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.

1
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

2
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.

3
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.

4
3.1 Handling Precautions
(1) Since the module case is made of resin, do not drop it or subject it to strong
impact.
(2) Do not remove the printed-circuit board of the module from the case.
Doing so will cause failure.
(3) Be sure there are no foreign substances such as sawdust or wiring debris
inside the module.
Such debris could cause fires, damage, or erroneous operation.
(4) The 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.
(5) Before handling the module, touch a grounded metal object to discharge
the static electricity from the human body.
Not doing so may cause a failure or malfunction of the module.
(6) Tighten the screws such as module fixing screws within the following
ranges.
Screw location Tightening torque range
Module fixing screw (M3 screw)*1 0.36 to 0.48 Nym
Spring clamp terminal block fixing
screw (M4 screw) 0.78 to 1.18 Nym
*1: The module can be easily fixed onto the base unit using the hook at the top of
the module.
However, it is recommended to secure the module with the module fixing
screw if the module is subject to significant vibration.

5
4. PART NAME
(1) Indicator LED
LED Indication
RUN On : Module operating normally
Off : Watchdog timer error
(hardware error)
T. PASS On : Executing baton pass
Flash : Testing
Off : Baton pass not yet executed
(host is disconnecting)
SD On : Sending data
Off : Not sending data
ERR. On : Setting error
Flash :
• Error detected by a test
• Station number/Mode setting
switch(s) is changed during operation
Off : No setting error
MNG On : Operating as a control station,
sub-control station
Off : Operating as a normal station
D. LINK On : In data link
Off : Not in data link
RD On : Receiving data
Off : Not receiving data
<QJ71NT11B>
(1)
(2)
(3)
L ERR. On : Communication error
Off : No communication error
(2) Station number/Mode setting switches
Used to set the station number and mode of the network module. (Factory
default setting: 1)
Setting range
10 1 Indication
0 0 Setting error
(The ERR. LED turns on.)
0 1
to
3 2
Station number 1 to 32 (online.)
3 3 to 9
y0 to 9
TEST 0 to 6
Setting error
(The ERR. LED turns on.) *1
TEST 7 Self-loopback test
TEST 8 Internal self-loopback test
10 10s unit
1 1s unit
TEST 9 Hardware test
*1: Station number 33 to 64 will result in a setting error.
However, the ERR. LED will not turn on.

6
(3) Spring clamp terminal block
Used to connect a twisted pair cable or Version 1.10 compatible CC-Link
dedicated cable. (Refer to Section 5.1.2 (2)(b))

7
5. WIRING
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.

8
5.1 Twisted Bus System (When using twisted pair cable)
5.1.1 Specifications of twisted pair cable
The following shows the specifications of a shielded twisted pair cable used in
the twisted bus system.
Twisted pair cables that satisfy the following specifications can also be used
even not introduced.
Item KNPEV-SB 0.5SQ 1P*1
Cross section
Cable Shielded twisted pair cable
Core 2-core
Conductor
resistance (20 ) 39.4 /km or less
Insulation resistance
(20 ) 10M km or more
Dielectric withstand
voltage V-min 1000VAC 1 minute
Capacitance (1KHz) 70nF/km or less on average
Characteristic
impedance
(100KHz)
110 10
*1: Applicable only when the communication speed is 1.25Mbps or less.

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5.1.2 Precautions for wiring twisted pair cable
(1) Wiring precautions
(a) Wiring shielded twisted pair cable
When wiring a shielded twisted pair cable, ensure to prevent the noise
and surge induction, referring to the following.
1) Do not install a shielded twisted pair cable together with the main
circuit, high-voltage cable, or load line and also do not bring them
close to each other. (Keep a distance of 100mm (3.94 inches) or
more between them.)
2) Provide as much distance as possible between the shielded twisted
pair cables and the power supply of the module or I/O signal cables.
3) Do not use any of shielded twisted pair cables (e.g. One pair among
three pairs) for supplying power.
(b) Connecting terminating resistors
For the network modules at both ends, connect the DA and DB by a
terminating resister (110 , 1/2W) provided with the module.
(c) Connecting/disconnecting a shielded twisted pair cable
Shut off all phases of the external power supply for the system.
(2) Connection of cable
(a) Connection method
For connection between DAs and between DBs, use twisted pair cables.
No cabling is required for (DG).
In addition, connect terminating resistors for stations at both ends.
DA
DB
(DG)
FG
Terminating
resistor
(110 1/2W)
Terminating
resistor
(110 1/2W)
Shielded twisted pair cable
SLD
DA
DB
(DG)
FG
SLD
DA
DB
(DG)
FG
SLD
DA
DB
FG
SLD
(DG)

