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WIRING PRECAUTIONS
Make sure to properly wire to the terminal block (CAN bus connector) in
accordance with the following precautions.
Failure to do so may cause electric shock, equipment failures, a short-circuit,
wire breakage, malfunctions, or damage to the product.
- The disposal size of the cable end should follow the dimensions described
in the manual.
- Tightening torque should follow the specifications in the manual.
- Twist the end of strand wire and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires
of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected
parts are directly stressed.
Make sure to observe the following precautions in order to prevent any
damage to the machinery or accidents due to abnormal data written to the
PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the
main circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take
place. As a guideline, lay the control line at least 100 mm (3.94") or more
away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of a shielded cable.
Do not use common grounding with heavy electrical systems (refer to
the manual of the PLC main unit).
Place the communication cable in grounded metallic ducts or conduits both
inside and outside of the control panel whenever possible.
3.1 Applicable Cable and Connector
3.1.1
Applicable connector
FX
-J1939 uses a CAN bus connector. This connector is removable.
3U
For removal and installation of the CAN bus connector, refer to the following
section.
Refer to subsection 3.1.4
3.1.2
Applicable cable
Applicable Cable
Item
SAE J1939-11, CAN (Layer 2)
SAE J1939-15
Cable Type
Twisted pair cable
Unshielded/Shielded
Shielded
Unshielded
No. of Pairs
2 pair
Conformance Standard
ISO 11898/1993
Wire Size
0.3 mm
2
to 0.82 mm
2
(AWG22 to 18)
120
Impedance
*1 Shielded twisted pair cable is recommended.
*2 When bus length is long, use thicker wire. For details, refer to the following
manual.
FX
3U
-J1939 User's Manual
3.1.3
Termination of cable end
Strip 9 mm (0.35") of insulation from the end of the wire.
In case of stranded wires, use wire ferrules. Refer to the
following manual.
FX
-J1939 User's Manual
3U
The tightening torque must be 0.4 to 0.5 N
m.
Do not tighten terminal screws with a torque outside the above-mentioned range.
Failure to do so may cause equipment failures or malfunctions.
3.1.4
Removal and installation of CAN connector
1) Removal
Evenly unscrew both CAN connector mounting screws, and remove the
CAN connector from the module.
If the cable is attached to the connector, hold and pull the connector on the
side. Do not pull the cable.
2) Installation
Place the CAN connector in the specified position, and evenly tighten both
CAN connector mounting screws.
Tightening torque 0.4 to 0.5 N
m
Do not tighten the terminal block mounting screws with a torque outside the
above-mentioned range.
Failure to do so may cause equipment failures or malfunctions.
3.2 CAN-Bus Wiring
3.2.1
Connecting communication cables
CAN_GND
CAN_GND
CAN_L
CAN_L
CAN_SHLD
CAN_SHLD
CAN_H
CAN_H
CAN_V+
CAN_V+
Terminating
resistor
Grounding resistance of 100 Ω or less (Class D)
For electromagnetic compatibility (EMC), it is recommended to ground the cable shield
at both ends.
Caution
For safety, always check the potential differences between the grounding points. If
potential differences are found, proper measures must be taken to avoid damage.
3.2.2
Module wiring
For PLC wiring details, refer to the following manual.
Refer to the FX
Series User's Manual - Hardware Edition
3G
Refer to the FX
Series User's Manual - Hardware Edition
3GC
Refer to the FX
3U
Series User's Manual - Hardware Edition
Refer to the FX
Series User's Manual - Hardware Edition
3UC
FX
-
3U
J1939
FX
/
3G
3GC *1
FX
/
3UC *1
FX
/FX
3U
Series PLC
Grounding resistance of
100 Ω or less (Class D)
Strip a part of the coating of the shielded twisted pair cable as shown subsection 3.2.3.
Ground the PLC's grounding terminal there.
