Westermo DDW-142-EX - Manual (Page 16)

16 6642-22521
Ethernet TX
Electrical specification
IEEE std 802.3. 2005 Edition
Data rate 10 Mbit/s, 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/MDIX
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 2
* 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.
Console
Electrical specification
LVTTL/LVCMOS-level
Data rate 115.2 kbit/s
Data format 8 data bits, none parity, 1 stop bit, no flow control
Circuit type SELV
Connection 2.5 mm jack, use Westermo cable 1211-2027
USB
Electrical specification
USB 2.0 host interface
Data rate Up to 12 Mbit/s (full-speed mode)
Circuit type SELV
Maximum supply current 500 mA
Connection USB receptacle connector type A