Mitsubishi Electric Melsec QJ71NT11B User manual

MELSECNET/H
Network Module
User’s Manual
(Hardware)
QJ71NT11B
Thank you for purchasing the Mitsubishi programmable controller
MELSEC-Q Series.
Prior to use, please read both this manual and detailed manual
thoroughly and familiarize yourself with the product.
MODEL QJ71NT11B-U-HW
MODEL
CODE 13JY93
IB(NA)-0800440-A(0810)MEE
2008 MITSUBISHI ELECTRIC CORPORATION

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zSAFETY PRECAUTIONS z
(Always read these instructions before using this equipment.)
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.
Precautionary notes in this manual cover only the installations of this product.
For precautions on designing and discarding this product, refer to "Safety
Precautions" in the MELSECNET/H Reference Manual.
For the safety instructions of the programmable controller system, please read
the CPU module user's manual.
In this manual, the safety instructions are ranked as "DANGER" and "CAUTION".
Indicates that incorrect handling may cause hazardous
conditions, resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous
conditions, resulting in medium or slight personal injury or
physical damage.
Note that the CAUTION level may lead to a serious consequence according
to the circumstances.
Always follow the instructions of both levels because they are important to
personal safety.
Please save this manual to make it accessible when required and always forward
it to the end user.
DANGER
CAUTION

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[Installation Precautions]
CAUTION
zUse the programmable controller in the operating environment that meets
the general specifications given in the user’s manual of the CPU module.
Using this programmable controller in an environment outside the range of
the general specifications could result in electric shock, fire, erroneous
operation, and damage to or deterioration of the product.
zWhile pressing the installation lever located at the bottom of module, insert
the module fixing tab into the fixing hole in the base unit until it stops.
Then, securely mount the module with the fixing hole as a supporting point.
Incorrect loading of the module can cause a malfunction, failure or drop.
When using the programmable controller in the environment of much
vibration, tighten the module with a screw.
Tighten the screw in the specified torque range.
Undertightening can cause a drop, short circuit or malfunction.
Overtightening can cause a drop, short circuit or malfunction due to damage
to the screw or module.
zCompletely turn off the externally supplied power used in the system before
mounting or removing the module.
Not doing so could result in damage to the product.
zDo not directly touch the module's conductive parts or electronic
components.
Touching the conductive parts could cause an operation failure or give
damage to the module.
zCompletely turn off the externally supplied power used in the system when
installing or placing wiring. Failure to do so may cause malfunction or failure
of the module.

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[Wiring Precautions]
DANGER
zCompletely turn off the externally supplied power used in the system when
installing or placing wiring.
Failure to do so may cause electric shocks or damage the product.
CAUTION
zAlways connect the FG terminals to the ground using class D (class 3) or
higher grounding exclusively designed for programmable controller.
Failure to do so may cause malfunctions.
zWhen connecting cables to the terminal block for external power supply,
check the rated voltage and terminal layout of the product for correct wiring.
Connecting a power supply that is different from the rating or incorrectly
wiring the product could result in fire or damage.
zTighten the terminal screws with the specified torque.
If the terminal screws are loose, it could result in short circuits, fire, or
erroneous operation.
zSolder coaxial cable connectors properly. Incomplete soldering may result in
malfunctioning.
zBe sure there are no foreign substances such as sawdust or wiring debris
inside the module.
Such debris could cause fires, damage, or erroneous operation.
zThe module has an ingress prevention label on its top to prevent foreign
matter, such as wire offcuts, from entering the module during wiring.
Do not peel this label during wiring.
Before starting system operation, be sure to peel this label because of heat
dissipation.
zMake sure to place the communication and power cables into a duct or
fasten them using a clamp. Failure to do so may damage the module or
cables by pulling a dangling cable inadvertently or cause the module to
malfunction due to bad connection.
zWhen disconnecting the communication and power cables from the module,
do not pull a cable part by hand.
When disconnecting a cable with a connector, hold the connector connected
to the module by hand and pull it out to remove the cable. When
disconnecting a cable connected to a terminal block, loosen the screws on
the terminal block first before removing the cable. If a cable is pulled while
being connected to the module, it may cause the module to malfunction or
damage the module and cables.

