24
4. SETTING AND PROCEDURE BEFORE OPERATION 4-1 to 4-10
4.1 Procedure before Operation ............................................................................................................................. 4- 1
4.2 Handling Precautions........................................................................................................................................ 4- 2
4.3 Part Identification and Setting ........................................................................................................................... 4- 3
4.4 Error Compensation by the Offset Value/Gain Value Setting ........................................................................... 4- 5
4.4.1 Initial settings for error compensation.................................................................................................... 4- 6
4.4.2 Error compensation procedure .............................................................................................................. 4- 7
4.5 Station Number Setting..................................................................................................................................... 4- 8
4.6 Orientation of Module Installation ..................................................................................................................... 4- 8
4.7 Wiring................................................................................................................................................................ 4- 9
4.7.1 Handling precautions for twisted cables ................................................................................................ 4- 9
4.7.2 Wiring example with CC-Link modules .................................................................................................. 4- 9
4.7.3 Precautions when wiring to a thermocouple .......................................................................................... 4-10

4.7.4 Wiring example with thermocouple........................................................................................................ 4-10
5. PROGRAMMING 5-1 to 5-18
5.1 Programming Procedure................................................................................................................................... 5- 1
5.2 Programming Example of Reading Initial Setting and Detected Temperature Value ....................................... 5- 2
5.3 Program Eamples when QCPU(Q Mode) Is Used ............................................................................................ 5- 5
5.4 Program Eamples when QCPU Is Used ........................................................................................................... 5-10
5.5 Program Eamples when ACPU/QCPU(A Mode) Is Used (Dedicated Instructions)........................................... 5-13
5.6 Program Eamples when ACPU/QCPU(A Mode) Is Used (FROM/TO Instructions)........................................... 5-16
6. TROUBLESHOOTING 6-1 to 6-5
6.1 Cause of Errors and Corrective Actions by LED Indication............................................................................... 6- 1
6.2 When Wire Breakage Detection Flag is On...................................................................................................... 6- 3
6.3 When E2PROM Error Flag is On....................................................................................................................... 6- 3
6.4 When Detected Temperature Value cannot be Read ....................................................................................... 6- 3
6.5 When Detected Temperature Value is Abnormal ............................................................................................. 6- 3
6.6 When There is a Communication Error between Master Station and AJ65BT-68TD ....................................... 6- 4
APPENDIX A-1 to A-28
Appendix 1 Usual Operation Limits and Superheated Operating Limits .................................................................. A- 1
Appendix 2 Allowable Temperature Differences ...................................................................................................... A- 1
Appendix 3 Thermal Electromotive Force Chart ...................................................................................................... A- 2
Appendix 3.1 Standard Thermal Electromotive Force of B ............................................................................. A- 2
Appendix 3.2 Standard Thermal Electromotive Force of R............................................................................. A- 6
Appendix 3.3 Standard Thermal Electromotive Force of S ............................................................................. A-10
Appendix 3.4 Standard Thermal Electromotive Force of K ............................................................................. A-14
Appendix 3.5 Standard Thermal Electromotive Force of E ............................................................................. A-18
Appendix 3.6 Standard Thermal Electromotive Force of J.............................................................................. A-21
Appendix 3.7 Standard Thermal Electromotive Force of T ............................................................................. A-25
Appendix 4 External Dimensions Diagram............................................................................................................... A-27

