Mitsubishi Electric Melsec Q Series User Manual page 41

2
SYSTEM CONFIGURATION
(2) Twisted pair cable (sold separately)
Use twisted pair cable that meets IEEE 802.3 10BASE-T/100BASE-TX standards.
(a) For 100 Mbps
(b) For 10 Mbps
Either 1) or 2) of the following can be used.
1) Unshielded twisted pair (UTP) cable
Straight cable: Category 5 or higher
Crossing cable: Category 5 or 5e
2) Shielded twisted pair (STP) cable
Straight cable: Category 5 or higher
Crossing cable: Category 5 or 5e
Either 1) or 2) of the following can be used.
1) Unshielded twisted pair (UTP) cable
Straight cable: Category 3 or higher
Crossing cable: Category 3 to 5e
2) Shielded twisted pair (STP) cable
Straight cable: Category 3 or higher
Crossing cable: Category 3 or 5e
During high speed communication (100 Mbps) via 100BASE-TX connection,
communication errors may occur due to the effect of high frequency noise
generated from the equipment other than programmable controller, depending on
the installation environment.
Take the following countermeasures on the MES interface module side to
eliminate the effect of high frequency noise when constructing the network
system.
(1) Wiring
• Do not install the twisted pair cables together with the main circuit or
power lines, or bring them close to each other.
• Make sure to place the twisted pair cable in a duct.
(2) Cable
• In the environment where the cable is susceptible to noise, use the
shielded twisted pair cable (STP cable).
(3) 10 Mbps communication
• Connect the 10 Mbps-compatible equipment with the MES interface
module and transmit the data to the equipment at a transmission speed of
10 Mbps.
2.3 Connection System Equipment
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