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FC Bus Modular Jack
The 6-pin modular jack labeled FC BUS is an FC Bus service port for MS/TP applications (only).
Note: Do not connect an N2 trunk to the 6-pin modular FC Bus jack.
Refer to the N2 Communications Bus Technical Bulletin (LIT-636018) or the MS/TP Communications Bus Technical
Bulletin (LIT-12011034) for additional information and guidelines on wiring devices on an N2 trunk or an MS/TP
trunk.
LON Port
MS-NIE392x-x and MS-NIE492x-x models support one L
trunk to the 3-wire terminal block terminal labeled LON. The cable Shield (SHD) on the L
and is not connected in the NIE.
Serial Ports
The RS232C A and RS232C B serial ports
using a standard 9-pin female data terminal equipment (DTE) to 9-pin female DTE null modem cable. Integration of
only one device is permitted.
If the RS232C A serial port is not used to integrate a vendor protocol, you can connect to a computer serial port to
browse to the NIE or to connect to a VT100 or a computer with a VT100 emulator and perform diagnostic procedures.
If the RS232C B serial port is not used to integrate a vendor protocol, you can use the port to connect to an external
modem. Refer to the Metasys® System Extended Architecture Direct Connection and Dial-Up Connection Application
Note (LIT-1201639) for more information.
USB Port
The port connects to an external flash drive that can store diagnostic information when the NIE is placed in diagnostic
mode. You can otherwise configure the USB serial port to use an optional, user-supplied external modem.
Ethernet Port
The Ethernet port, labeled ETHERNET, is an 8-pin RJ-45 network port
networks. NIE39/49 engines can connect to Ethernet networks at 10 or 100 Mbps. Use this port for connecting a
Modbus TCP, M-Bus TCP, or KNX network.
Wiring the NIE
Important: Do not connect 24 VAC supply power to the NIE before finishing wiring and checking all wiring
connections. Short circuits or improperly connected wires may result in permanent damage to the
equipment.
Important: Use copper conductors only. Make all wiring in accordance with local, national, and regional regulations.
The NIE is a low-voltage (<30 VAC) device. Do not exceed the NIE electrical ratings.
Important: Do not remove the terminal block keys. The terminal block plugs and the terminal sockets are keyed
to fit together in the correct configuration only.
Important: Prevent any static electric discharge to the NIE. Static electric discharge can damage the NIE and void
any warranties.
Important: Make sure the building automation network wiring meets the specifications, rules, and guidelines in
the
Power Supply, Network, and Bus Connections
Mount the NIE securely before wiring the NIE. See the
NIE39/NIE49 Installation Instructions
W
ON
ORKS
(Figure
1) provide direct connection to a Modbus RTU or M-Bus network
section in this document.
Mounting
section.
network trunk. Connect a L
ON
(Figure
1) for connecting the NIE to Ethernet
W
network
ON
ORKS
port is an open terminal
5
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