About This Manual
The following are manuals related to this product.
Request for the manuals as needed according to the chart below.
Related Manuals
Manual Name Manual No.
(Type code)
Type AJ61BT11/A1SJ61BT11 CC-Link System Master/Local Module User's Manual
This manual explains about the system configuration, performance specifications, functions,
handling, wiring and troubleshooting of AJ61BT11and A1SJ61BT11. (Sold separately)
IB-66721
(13J872)
Type AJ61QBT11/A1SJ61QBT11 CC-Link System Master/Local Module User's Manual
This manual explains about the system configuration, performance specifications, functions,
handling, wiring and troubleshooting of AJ61QBT11and A1SJ61QBT11. (Sold separately)
IB-66722
(13J901)
Type QJ61BT11N CC-Link System Master/Local Module User's Manual
Describes the system configuration, performance specifications, functions, handling, wiring and
troubleshooting of the QJ61BT11N. (Optionally available)
SH-080394E
(13JR64)
Conformation to the EMC Directive and Low Voltage Instruction
When complying with EMC Directives and Low-Voltage Directives by assembling a Mitsubishi PLC
compatible with EMC Directive and Low-Voltage Directives into the user product, refer to Chapter 3 "EMC
Directives and Low-Voltage Directives" in the User’s Manual (Hardware) for the CPU module being used.
The CE logo is printed on the rating plate on the main body of the PLC that conforms to the EMC directive
and low voltage instruction.
To conform this product to the EMC Directive and Low Voltage Directive, refer to the Section of "CC-Link
Modules" in Chapter 3 "EMC Directive and Low Voltage Directive" of the User's Manual (Hardware) of the
CPU module used.

About Generic Terms and Abbreviations
Unless otherwise specified, this manual uses the following generic terms and abbreviations to
explain the AJ65BT-68TD Thermocouple Input Module. Temperature input module.
Generic Term/
Abbreviation
Description
GX Developer Generic product name for product model names SWnD5C-GPPW, SWnD5C-GPPW-A,
SWnD5C-GPPW-V and SWnD5C-GPPW-VA. n in the model name indicates 4 or more.
ACPU Generic term for A0J2CPU, A0J2HCPU, A1CPU, A2CPU, A2CPU-S1, A3CPU, A1SCPU,
A1SCPUC24-R2, A1SHCPU, A1SJCPU, A1SJCPU-S3, A1SJHCPU, A1NCPU, A2NCPU,
A2NCPU-S1, A3NCPU, A3MCPU, A3HCPU, A2SCPU, A2SHCPU, A2ACPU, A2ACPU-S1,
A3ACPU, A2UCPU, A2UCPU-S1, A2USCPU, A2USCPU-S1, A2USHCPU-S1, A3UCPU and
A4UCPU.
QnACPU Generic term for Q2ACPU, Q2ACPU-S1, Q2ASCPU, Q2ASCPU-S1, Q2ASHCPU,
Q2ASHCPU-S1, Q3ACPU, Q4APU and Q4ARCPU.
QCPU (A mode) Generic term for Q02CPU-A, Q02HCPU-A and Q06HCPU-A.
QCPU (Q mode) Generic term for Q02CPU, Q02HCPU, Q06HCPU, Q12HCPU and Q25HCPU.
Master station Station that controls a data link system.
One station is required for one system.
Local station Station that has a PLC CPU and can communicate with the master station and other local
stations.
Remote I/O station Station that handles only bit unit information. (Input/output from/to external device)
(AJ65BTB1-16D, AJ65SBTB1-16D, etc.)
Remote device
station
Station that handles bit unit information and word unit information. (Input/output from/to
external device, analog data conversion)
Remote station Generic term for remote I/O station and remote device station. Controlled by the master
station.
Intelligent device
station
Station that can perform transient transmission, e.g. AJ65BT-R2. (Local station included)
Master module Generic term for QJ61BT11N, QJ61BT11, AJ61BT11, A1SJ61BT11, AJ61QBT11 and
A1SJ61QBT11 used as the master station.
SB Link special relay (for CC-Link)
Bit unit information that indicates the module operation status or data link status of the
master station/local station. Represented as SB for convenience.
SW Link special register (for CC-Link)
16-bit unit information that indicates the module operation status or data link status of the
master station/local station. Represented as SW for convenience.
RX Remote input (for CC-Link)
Information input from a remote station to the master station in bit unit. Represented as RX
for convenience.
RY Remote output (for CC-Link)
Information output from the master station to a remote station in bit unit. Represented as RY
for convenience.
RWw Remote register (write area for CC-Link)
Information output from the master station to a remote device station in 16-bit unit.
Represented as RWw for convenience.
RWr Remote register (read area for CC-Link)
Information input from a remote device station to the master station in 16-bit unit.
Represented as RWr for convenience.

