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2.4 Maintenance
The DX940e is designed to be replaced as a unit. There are no servicing requirements and there are no user-
repairable/replaceable components in this device including the RTC lithium-ion ba ery. Maintenance is limited to
replacing the unit.
The following sec ons detail disconnec ng all connec ons to the chassis, removing the chassis, cleaning op cal
devices and packing the DX940e for return to the manufacturer. If it is s ll possible to connect a terminal to the
malfunc oning DX940e and retrieve any configura on data from the device, do so prior to removing power.
2.4.1 Removing the DX940e
Removing the DX940e entails disconnec ng the network cabling, disconnec ng the power and ground lines, and
removing the chassis from the rack or other installa on loca on. The unit can then be packed for shipment to the
manufacturer.
2.4.1.1
Disconnec ng Network Cables
The sequence for removal of the serial and Ethernet cables is not important, but it is important to note that there
are ac ve devices connected to each end of the cable.
1)
Remove all of the Async DB9 connectors from the serial ports by unscrewing the two cap ve screws on
each cable and pulling the connector off the port. (Label the connector with the port number if the cable is
to be reconnected at some later me.)
2)
Remove the Ethernet RJ45 connectors from the Ethernet ports by pressing on the clip on the underside of
the modular connector and pulling the connector straight out. (Label the connector with the port number
if the cable is to be reconnected at some later me.) Repeat for the RJ48 WAN connector.
2.4.1.2
Disconnec ng Power and Ground Lines
ELECTRICAL WARNING: Before disconnec ng either AC or DC power connec ons at the
DX940e ensure that the facility power has first been turned off. Failure to shut power off
prior to removing the power connec ons could expose you to dangerous voltages causing
injury or death.
Follow the procedure below to disconnect the power and ground lines.
1)
Verify that power to the DX940e is turned off.
2)
Use a screw driver to loosen the two screws that ghten the wire clamps in the power connector. Remove
the wires from the connector.
ELECTRICAL WARNING: If the wires are not to be used immediately properly insulate them
to ensure that an accidental turning on of the power will not cause a short or electrical
hazard.
3)
Remove the ground wire from the chassis by loosening the Ground Lug.
