60
Wiring Section 3-2
Note NE1A-series Controller link settings must match the communications mode
settings of connected switching hubs. If they do not match, links will be unsta-
ble and normal communications will not be possible. For EtherNet/IP I/O com-
munications (tag data link communications) with an EtherNet/IP standard
originator, it is recommended that auto-negotiation or 100M full-duplex com-
munications be set for the Controller and the switching hubs.
Ethernet Connectors 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
(conforming to ISO 8877)
Note The NE1A-series Controller Ethernet ports support the auto-MDI/MDI-X func-
tionality, so either a straight or cross cable can be used.
Connecting the Cable
!Caution Turn OFF the power to the NE1A-series Controller before connecting or dis-
connecting twisted-pair cable.
!Caution Allow enough space for the bending radius of the twisted-pair cable as shown
in below.
NE1A-series
Controller
Auto-
negotiation
10 Mbps 100 Mbps
Switching
hub
Full Half Full Half
Auto-negotiation Recommended Not connectible Connectible Not connectible Connectible
10 Mbps Full Not connectible Connectible Not connectible Not connectible Not connectible
Half Connectible Not connectible Connectible Not connectible Not connectible
100 Mbps Full Not connectible Not connectible Not connectible Recommended Not connectible
Half Connectible Not connectible Not connectible Not connectible Connectible
Connector pin Signal name Abbr. Signal direction
1 Transmission data + TD+ Output
2 Transmission data – TD– Output
3 Reception data + RD+ Input
4 Not used. --- ---
5 Not used. --- ---
6 Reception data – RD– Input
7 Not used. --- ---
8 Not used. --- ---
Hood Frame ground FG ---
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