Packing List
This product consists of the following items.
Product name Quantity
AJ65BT-68TD thermocouple input module 1
AJ65BT-68TD Thermocouple Temperarure Input Module User’s Manual (Hardware) 1

1. OVERVIEW MELSEC-A
1-1
1. OVERVIEW
This user's manual explains the specifications, handling, programming methods, etc. of the AJ65BT-
68TD Thermocouple Input Module (hereinafter referred to as AJ65BT-68TD) used as a remote device
station for the CC-Link system.
The AJ65BT-68TD is a module that converts the thermocouple input values from outside the PLC to
the temperature values or scaling values of 16-bit signed BIN data.
1.1 Features
The following are the features of the AJ65BT-68TD.
(1) Temperature – digital conversion is possible at eight channels in one module
One AJ65BT-68TD module may perform up to eight channels of temperature – digital
conversions.
(2) Thermocouples conforming the JIS standard may be used.
Seven types of thermocouples (K, E, J, T, B, R and S) that conform to the JIS standard may be
used.
Also, a thermocouple may be chosen independently for each channel
(3) Conversion enabling and disabling
Conversion may be enabled or disabled for each individual channel. By disabling the conversion
of channels that are not used, generation of unnecessary wire breakage detection flags may be
prevented and sampling time may be reduced.
(4) Wire breakage detection is possible
The thermocouple and compensating conductor breakage may be detected for each channel.
(5) Sampling processing and travel average processing may be designated
As a conversion processing method, sampling processing and travel average processing may
designated for each channel.
(6) Cold junction compensation is possible using Pt100 temperature-measuring resistor
Since a Pt100 temperature-measuring resistor is connected, cold junction compensation is
performed automatically.
(7) Pt100 cold junction compensation enable/disable setting is possible
By disabling the cold junction compensation by the Pt100 temperature-measuring resistor, cold
junction compensation may be performed at outside the module.
If the cold junction compensation accuracy ±1 °C of the Pt100 temperature-measuring resistor
may not be ignored as a tolerance, cold junction compensation accuracy may be increased by
installing a high-accuracy ice bus to outside of the module.
(8) Error compensation can be performed by setting the offset/gain value
Error compensation may be performed individually at each channel by setting the offset/gain
value.
Also, the offset/gain value may be selected to use a user setting value or factory setting value.

2. SYSTEM CONFIGURATION MELSEC-A
2-1
2. SYSTEM CONFIGURATION
System configuration when using the AJ65BT-68TD is explained below.
2.1 Overall Configuration
The overall configuration when using the AJ65BT-68TD is shown below.
4 stations occupied
RX/RY 128 points each
RWr/RWw 16 points each
Thermocouple
Temperature detection
target object
Master/local module for CC-Link (master station) Master/local module for CC-Link (local station)
Twisted cable with shield
(Intelligent device station) (Remote I/O station)
AJ65BT-68TD
(Remote device station)
(Remote device station)
The maximum overall distance for the system is as follows
(varies depending on transmission speed setting).
156 kbps : 1200 m (3937 ft.) 5 Mbps : 150 m (492.1 ft.)
625 kbps : 600 m (1968.5 ft.) 10 Mbps : 100 m (328.1 ft.)
2.5 Mbps : 200 m (656.2 ft.)

