Note:
The FC-A and FC-B terminals can accept
the MS/TP FC Bus, N2 Bus or ModBus RTU, but
not a mixture of both on the same trunk. For
example, if you want to integrate both MS/TP
and ModBus RTU, select one FC terminal for
MS/TP FC Bus use and the other for N2 Bus use.
Figure 7: FC Bus terminal block and wiring connections
Table 2: FC Bus terminal block wiring
Callout Description
1
FC Bus terminal block
2
FC Bus terminal block plug
3
Terminating wires (3-wire cable shown)
2. To add additional field devices, wire from one device
to the next as shown in Figure 8. Do not connect
more than two wires to each terminal to ensure that
a daisy chain configuration is used.
Figure 8: Daisy chained devices
Table 3: FC Bus terminal block wiring
Callout Description
1
Daisy-chained device on FC Bus segment
2
Terminating device on FC Bus segment
3
FC Bus terminal plugs
4
To next device on FC Bus segment
5
From previous device on FC Bus segment
6
Isolated shield connection terminal
3. Set each
FC EOL
switch to their proper positions. See
Setting the end-of-line switches
Connecting LonWorks devices
About this task:
To connect LonWorks devices, complete the following
steps:
1. Connect the 2-wire cable from the LonWorks trunk
to the removable 3-terminal blue plug labeled LON
(Figure 3). The LonWorks network trunk is available
on the MS-NAE5520-3 model only.
Figure 9: LonWorks network terminal block and wiring
connections
Table 4: LON trunk terminal block wiring
Callout Description
1
LonWorks network terminal block
2
LonWorks network terminal block plug
3
Terminating wires (2-wire cable shown)
Note:
LonWorks network wires are not
polarity sensitive.
2. To add additional vendor devices, wire from one
device to the next in a daisy-chained fashion. Do not
connect more than two wires to each terminal.
Connecting Modbus RTU devices
About this task:
The network engine connects to Modbus RTU devices
directly if the RS485 protocol is in use or by using
a converter if the RS-232 protocol is in use. (After
installation and wiring are complete, refer to the
Network
NAE55 Installation Guide
6