*1
*1 An FX
-CNV-IF or FX
-1PS-5V is necessary to connect the FX
2NC
3UC
an FX
/FX
Series PLC.
3GC
3UC
3.2.3
Grounding of twisted pair cable
*2
Strip a part of the coating of the shielded twisted pair cable as shown below, and
ground at least 35 mm (1.38") of the exposed shield section.
Shielded twisted pair cable
Shield
3.2.4
Termination
The J1939 network requires terminating resistors for both network ends. When FX
J1939 is the network end, connect the included terminating resistor (120 1/2W)
between pin number 2 (CAN_L) and 4 (CAN_H).
9mm
3.3 Grounding
(0.35")
For details, refer to the following manual.
4. Specifications
DESIGN PRECAUTIONS
Make sure to have the following safety circuits outside of the PLC to ensure safe
system operation even during external power supply problems or PLC failure.
Otherwise, malfunctions may cause serious accidents.
1) Most importantly, have the following: an emergency stop circuit, a protection
circuit, an interlock circuit for opposite movements (such as normal vs.
reverse rotation), and an interlock circuit (to prevent damage to the
equipment at the upper and lower positioning limits).
2) Note that when the PLC CPU detects an error, such as a watchdog timer
error, during self-diagnosis, all outputs are turned off. Also, when an error
that cannot be detected by the PLC CPU occurs in an input/output control
block, output control may be disabled.
External circuits and mechanisms should be designed to ensure safe
machinery operation in such a case.
For the operating status of each node in the case of a communication error, see
the FX
3U
-J1939 user's manual and the product manual of each node.
Erroneous output or malfunctions may cause an accident.
DESIGN PRECAUTIONS
When executing control (data changes) to an operating PLC, construct an
interlock circuit in the sequence program so that the entire system operates safely.
CAN_GND
In addition, when executing control such as program changes and operation
CAN_L
status changes (status control) to an operating PLC, thoroughly read the manual
CAN_SHLD
and sufficiently confirm safety in advance. Especially in control from external
equipment to a PLC in a remote place, problems in the PLC may not be able to be
CAN_H
handled promptly due to abnormality in data transfer. Construct an interlock circuit
CAN_V+
in the sequence program. At the same time, determine the actions in the system
between the external equipment and the PLC for protection against abnormalities
Terminating
in data transfer.
resistor
DESIGN PRECAUTIONS
Make sure to observe the following precautions in order to prevent any damage to
the machinery or accidents due to abnormal data written to the PLC under the
influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main
circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take place.
As a guideline, lay the control line at least 100 mm (3.94") or more away from
the main circuit or high-voltage lines.
2) Ground the shield wire or shield of a shielded cable.
Do not use common grounding with heavy electrical systems (refer to the
manual of the PLC main unit).
CAN Bus connector
STARTUP AND
CAN_GND
MAINTENANCE
PRECAUTIONS
CAN_L
CAN_SHLD
Do not disassemble or modify the PLC.
CAN_H
Doing so may cause fire, equipment failures, or malfunctions.
CAN_V+
For repair, contact your local Mitsubishi Electric representative.
Turn off the power to the PLC before connecting or disconnecting any extension
cable.
Failure to do so may cause equipment failures or malfunctions.
Grounding mounting plate
Do not drop the product or exert strong impact to it.
or grounded DIN rail with
Doing so may cause damage.
a grounding resistance of
100 Ω or less (Class D).
DISPOSAL PRECAUTIONS
Please contact a certified electronic waste disposal company for the
-J1939 to
environmentally safe recycling and disposal of your device.
3U
TRANSPORTATION AND
STORAGE PRECAUTIONS
The PLC is a precision instrument. During transportation, avoid impacts larger
than those specified in the general specifications of the PLC main unit manual.
Failure to do so may cause failures in the PLC. After transportation, verify the
operations of the PLC.