2. SYSTEM CONFIGURATION MELSEC-A
2-2
2.2 Applicable CPUs
(1) When the master module is AJ61BT11
• A0J2CPU • A0J2HCPU • A1CPU • A2CPU (S1) • A3CPU
• A1NCPU • A2NCPU (S1) • A3NCPU • A3MCPU • A3HCPU
• A2ACPU (S1) • A3ACPU • A2UCPU (S1) • A3UCPU • A4UCPU
• A73CPU
• A1SCPU (C24-R2) • A1SJCPU • A2SCPU • A2USCPU (S1)
• Q02CPU-A • Q02HCPU-A • Q06HCPU-A
(2) When the master module is AJ61QBT11
• Q2ACPU (S1) • Q3ACPU • Q4ACPU
• Q2ASCPU (S1) • Q2ASHCPU (S1)
(3) When the master module is A1SJ61BT11
• A1SCPU (C24-R2) • A1SHCPU • A1SJCPU • A1SJHCPU • A2SCPU
• A2SHCPU • A2USCPU (S1) • A2USH-S1
(4) When the master module is A1SJ61QBT11
• Q2ASCPU (S1) • Q2ASHCPU (S1)

3. SPECIFICATIONS MELSEC-A
3-1
3. SPECIFICATIONS
This section explains the AJ65BT-68TD the general specifications, performance specifications, and
transmission specifications.
3.1 General Specification
This section explains the AJ65BT-68TD general specifications.
Item Specifications
Ambient operating
temperature 0 to 55 °C
Ambient storage temperature -20 to 75 °C
Ambient operating humidity 10 to 90 %RH, Non-condensing
Ambient storage humidity 10 to 90 %RH, Non-condensing
Frequency Acceleration Amplitude No. of sweeps
10 to 57 Hz — 0.075 mm
(0.0030 in.)
Vibration resistance 57 to 150 Hz 9.8 m/s2{1 G} —
10 to 57 Hz — 0.035 mm
(0.0014 in.)
57 to 150 Hz 4.9 m/s2{0.5 G} —
Shock resistance Conforming to JIS B 3502, IEC 61131-2
(147 m/s2{15 G}, 3 times in each of 3 directions X Y Z)
Operating ambience No corrosive gases
Operating elevation 2000 m (6562 ft.) max.
Installation location Control panel
Over voltage category *1 II max.
Pollution level *2 2 max.
*1 : This indicates the section of the power supply to which the equipment is assumed to be
connected between the public electrical power distribution network and the machinery within the
premises. Category II applies to equipment for which electrical power is supplied from fixed
facilities. The surge voltage withstand level for up to the rated voltage of 300 V is 2500 V.
*2 : This index indicates the degree to which conductive material is generated in terms of the
environment in which the equipment is used. Pollution level 2 is when only non-conductive
pollution occurs. A temporary conductivity caused by condensation must be expected
occasionally.
10 times each in
X, Y, Z directions
(for 80 min.)
Conforming to
JIS B 3502,
IEC 61131-2
Under intermittent
vibration
Under continuous
vibration

3. SPECIFICATIONS MELSEC-A
3-2
3.2 Performance Specifications
The performance specifications of the AJ65BT-68TD are shown below.
Item Specifications
Temperature Sensor Input (°C) -200 to 1700
Output
Detected
temperature
Scaling value 16-bit signed binary (0 to 2000)
Applicable thermocouples
and temperature
measurement range accuracy
Cold junction compensation
accuracy (°C)
Overall accuracy Depends on *1 calculation expression
Maximum resolution B, R, S : 0.3 °C K, E, J, T : 0.1 °C
Conversion speed
(sampling time) [ms/ch]
Absolute maximum input [V] ± 5
Number of analog input
points 8 channels + Pt100 connection channel
Thermocouple input to CC-Link transmission : Transformer insulation
Between channels : Transformer insulation
16-bit signed binary (-2000 to 17000 : value to one decimal place multiplied by 10)
± 1.0
45 ms/channel *2
Insulation method
Applicable
thermocouple
type
Temperature
measuremen
t range [°C ]
Conversion accuracy
(When ambient operating
temperature is 25 ±5 °C)
Temperature characteristic
(Per 1 °C of ambient operating
temperature change)
B 600 to 1700 ± 2.5 °C ± 0.4 °C
0 to 200 ± 0.4 °C
200 to 1600 ± 0.3 °C
0 to 200 ± 0.4 °C
200 to 1600 ± 0.3 °C
±0.06 °C or ±0.3 % of the measured
temperature, whichever is greater
±0.06 °C or ±0.02 % of the measured
temperature, whichever is greater
±0.06 °C or ±0.3 % of the measured
temperature, whichever is greater
±0.06 °C or ±0.02 % of the measured
temperature, whichever is greater
±0.06 °C or ±0.02 % of the measured
temperature, whichever is greater
±0.06 °C or ±0.3 % of the measured
temperature, whichever is greater
±0.06 °C or ±0.02 % of the measured
temperature, whichever is greater
±0.5 °C or ±0.25 % of the
measured temperature,
whichever is greater
± 2.0 °C
± 2.0 °C
0 to 350
-200 to 0
0 to 750
0 to 800
-200 to 0
-200 to 0
0 to 1200
S
T
J
E
K
R

