Setting the end-of-line switches
The network devices at each end of an FC Bus segment must be set as network terminated devices.
The network engine has two EOL switches (one for each FC Bus) that enable you to set the network
engine as a network terminated device on the bus.
To set a network engine as an FC Bus terminated device, position the switch on the EOL switch
block to the ON position (Figure 16).
Figure 16: FC Bus EOL switch in the factory default ON (up) position
Note:
The EOL switches on the network engine are factory set to ON (Figure 16). If the network
engine is not a terminated device on the FC Bus, reposition the switch on the EOL switch block
to the Off (down) position.
Set the EOL switches appropriately for the FC A and FC B buses. The network engine follows the
same rules as other switch-terminating devices listed in the
Setting Terminations
sections of the
N2 Communications Bus Technical Bulletin (LIT-636018)
and the
MS/TP Communications Bus Technical
Bulletin (LIT-12011034)
.
Powering on the Network Engine
Apply power to the network engine by plugging in the gray 2-pin terminal connector to the power
terminal port on the network engine (Figure 1). The network engine requires approximately 3
minutes to start up and become operational. See the
section.
Startup is complete and the network engine is operational when the (green) RUN LED is On steady
and the (red) GEN FAULT LED is Off. See Figure 17 for LED locations.
Disconnecting power from the Network Engine
Important:
The data protection battery must be installed and charged before disconnecting
the 24 VAC supply power.
Disconnect power from the network engine by removing the gray 2-pin terminal block from the
power terminal port on the network engine (Figure 1).
When you remove 24 VAC power from the network engine, or supply power is lost, the network
engine is nonoperational. The POWER LED (Figure 17) remains On, and the data protection battery
continues to power the network engine for approximately 1 to 3 minutes so that volatile data can
be backed up in nonvolatile memory. The POWER LED goes Off when the data backup is completed.
NAE55/NIE55 Installation Guide
18
