6
5. External Wiring
5.1 Connecting to the 10BASE-T/100BASE-TX
Use the twisted pair cable that meets IEEE802.3 10BASE-T/100BASE-TX
standards when connecting to the 10BASE-T/100BASE-TX interface.
(1) For 100Mbps
Use either of the following cables.
(a) Unshielded twisted pair cable (UTP cable), Category 5
(b) Shielded twisted pair cable (STP cable), Category 5
(2) For 10Mbps
Use either of the following cables.
(a) Unshielded twisted pair cable (UTP cable), Category 3 (4,5)
(b) Shielded twisted pair cable (STP cable), Category 3 (4,5)
POINT
During the high speed communication (100Mbps) via 100BASE-TX
connection, a communication error may occur due to the effect of high
frequency noise generated from the device other than programmable
controller, depending on the installation environment.
Take the following countermeasures on the Web server module side to
eliminate the effect of high frequency noise.
(1) Wiring
y
Do not bundle the twisted pair cables with the main circuit or power cables
or bring them close to each other.
y
Make sure to place the twisted pair cable in a duct.
(2) Cable
y
In the environment where the cable is susceptible to noise, use the
shielded twisted pair cable (STP cable).
(3) 10Mbps communication
y
Connect the 10Mbps-compatible device with Web server module, and
then transmit the data to the device at transmission speed of 10Mbps.