3. SPECIFICATIONS MELSEC-A
3-3
Item Specifications
CC-Link station type Remote device station
Number of occupied stations 4 Stations : RX/RY 128 points each RWw/RWr 16 points each
Transmission
speed/maximum
transmission distance
Refer to Section 3.4
Maximum number of
connected modules
Connection cable CC-Link dedicated cable
Depends on noise simulator of noise voltage at 500 Vp-p, noise width at 1 ms and noise
frequency at 25 to 60 Hz
Dielectric withstand voltage 500 V AC between DC external terminal batch and ground for 1 minute
10 MΩor more using insulation resistance meter when 500 V DC between DC external
terminal batch and ground
Connected terminal block 27-point terminal blocks (M3.5 × 7 screws)
Applicable wire size [mm2] 0.75 to 2.00
Applicable solderless terminal RAV 1.25-3.5, RAV 2-3.5 (conforms to JIS C 2805)
Allowable momentary power
failure period [ms]
Screws M4 × 0.7 mm × 16 mm or larger (tightening torque range 78 to 118 N · cm {8 to 12 kg · cm})
May be attached using DIN rails
Applicable DIN rail TH35-7.5Fe, TH35-7.5AI, TH35-15Fe (conforms to JIS C 2812 )
External power supply 24V DC (18 to 30V DC)
Internal consumption current [A] 0.081
Mass [kg (lb)] 0.40 (0.88)
*1 Overall accuracy computation method is as follows:
(Overall accuracy) = (Conversion accuracy) + (Temperature characteristics) × (Ambient operating
temperature change) + (Cold junction compensation accuracy)
The ambient operating temperature change refers to the value that falls outside the range of 25 ±5 °C.
Example) The overall accuracy when using thermocouple K, measured temperature 150 °C,
ambient operating temperature 35 °C will be:
(±0.5 °C) + (±0.06 °C) × (5 °C) + (±1 °C) = ±1.8 °C
*2 Conversion speed is the time required to convert the input temperature to the corresponding digital
value and store it into the remote register.
When using multiple channels, the conversion speed becomes "45ms × number of channels that
are conversion enabled".
16 modules
1
Noise durability
Insulation resistor
Module installation screw

