Westermo DDW-221 - Manual (Page 10)

10 6642-22102
Interface specifications
Power
Rated voltage 20 to 48 VDC
Operating voltage 16 to 60 VDC
Rated current 300 mA @ 20 VDC
150 mA @ 48 VDC
Rated frequency DC
Inrush current, I 2 t 3.1 A 2 s
Startup current* 400 mA
Polarity Reverse polarity protected
Redundant power input Yes
Isolation to Ethernet, SHDSL
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm 2 (AWG 24 – 12)
Shielded cable Not required
* If external power supply is used it must meet specified inrush current.
SHDSL
Electrical specification ITU-T G.991.2 Annex B
Data rate 192 kbit/s to 5696 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 Power, Ethernet
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm 2 (AWG 24 – 12)
Shielded cable Not required
Number of ports 2
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
Transmission range 100 m / 328 ft
Isolation to Power, SHDSL
Connection RJ-45
Shielded cable Not required, except when installed in Railway applications as
signalling and telecommunications apparatus and located close
to rails**
Number of ports 4 ports marked as 1, 2, 3, 4
** 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.