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(b) Connecting a cable to the spring clamp terminal block
The following explains connecting method of a cable to a spring clamp
terminal block.
For the stripping method of the cable end, refer to Section 5.3. in this
manual.
Use a recommended screwdriver or equivalent for connecting or
disconnecting cables.
For details of the driver, refer to Appendix.5 in the Q corresponding
MELSECNET/H Network System Reference Manual (PLC to PLC
network).
1) Connecting the cable
Fully insert the cable into the correct opening with the open/close
button pressed by a slotted screwdriver.
When using a bar terminal, the cable can be inserted without
pressing the button.
Insertion hole
Open/close button
2) Disconnecting the cable
Keep pressing the open/close button by a slotted screwdriver until
the cable is completely pulled out.
5.2 Twisted Bus System (When using Version 1.10 compatible CC-Link
dedicated cable)
5.2.1 Specifications of Version 1.10 compatible CC-Link dedicated cable
The following table shows the specifications of the Version 1.10 compatible
CC-Link dedicated cable used for the twisted bus system.
The following Version 1.10 compatible CC-Link dedicated cable can be used.
Product name Model Manufacturer
FANC-110SBH Mitsubishi Electric System & Service Co.,
Ltd.
Version 1.10 compatible
CC-Link dedicated cable FA-CBL200PSBH Mitsubishi Electric Engineering Co., Ltd.

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5.2.2 Precautions for wiring Version 1.10 compatible CC-Link dedicated
cable
(1) Precautions for wiring
(a) Usage of CC-Link cables
The Version 1.10 compatible CC-Link cable cannot be used together
with other CC-Link cables (CC-Link dedicated cable and CC-Link
dedicated high-performance cable)
When used together, normal data communication cannot be expected.
(b) Branching of CC-Link cable
Connect network modules only with CC-Link cables.
Repeater hubs and connectors cannot be used.
(c) Grounding of CC-Link cable
Ground both ends of the shielded wire of the Version 1.10 compatible
CC-Link dedicated cable to the protective ground conductor by
connecting to "SLD" of each network module via "FG".
The SLD and FG are connected within the module.
(d) Connecting a terminating resistor
For the network module at both ends, connect the DA and DB by a
terminating resister (110 , 1/2W) provided with the module.
(e) Connecting/disconnecting Version 1.10 compatible CC-Link dedicated
cable
Shut off all phases of the external power supply for the system.
(2) Connection of cable
(a) Connection method
Connect a blue, white, and yellow cable to the DA, DB, and (DG)
respectively.
In addition, use terminating resistors for the stations at both ends.
DA
DB
(DG)
SLD
FG
DA
DB
FG
SLD
DA
DB
FG
SLD
Version 1.10
compatible CC-Link
dedicated cable
(DG) (DG)
Terminating
resistor
(110 , 1/2W)
Terminating
resistor
(110 , 1/2W)
Version 1.10
compatible CC-Link
dedicated cable
(blue)
(White)
(Yellow)
(b) Wiring to spring clamp terminal block
For the wiring method of a cable to a spring clamp terminal block, refer
to Section 5.1.2 (2)(b) in this manual.

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5.3 Connecting Twisted Pair Cable, and Bar Terminal for the Version 1.10
Compatible CC-Link Dedicated Cable
This section explains connecting method of bar terminal and cable.
(1) Applicable solderless terminals (bar terminals) and crimping tools
Product name Model Manufacturer Remarks
Bar-type
solderless
terminal
FA-VTC125T9 0.3 to 1.65mm2
Tool for bar-type
solderless
terminal
FA-NH65A
For inquiries and orders, please
contact your local Mitsubishi
Electric Engineering Co., Ltd
representative. -
Bar-type
solderless
terminal
TE0.5-10 0.3 to 0.5mm2
Tool for bar-type
solderless
terminal
NH-79
For inquiries and orders, please
contact your local NICHIFU
TERMINAL MFG. Co., Ltd
representative. -
Bar-type
solderless
terminal
AI0.5-10WH 0.5mm2
CRIMPFOX UD6 -
CRIMPFOX
UD6-4 *1
CRIMPFOX
UD6-6 *1
Tool for bar-type
solderless
terminal
CRIMPFOX ZA3
For inquiries and orders, please
contact your local Phoenix
Contact representative.
-
*1: If a shielded or FG wire is crimped to a bar terminal using the CRIMPFOX UD6-4 or
CRIMPFOX UD6-6, the wire may not be connected to the terminal block depending on the
condition of cross section of the bar terminal after crimping.

13
(2) Stripping the cable end
Use an appropriate tool to crimp the bar terminal. (Refer to (1) in this
section)
For details of the crimping method, refer to the manuals of the bar terminal
or crimping tool used.
In the example, a crimping tool "FA-VTC125T9" manufactured by
Mitsubishi Electric Corporation is used.
1) Strip the cable jacket by 5.5mm to 6.5mm.
2) Place the terminal in the correct place (in the end) of the locater.
3) Insert the terminal until it reaches to the locater.
4) Insert the stripped cable into the terminal and crimp it.