Mitsubishi Q68RD3-G User manual

User’s Manual
(Hardware)
Q68RD3-G
Thank you for purchasing the Mitsubishi programmable controller
MELSEC-Q series.
© 2008 MITSUBISHI ELECTRIC CORPORATION
Channel Isolated
RTD Input Module
Prior to use, please read this and relevant manuals thorougly to fully
understand the product.
MODEL Q68RD3-G-U-HW
MODEL
CODE 13JY54
IB(NA)-0800405-A(0802)MEE

A-1
SAFETY PRECAUTIONS
(Read these precautions before use.)
Before using this product, please read this manual and the relevant manuals
introduced in this manual carefully and pay full attention to safety to handle the
product correctly.
The instructions given in this manual are concerned with this product. For the
safety instructions of the programmable controller system, please read the User's
Manual for the CPU module.
In this section, the safety precautions are ranked as "DANGER" and "CAUTION".
Note that the CAUTION level may lead to a serious consequence according
to the circumstances.
Always follow the precautions of both levels because they are important to
personal safety.
Please keep this manual accessible when required and always forward it to the
end user.
DANGER
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

A-2
[DESIGN PRECAUTIONS]
[INSTALLATION PRECAUTIONS]
DANGER
Do not write data into the "system area" of the buffer memory of intelligent
function modules. Also, do not use any "prohibited to use" signals as an
output signal to an intelligent function module from the programmable
controller CPU.
Writing data into the "system area" or outputting a signal for "prohibited to
use" may cause a programmable controller system malfunction.
CAUTION
Do not bunch the control wires or communication cables with the main circuit
or power wires, or install them close to each other.
They should be installed 100 mm (3.94 inch) or more from each other.
Not doing so could result in noise that may cause malfunction.
CAUTION
Use the programmable controller in the environment conditions given in the
general specifications in the User's Manual for the CPU module. Failure to do
so may cause an electric shock, fire, malfunction, or damage to or
deterioration of the product.
While pressing the installation lever located at the bottom of the module,
insert the module fixing projection into the fixing hole in the base unit, and
mount the module with using the hole as a supporting point. Incorrect module
mounting may cause a malfunction, failure, or drop of the module. After
mounting the module to the base unit securely hold the module with module
fixing bracket.
The screws must be tightened within the specified torque range. If the screw
is too loose, it may cause a drop or malfunction. Excessive tightening may
damage the screw and/or the module, resulting in a drop or malfunction.
Be sure to shut off all phases of the external power supply used by the
system before mounting or removing the module. Failure to do so may cause
damage to the product.
Do not directly touch any conductive part or electronic part of the module.
Doing so may cause a malfunction or failure of the module.

A-3
[WIRING PRECAUTIONS]
CAUTION
Always ground the shielded cables for the programmable controller.
There is a risk of electric shock or malfunction.
For wiring and connection, properly press, crimp or solder the connector with
the tools specified by the manufactures and attach the connector to the
module securely.
Be careful to prevent foreign matter such as dust or wire chips from entering
the module.
Failure to do so may cause a fire, failure or malfunction.
A protective film is attached to the module top to prevent foreign matter such
as wire chips from entering the module during wiring.
Do not remove the film during wiring.
Be sure to remove it for heat dissipation before system operation.
Be sure to place the cables connected to the module in a duct or clamp them.
If not, dangling cables may swing or inadvertently be pulled, resulting in
damage to the module and/or cables, or malfunctions due to poor cable
connection.
When disconnecting the external wiring cable connected to the module, do
not pull it by holding the cable part. Disconnect the cable with connector with
holding the connector plugged into the module. Pulling the cable part with the
cable still connected to the module may cause a malfunction or damage to
the module and/or cable.
Do not place a module near the equipment that generates magnetic noise.

A-4
Revisions
* The manual number is given on the bottom right of the cover.
© 2008 MITSUBISHI ELECTRIC CORPORATION
Print Date *Manual Number Revision
Feb., 2008 IB(NA)-0800405-A First edition
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-5
CONTENTS
1. OVERVIEW .................................................................................................... 1
2. PERFORMANCE SPECIFICATIONS............................................................. 2
3. IMPLEMENTATION AND INSTALLATION..................................................... 5
3.1 Handling Precautions ............................................................................... 5
3.1.1 Mounting module fixing bracket ........................................................ 6
3.2 Installation Environment ........................................................................... 6
4. PART NAMES ................................................................................................ 7
5. WIRING .......................................................................................................... 9
5.1 Wiring Precautions ................................................................................... 9
5.2 External Wiring ....................................................................................... 10
5.3 Intelligent Function Module Switch Settings........................................... 11
6. EXTERNAL DIMENSIONS ........................................................................... 12

