Wiring Precautions; Power Supply/Grounding Wiring; Grounding - Mitsubishi Electric MELSEC iQ-F FX55-ASL-M User Manual

6.4

Wiring Precautions

• Do not run multiple transmission cables (DP, DN) using a multicore cable.
DP
DN
DP
DN
• The voltage should not fall below the lower limit of the allowable voltage range due to voltage drop caused by the cable. If
the voltage falls below the lower limit, malfunctions may occur.
• Do not connect soldered cables directly to the terminals. Doing so may loosen the screws, resulting in a poor contact.
• In the AnyWireASLINK system, signals and power are supplied to a slave module with two transmission cables: DP and
DN. Therefore, use a stranded wire of 1.25  or larger as the main line.
• General-purpose wire, cabtyre cable and flat cable, etc. can be used.
• Use a crimping tool to connect a wire ferrule to a cable.
• Before inserting a wire ferrule, check the shapes of the wire insertion opening and wire ferrule. Then, insert the terminal in
the correct orientation. A wire ferrule wider than the wire insertion opening may damage the terminal block. (Page 47
Wire ferrule)
• Signal names are not printed on the transmission cable terminal block. To avoid incorrect wiring, wire cables to the terminal
block attached to the FX5-ASL-M.
• Do not insert multiple wire ferrules into one wire insertion opening. Doing so may cause damage on the terminal block or
cable, or malfunction.
6.5

Power Supply/grounding Wiring

Power supply/grounding wiring

Grounding

(Grounding
resistance:
100  or less)
FX5U CPU module
Grounding
Perform the following.
• Perform class D grounding. (Grounding resistance: 100  or less)
• Ground the PLC independently if possible.
• If the PLC cannot be grounded independently, perform the "Shared grounding" shown below.
Other
PLC
equipment
Independent grounding
(Best condition)
• Bring the grounding point close to the PLC as much as possible so that the ground cable can be shortened.
6 WIRING
48
6.4 Wiring Precautions
24 V DC
Grounding
(Grounding
resistance:
100  or less)
24V 0V LG
IN
FX5-ASL-M
Other
PLC
equipment
Shared grounding
(Good condition)
DP
DN
DP
DN
Other
PLC
equipment
Common grounding
(Not allowed)