Westermo U200 Installation guide - Manual (Page 12)

V4.2
www.westermo.com
U/R/T200 series
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Auto-MDIO is not supported on the fiber ports. Thus, the user must make sure that the fiber
drop link used is crossed. This is easily verified by checking if the fiber port LED is on or not,
when the fiber drop link is connected between two switches or the switch and a fiber enabled
end node. Manual swooping of the TX/RX drop link on one of the fiber devices is required in
case the LED is off on both devices. This can be done either directly on the switch fiber port
or on a fiber patch panel if this is available (preferably).
3.2 Power Supply Connector
3.2.1 Redundant power inputs
The switch is designed to operate permanently over a very wide range of power input (19 V
DC to 60 VDC). Two redundant inputs are provided to provide enhanced redundancy if either
supply fails.
The power supply draws power from the input that has the highest potential difference when
compared to the alternate supply.
This enables use of e.g. a 48V source as primary supply with a 24VDC battery as back up.
Power supply inputs have reverse polarity protection.
The switch is delivered with a power connector (Wieland 25.621.3553.0) that is suitable for
wires between AWG 20 and AWG 22 (0,34-0,5 mm
2
).
Figure 6, Power contact
3.2.2 Fault Contact
The switch is incorporated with a user configurable fault contact (STAT pin on the power
contact) that enables network and switch faults to be highlighted.
The user configurable fault contact is a solid state component and therefore requires power to
control the device.
As standard the fault contact will always highlight the following:
•
Internal switch watchdog failure.
•
Link / Port 7 Failure (if redundant ring mode is activated)
•
Link / Port 8 Failure (if redundant ring mode is activated)
•
Power Supply Failure
•
Focal Point / Redundancy Mode activated.
•
Time sync error; NMEA reports or PPS missing on RS232/422 interface
Using the Switch configuration software, the fault contact can highlight the following addition
failures: