ABB NE820, User Manual

Page: 16 / 44

Section 2 Interface specifications
16 3BSE080635
Conductive
housing
Yes Connection RJ-45 auto MDI/MDI-X
IO / Relay output Shielded
cable
Not required, except when
installedin Railway applications
as signallingand telecommuni-
cations apparatusand located
close to rails*.
Connect
resistance
30 W Conductive
housing
Yes
Isolation to All other Number of
ports
3
Connection Detachable screw
terminal
* Note: Railway installation close to the rails.
To minimise the risk of interference, a shield -
ed 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 imped-
ance 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 connect-
ed to the protective earth.
Refer to Safety section for more information.
Connector size 0.2 – 2.5 mm
2
(AWG
24 – 12)
Maximum
voltage/current
60 VDC / 80 mA
IO / Digital input
Voltage levels Vih > 8V Vil < 5V
Iin = 2.9mA @60V
Isolation to All other
Connection Detachable screw
terminal
Connector size 0.2 – 2.5 mm
2
(AWG
24 – 12)
Maximum
voltage
60 VDC