3. SPECIFICATIONS MELSEC-A
3-4
3.3 Temperature/Digital Conversion Characteristics
Since the thermal electromotive force has a non-linear characteristic, it must undergo the linearize
processing before being written in the remote register.
An example of detected temperature characteristic in respect to the thermocouple input value is shown
below.
(1200 °C) 12000
48828 [ µV ]
(1200 °C)
0
0
(0 °C)
(
0 °C
)
V
The diagram at left is an example
of temperature conversion
characteristic example under
the conditions shown below:
Thermocouple used : JIS K type
Terminal block temperature : 0 [°C]
Temperature
conversionvalue
Thermal
electromotive force
Thermocouple
output characteristic
3.4 Maximum Transmission Distance over the CC-Link System
The maximum transmission distance over the CC-Link system is shown below.
1) Regardless of the setting of the transmission speed, the cable length must be "greater than 2 m
(6.6 ft.)" long between a mater or local station, intelligent device station and the adjacent stations.
2) For 5 Mbps and 10 Mbps transmission speeds, the maximum transmission distance will differ
according to the cable length between the remote I/O station and remote device station, so
exercise caution.
Master
station
Remote I/O station
Remote device station
Remote I/O station
Remote device station
Remote I/O station
Remote device station
Remote I/O station
Remote device station
Local station
Standby master
station
Intelligent device
station
Local station
Standby master
station
Intelligent device
station
1) 1)2) 2)1)
Maximum transmission distance
Maximum transmission
distance
156 kbps 30 cm (11.8 in.) or more 1200 m (3937 ft.)
625 kpbs 30 cm (11.8 in.) or more 600 m (1968.5 ft.)
2.5 Mpbs 30 cm (11.8 in.) or more 200 m (656.2 ft.)
60 cm (23.6 in.) or more 150 m (492.1 ft.)
30 to 59 cm (11.8 to 23.2 in.) 110 m (360.9 ft.)
1 m (3.3 ft.) or more 100 m (328.1 ft.)
10 Mbps 60 to 99 cm (23.6 to 39 in.) 80 m (262.5 ft.)
30 to 59 cm (11.8 to 23.2 in.) 50 m (164 ft.)
2)1)Transmission speed
2 m (6.6 ft.) or more5 Mbps

3. SPECIFICATIONS MELSEC-A
3-5
3.5 Data Link Processing Time
For the AJ65BT-68TD, the data link processing time shown below will be required in order to execute
each function.
For details on link scan time, refer to the AJ61BT11/A1SJ61BT11 CC-Link System Master/Local
Module User's Manual or the AJ61QBT11/A1SJ61QBT11 CC-Link System Master/Local Module
User's Manual.
(1) Mater station (RY) →Remote device station (RY) processing time
[Expression]
SM + LS × 3 + Remote device station processing time (90 ms) [ms]
AJ65BT-68TD
SM : Master station sequence program scan time
LS : Link scan time
(2) Master station (RWw) →Remote device station (RWw) processing time
[Expression]
SM + LS × 3 + Remote device station processing time (90 ms) [ms]
AJ65BT-68TD
SM : Master station sequence program scan time
LS : Link scan time
(3) Master station (RX) ←Remote Device Station (RX) Processing Time
[Expression]
SM + LS × 2 + Remote device station processing time (1 ms) [ms]
AJ65BT-68TD
SM : Master station sequence program scan time
LS : Link scan time
(4) Master station (RWr) ←Remote Device Station (RWr) Processing Time
[Expression]
SM + LS × 2 + Remote device station processing time (1 ms) [ms]
AJ65BT-68TD
SM : Master station sequence program scan time
LS : Link scan time
POINT
The above are examples of processing time until the control of the output signal to the AJ65BT-
68TD from the PLC CPU or until input signals or remote registers are read.
The maximum time that takes for updating the detected temperature read by the PLC CPU is
"data link processing time + sampling time."

3. SPECIFICATIONS MELSEC-A
3-6
3.6 Twisted Cable Specifications
The twisted cable specifications and recommended cables for use with the CC-Link is explained
below.
Also, the performance of the CC-Link may not be guaranteed when using cables other than
recommended ones as shown below.
The recommended cable names and specifications are shown in the table below.
Item Specification
Type FANC–SB 0.5 mm2× 3
Contact Mitsubishi Electric System Service, Inc.
Kurashige Denkou, Inc.
Cable type Twisted shielded cable
Conductor cross-sectional area 0.5 mm2
Conductor resistance (20 °C) 37.8 Ω/km or less
Conductive resistance 10000 MΩkm or more
Dielectric withstand voltage 500 V DC one minute
Static capacity (1 kHz) 60 nF/km or less
Characteristic impedance (1 MHz) 100 ± 15 Ω
Cross-sectional diagram
blue
white yellow
DA
DB DG
Sheath
Shield
Aluminum tape
Ground wire
External dimensions 7 mm (0.28 in.)
Approximate mass 65 kg / km