4.1 Applicable PLC
Model name
-
3U
FX
3G
Series PLC
Ver. 1.00 and later (Up to 8 blocks can be extended
FX
Series PLC
*1
Ver. 1.40 and later (Up to 8 blocks can be extended
3GC
FX
Series PLC
Ver. 2.20 and later (Up to 8 blocks can be extended
3U
FX
Series PLC
*1
Ver. 2.20 and later (Up to 8 blocks can be extended
3UC
FX
3U
-J1939 User's Manual
The version number can be checked by reading the last three digits of device D8001/
D8101.
*1 An FX
2NC
-CNV-IF or FX
3UC
an FX
/FX
Series PLC.
3GC
3UC
*2 Check the current consumption of the connected extension blocks and insert
extension power supply units if necessary.
*3 Up to 7 units can be connected to the FX
4.2 General Specifications
Items other than the following are equivalent to those of the PLC main unit.
For general specifications, refer to the manual of the PLC main unit.
Refer to the FX
Refer to the FX
Refer to the FX
Refer to the FX
Item
Dielectric Withstand Voltage
Insulation Resistance
4.3 Power Supply Specification
Internal Power Supply
For details on the 24 V DC power supply of main unit, refer to the manual of the
PLC main unit.
4.4 Performance Specifications
Transmission Type
Applicable Function
J1939 Services According to
SAE Standards
Network Size
Communication Method
S u p p o r t e d
Transmission
Speed / Max.
Bus Length
Connection Cable
Terminating Resistor
No. of Occupied I/O Points
Applicability
*2
)
This manual confers no industrial property rights or any rights of any other kind,
*2
)
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
*2
)
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
*2*3
)
Warranty
Mitsubishi will not be held liable for damage caused by factors found not to be
the cause of Mitsubishi; opportunity loss or lost profits caused by faults in the
-1PS-5V is necessary to connect the FX
3U
-J1939 to
Mitsubishi products; damage, secondary damage, accident compensation
caused by special factors unpredictable by Mitsubishi; damages to products
other than Mitsubishi products; and to other duties.
-32MT-LT(-2) PLC.
3UC
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in
a device or system used in purposes related to human life.
Series User's Manual - Hardware Edition
3G
Before using the product for special purposes such as nuclear power, electric
Series User's Manual - Hardware Edition
3GC
power, aerospace, medicine or passenger movement vehicles, consult with
3U
Series User's Manual - Hardware Edition
Mitsubishi Electric.
Series User's Manual - Hardware Edition
3UC
This product has been manufactured under strict quality control. However
Specification
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
500 V AC for one minute
Between all
t e r m i n a l s a n d g r o u n d
5 M or more by 500 V
terminal
DC megger
HEAD OFFICE : TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
Item
Specification
24 V DC, max 110 mA
24 V DC power is supplied internally from the main
unit.
Item
Specification
CAN Bus network
J1939 Node or CAN Layer 2 Node
SAE J1939, SAE J1939-11, SAE J1939-15,
SAE J1939- 21, SAE J1939-71, SAE J1939-73,
SAE J1939-75, SAE J1939-81
SAE J1939-11 2 to 30 nodes / segment
SAE J1939-15 2 to 10 nodes / segment
CAN (Layer 2) 2 to 127 nodes
Cyclic, acyclic or request driven
SAE J1939-11 250 kbps / 40 m (131'2"), stubs max. 1 m (3'3")
SAE J1939-15 250 kbps / 40 m (131'2"), stubs max. 3 m (9'10")
1 Mbps / 25 m (82')
800 kbps / 50 m (164')
500 kbps / 100 m (328'1")
250 kbps / 250 m (820'2")
CAN (Layer 2)
125 kbps / 500 m (1640'5")
100 kbps / 600 m (1968'6")
50 kbps / 1000 m (3280'10")
20 kbps / 2500 m (8202'1")
10 kbps / 5000 m (16404'2")
Refer to subsection 3.1.2.
120 Accessory: 120 1/2W)
8 points
(taken from either the input or output points of
the PLC)
For safe use
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