4 Wiring
27
FX
3U
-J1939 User's Manual
1
Introduc
tion
2
Specifi
cations
3
Inst
allati
on
4
Wi
rin
g
5
Al
lo
ca
tion of
Buf
fer
Memor
ies
6
J1939 C
omms
Mode
7
La
ye
r 2
C
omm
uni
cation
M
ode
8
PL
C RUN>
S
TOP
Me
ssag
es
9
Co
mmand
Interface
10
Comm
uni
cation
Setti
ngs
Proc
edure
4. Wiring
WIRING PRECAUTIONS
•
Make sure to cut off all phases of the power supply externally before attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
WIRING PRECAUTIONS
•
Perform class D grounding (grounding resistance: 100
or less) to the shield of the twisted shield cable (refer to Subsection 4.2.3).
Do not use common grounding with heavy electrical systems.
•
When drilling screw holes or wiring, make sure cutting or wire debris does not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
•
Install module so that excessive force will not be applied to communication connectors or communication cables.
Failure to do so may result in wire damage/breakage or PLC failure.
•
Make sure to affix the CAN bus connector with fixing screws.
Tightening torque should follow the specifications in the manual.
Loose connections may cause malfunctions.
•
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.
•
Place the communication cable in grounded metallic ducts or conduits both inside and outside of the control panel whenever possible.
