ABB NE870, User Manual, Page: 21 / 36

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Section 3 Interface Modules
Section 3 Interface Modules
Eight Copper Ports
All ports support category 5e cable or better and can handle cable lengths up to 150
m (492 ft).
Interface Specifications
* Note: Railway installation close to the rails. To minimise the risk of interference, a shielded cable is recommended when
the cable is located inside 3 m boundary to the rails and connected to this port. The cable shield should be properly
connected (360°) to an earthing point within 1 m from this port. This earthing point should have a low impedance
connection to the conductive enclosure of the apparatus cabinet, or similar, where the unit is built-in. This conductive
enclosure should be connected to the earthing system of an installation and may be directly connected to the
protective earth. For more information, see “ Safety ”.
8-Copper Ports
Electrical specification IEEE std 802.3. 2005 Edition
Data rate 10 Mbit/s or 100 Mbit/s, Manual or Auto
Duplex Full or half, Manual or Auto
Circuit type TNV-1
Transmission range Up to 150 m with CAT5e cable or better*
Isolation to All other
Connection RJ-45 auto MDI/MDI-X
Shielded cable Not required, except when installed in Railway
applications as signalling and telecommunications
apparatus and located close to rails*
Conductive housing Yes
Number of ports 8