Westermo DDW-120 - Manual (Page 16)

16 6621-2214
* 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.
Ethernet TX
Electrical specification IEEE std 802.3. 2000 Edition
Data rate 10 Mbit/s, 100 Mbit/s, manual or auto
Duplex Full or half, manual or auto
Circuit type SELV
Transmission range 100 m
Isolation to All other
Connection RJ-45 MDI or 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 Isolated to all other circuits
Miscellaneous If Auto-Neg. is disabled then this interface will be set MDI
Number of ports 1
DSL
Electrical specification IEEE G.991.2 Annex B
Data rate 192 kbit/s to 15304 kbit/s
Protocol EFM according to IEEE 802.3-2004
Transmission range According to ITU-T G.991.2 depending on the line quality
Protection Overcurrent / overvoltage protection circuit and varistor
Isolation to All other
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm 2 (AWG 24 - 12)
Shielded cable Not required