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5. External wiring
5.1 10BASE-T/100BASE-TX Connection
Sufficient safety precautions must be taken when installing the 100BASE-TX and
10BASE-T networks.
Consult a specialist when connecting cable terminals or installing trunk line
cables, etc.
(1) Twisted pair cable
Twisted pair cables are used for connection to 10BASE-T/100BASE-TX
interfaces.
Use the twisted pair cable that meets IEEE802.3 10BASE-T/100BASE-TX
standards.
(a) For 100Mbps
Either of the following 1) and 2) can be used.
1) Unshielded twisted pair cable (UTP cable), Category 5
2) Shielded twisted pair cable (STP cable), Category 5
(b) For 10Mbps
Either of the following 1) and 2) can be used.
1) Unshielded twisted pair cable (UTP cable), Category 3 (4, 5)
2) 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 high frequency noise
generated from the device other than C Controller module, depending on the
installation environment.
When configuring the network system, take the following measures on the C
Controller module side to eliminate the effect of high frequency noise.
1) Wiring
• Keep the twisted pair cables away from the main circuit or power cables.
• Make sure to place the twisted pair cables in a duct.
2) Cable
• In the environment where the cable is susceptible to noise, use the
shielded twisted pair cable (STP cable).
3) Retry processing
• In the environment where cables are susceptible to noise, include the retry
processing in the user program.
4) 10Mbps communication
• Connect the 10Mbps-compatible device to C Controller module, and then
transmit data at transmission speed of 10Mbps.
(2) Hub
The C Controller module discriminates between 10BASE-T and
100BASE-TX and between full-duplex and half-duplex communication
modes according to the hub.
When connecting to the hub that does not have the auto negotiation
function, set the hub to operate in the half-duplex communication mode.
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