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Revisions
* The manual number is noted at the lower right of the top cover.
Print Date *Manual Number Revision
Oct., 2008 IB(NA)-0800440-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.
2008 MITSUBISHI ELECTRIC CORPORATION

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CONTENTS
1. OVERVIEW ................................................................................................... 1
2. PERFORMANCE SPECIFICATIONS ............................................................ 2
3. HANDLING .................................................................................................... 3
3.1 Handling Precautions ............................................................................... 4
4. PART NAME.................................................................................................. 5
5. WIRING ......................................................................................................... 7
5.1 Twisted Bus System (When using twisted pair cable) .............................. 8
5.1.1 Specifications of twisted pair cable .................................................... 8
5.1.2 Precautions for wiring twisted pair cable............................................ 9
5.2 Twisted Bus System (When using Version 1.10 compatible CC-Link
dedicated cable)..................................................................................... 10
5.2.1 Specifications of Version 1.10 compatible CC-Link dedicated
cable ............................................................................................... 10
5.2.2 Precautions for wiring Version 1.10 compatible CC-Link dedicated
cable ............................................................................................... 11
5.3 Connecting Twisted Pair Cable, and Bar Terminal for Version 1.10
Compatible CC-Link Dedicated Cable.................................................... 12
6. EXTERNAL DIMENSIONS .......................................................................... 14

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About Manuals
The following manuals are also related to this product.
Use this table to order necessary manuals to the functions used.
Related Manuals
Manual name Manual No.
(Model code)
Q corresponding MELSECNET/H Network System
Reference Manual (PLC to PLC network)
SH-080049
(13JF92)
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
No additional measures are necessary for the compliance of this product
with the EMC and Low Voltage Directives.

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1. OVERVIEW
This manual explains how to handle the MELSECNET/H network module, model
number QJ71NT11B (hereinafter referred to as the network module).
The network module is used as a control/normal station in the PLC to PLC
network in the MELSECNET/H system.
After unpacking the network module, confirm that the following products are
enclosed.
Model name Part name Quantity
Model QJ71NT11B MELSECNET/H network module
(Twisted bus type) 1
QJ71NT11B
Terminal resistor 110 , 1/2W(brown, brown, brown) 1

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2. PERFORMANCE SPECIFICATIONS
The following table shows the performance specifications for the network
module:
Specifications
Item QJ71NT11B
MELSECNET/H mode, MELSECNET/H Extended mode*1
LX/LY 8192 points
LB 16384 points
LW 16384 points
Maximum number of link
points per network
Maximum
number of
link points
per station
PLC to PLC
network
• MELSECNET/H mode
{(LY+ LB) /8 + (2 × LW)} 2000 bytes *2
• MELSECNET/H Extended mode
{(LY+ LB) /8 + (2 × LW)} 35840 bytes *2
Communication speed 156kbps/312kbps/625kbps/1.25Mbps/2.5Mbps/5Mbps/10Mbps
(Switched by network parameters)
Communication method Token bus
Synchronous method Frame synchronous
Transmission path format Bus (RS-485)
Maximum number of
networks 239
Maximum number of
groups 32
Number of
stations per
network
PLC to PLC
network 32 stations (Control station: 1, Normal station: 31)
Communication speed Twisted pair
cable
Version 1.10
compatible CC-Link
dedicated cable
156kbps *3 1200m 1200m
312kbps 600m 900m
625kbps 400m 600m
1.25Mbps 200m 400m
2.5Mbps 200m
5Mbps 150m
10Mbps
-
(Not applicable) 100m
Overall distance for one
network
Connection cable Twisted pair cable (optional), Version 1.10 compatible CC-Link
dedicated cable (optional)*4
Number of I/O occupied
points 32 points (I/O assignment: intelligent 32 points)
Internal current
consumption (5VDC) 0.6A
External dimensions 98 (3.86) (H) 27.4 (1.08) (W) 90 (3.54) (D) [mm (inch)]
Weight 0.13kg
*1: Mode selection is performed using network parameters.
*2: The number of LY points of the stations set in the I/O master station is the sum total of the
LY points for output to all stations within the block.
*3: This value is set as default of the communication speed.
*4: For details of cable specifications, refer to Section 5.1 or Section 5.2 in this manual.
For general specifications of the network module, refer to the user's manual for the CPU used.

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3. HANDLING
CAUTION
zUse the programmable controller in the operating environment that meets
the general specifications given in the user’s manual of the CPU module.
Using this programmable controller in an environment outside the range of
the general specifications could result in electric shock, fire, erroneous
operation, and damage to or deterioration of the product.
zWhile pressing the installation lever located at the bottom of module, insert
the module fixing tab into the fixing hole in the base unit until it stops.
Then, securely mount the module with the fixing hole as a supporting point.
Incorrect loading of the module can cause a malfunction, failure or drop.
When using the programmable controller in the environment of much
vibration, tighten the module with a screw.
Tighten the screw in the specified torque range.
Undertightening can cause a drop, short circuit or malfunction.
Overtightening of screws can cause damages to the screws and/or the
module, resulting in fallout, short circuits, or malfunction.
zCompletely turn off the externally supplied power used in the system before
mounting or removing the module. Failure to do so may damage the product.
zDo not directly touch the conducting parts and electronic parts of the module.
This may cause the module to malfunction or fail.