Precautions On Laying Twisted-Pair Cable; Ethernet Connectors; Connecting The Cable - Omron CP1L-EL20DR-D Operation Manual

Network Installation

Precautions on Laying Twisted-pair Cable

Basic Precautions
Environment Precautions
Hub Installation
Environment Precautions
Hub Connection Methods

Ethernet Connectors

Connecting the Cable

!Caution Turn OFF the PLC's power supply before connection or disconnecting twisted-
!Caution Allow enough space for the bending radius of the twisted-pair cable.
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• Press the cable connector in firmly until it locks into place at both the hub
and the PLC.
• After laying the twisted-pair cable, check the connection with a 10Base-T
cable tester.
• The UTP cable is not shielded, and the hub is designed for use in OA
environments. In environments subject to noise, construct a system with
shielded twisted-pair (STP) cable and hubs suitable for an FA environ-
ment.
• Do not lay the twisted-pair cable together with high-voltage lines.
• Do not lay the twisted-pair cable near devices that generate noise.
• Do not lay the twisted-pair cable in locations subject to high temperature
or high humidity.
• Do not lay the twisted-pair cable in locations subject to excessive dirt and
dust or to oil mist or other contaminants.
• Do not install the hub near devices that generate noise.
• Do not install the hub in locations subject to high temperature or high
humidity.
• Do not install the hub in locations subject to excessive dirt and dust or to
oil mist or other contaminants.
If more hub ports are required, they can be added by connecting more than
one hub. There are two possible connection methods for hubs: Cascade and
stacked.
The following standards and specifications apply to the connectors for the
Ethernet twisted-pair cable.
• Electrical specifications: Conforming to IEEE802.3 standards
• Connector structure: RJ45 8-pin Modular Connector
Connector Pin
1 Transmission data +
2 Transmission data -
3 Reception data +
4 Not used
5 Not used
6 Reception data -
7 Not used
8 Not used
Hood Frame ground
pair cable.
(conforming to ISO8877)
Signal Name Abbr.
TD+
TD-
RD+
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RD-
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FG
Section 6-3
Signal Direction
Output
Output
Input
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Input
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