A-6
Manual
The following manual is also related to this product.
Order it if necessary.
Compliance with the EMC and Low Voltage Directives
(1) For programmable controller system
To configure a system meeting the requirements of the EMC and
Low Voltage Directives when incorporating the Mitsubishi
programmable controller (EMC and Low Voltage Directives
compliant) into other machinery or equipment, refer to Chapter 9
"EMC AND LOW VOLTAGE DIRECTIVES" of the QCPU User's
Manual (Hardware Design, Maintenance and Inspection).
The CE mark, indicating compliance with the EMC and Low Voltage
Directives, is printed on the rating plate of the programmable
controller.
(2) For the product
For the compliance of this product with the EMC and Low Voltage
Directives, refer to Section 5.1 "Wiring Precautions".
Related manual
Manual name Manual No.
(Model code)
Channel Isolated RTD Input Module Q68RD3-G/GX Configurator-TI
(SW1D5C-QTIU)
SH-080722ENG
(13JZ06)

1
1. OVERVIEW
This manual describes the specifications and part names of type
Q68RD3-G channel isolated RTD input module (hereinafter abbreviated
as Q68RD3-G) that is used with the MELSEC-Q series CPU module.
First, open the package of the Q68RD3-G and check that the following
is included.
Table 1.1 Packing List
Model Product name Quantity
Q68RD3-G Q68RD3-G Channel isolated RTD input module 1

2
2. PERFORMANCE SPECIFICATIONS
The following table shows the performance specifications of the
Q68RD3-G.
(1) List of Performance Specifications
Table 2.1 List of performance specifications
Item Specifications
Number of channels 8 channels
Output
Temperature
conversion value 16-bit signed binary (-2000 to 8500)
Scaling value 16-bit signed binary
Usable RTD Pt100 (JIS C 1604-1997, IEC 751 1983),
JPt100 (JIS C 1604-1981), Ni100(DIN 43760 1987)
Measured
temperature
range
Pt100 -200 to 850
JPt100 -180 to 600
Ni100 -60 to 180
Temperature detecting output
current 1.0mA or less
Degree of
conversion
accuracy *2
Pt100
-200 to
850 *1
0.8 (Ambient Temperature: 25 5 )
2.4 (Ambient Temperature: 0 to 55 )
-20 to
120 *1
0.3 (Ambient Temperature: 25 5 )
1.1 (Ambient Temperature: 0 to 55 )
0 to 200
*1
0.4 (Ambient Temperature: 25 5 )
1.2 (Ambient Temperature: 0 to 55 )
JPt100
-180 to
600 *1
0.8 (Ambient Temperature: 25 5 )
2.4 (Ambient Temperature: 0 to 55 )
-20 to
120 *1
0.3 (Ambient Temperature: 25 5 )
1.1 (Ambient Temperature: 0 to 55 )
0 to 200
*1
0.4 (Ambient Temperature: 25 5 )
1.2 (Ambient Temperature: 0 to 55 )
Ni100 -60 to
180 *1
0.4 (Ambient Temperature: 25 5 )
1.2 (Ambient Temperature: 0 to 55 )
Resolution 0.1
Conversion speed 320ms/8 channels *3
Number of analog input points 8 channels
Isolation specifications
Specific
isolated area
Isolation
method
Dielectric
withstand
voltage
Isolation
resistance
Between RTD
input and
programmable
controller
power supply
Transformer
isolation
500VACrms
for 1min. 500VDC
10M
or more
Between RTD
input channels
Transformer
isolation
1000VACrms
for 1min.

3
*1 If the resistance thermometer detectors detect the value out of measuring
range listed in the table, it corresponds to the maximum at more than 850
or the minimum at less than -200 .
*2 The sum between the degree of conversion accuracy for Q68RD3-G and that
of the tolerances for the resistance thermometer detectors is the degree of
accuracy for connecting the resistance thermometer detectors.
The calculational procedure for degree of accuracy is as follows.
(Degree of accuracy)=(Degree of conversion accuracy)+(Degree of
tolerance of resistance thermometer detector)
Item Specifications
Wire break detection Capable (channels respectively) *4
Maximum number of writes for
Flash memory 50,000
Number of I/O points occupied 16 points (I/O assignment:Intelligent 16 points)
External wiring connection system 40-pin connector
Applicable wire size 0.3mm2(AWG#22) or less
External device connection
connector (option) A6CON4
Internal current consumption
(5 VDC) 0.54A
Weight 0.20kg
Outline dimensions 102(H) 27.4(W) 130(D)mm
Table 2.2 Pt100 Tolerances (JIS C 1604-1997)
Class Tolerance
A (0.15+0.002 t )
B (0.3+0.005t)
Table 2.3 JPt100 Tolerances (JIS C 1604-1981)
Class Tolerance
0.15 (0.15+0.0015 t )
0.2 (0.15+0.002 t )
0.5 (0.3+0.005 t )
Table 2.4 Ni100 Tolerances (DIN 43760)
Class Tolerance
0 to 250 (0.4+0.007 t )
-60 to 0 (0.4+0.0028 t )