Refer to the QuickLIT website for the most up-to-date version of this document.
Application
Important: NIEx9s are compatible with Metasys® system Release 7.0 and later. You may apply the dual trunk
integration feature to NIEx9s purchased prior to the current release by using the NIEx9 Driver Manager
tool. For information on how to apply the latest package and license files that support dual trunks, refer
to the NIEx9 Driver Manager Application Note (LIT-12011919).
The Network Integration Engine (NIE) 39 and 49 are web-enabled, Ethernet-based, supervisory devices that integrate
the Metasys Building Management System to other standard building management communication technologies.
Integrations include the BACnet® protocol, LONWORKS® network, N2 Bus protocol, Modbus®, Meter-Bus (M-Bus,
European Standard EN 1434-3), KNX, and other third party proprietary protocols for monitoring and supervising a
wide variety of HVAC, lighting, security, fire, electrical and thermal measuring and access control equipment.
For the Modbus and M-Bus protocols, one NIE39 or NIE49 can support two integrations: two Modbus, two M-Bus,
or one of each, significantly expanding the engine's flexibility. See Table 10 for a list of all supported dual trunk
applications.
Important: The NIEx9 is shipped with a license and driver for the communication protocol that was ordered. If you
re-image the engine, the license and driver are deleted and the engine is not able to communicate with
the required protocol. If you need to re-image the engine, use the NIEx9 Driver Manager first to preserve
the protocol driver and license file before you re-image. For details, refer to the NIEx9 Driver ManagerApplication Note (LIT-12011919).
This document describes how to install an NIE39 or NIE49, which is referred to collectively as NIE, unless specified
otherwise. Figure 1 shows the components of the NIE.
Installation
Follow these guidelines when installing the NIE:
•Transport the NIE in the original container to minimize vibration and shock damage to the NIE.
•Verify that all the parts shipped with the NIE.
•Do not drop the NIE or subject it to physical shock.
•Do not open the NIE housing (except the data protection battery compartment). The NIE has no user-serviceable
parts inside.
Parts Included
•one NIE with removable terminal plugs
•one data protection battery (installed and connected when the NIE is shipped)
•one Installation Instructions sheet
Materials and Special Tools Needed
•three M4 (#8) fasteners appropriate for the mounting surface
•one 20 cm (8 in.) or longer piece of DIN rail and appropriate hardware for mounting the DIN rail
1NIE39/NIE49 Installation Instructions
Dimensions and Physical Features
Figure 1: NIE Dimensions and Physical Features
Mounting
Location Considerations
Follow these guidelines when mounting an NIE:
•Ensure that the mounting surface can support the NIE and any user-supplied enclosure.
•
Mount the NIE in proper orientation (Figure 1).
•Mount the NIE on an even surface in wall mount applications whenever possible. If you must mount the NIE on
an uneven surface, be careful not to crack the mounting clips or NIE housing when tightening the screws. Use
shims or washers to mount the NIE evenly on the mounting surface.
•
Mount the NIE in areas free of corrosive vapors, and observe the environmental limitations listed in the Technical
Specifications section.
•Allow sufficient space for cable and wire connections and access to the data protection battery and End-of-Line
(EOL) switch (Figure 1).
•Do not mount the NIE where the ambient temperature may exceed 50°C (122°F).
•Do not mount the NIE on surfaces prone to vibration or in areas where electromagnetic emissions can interfere
with NIE communication.
•Do not obstruct the NIE housing ventilation holes.
•Do not mount power transformers below the NIE.
2NIE39/NIE49 Installation Instructions
On applications where the NIE is mounted inside a panel or enclosure, follow these additional guidelines:
•Do not install the NIE in airtight enclosures.
•Do not install heat-generating devices in the enclosure with the NIE that may cause the ambient temperature to
exceed 50°C (122°F).
Mounting the NIE
Wall Mount Applications
Use the holes in the three mounting clips for wall mount applications.
To mount the NIE on a vertical surface:
1. Ensure that all three mounting clips are inserted into the back of the NIE housing, pulled outward, and snapped
firmly into the extended position (Figure 3).
2. Mark the location of the three wall mount holes using the dimensions in Figure 2, or hold the NIE up to the wall
as a template and mark the locations.
3. Drill holes in the wall at the locations marked in Figure 2 and insert wall anchors (if necessary).
Figure 2: NIE Mounting Screw Hole Dimensions (mm/in.) and Mounting Area Requirements
4. Position the NIE, insert the screws through the holes in the mounting clips, and carefully tighten the screws.
Important: Do not overtighten the mounting screws. Overtightening the screws may damage the mounting
clips or the NIE housing.
DIN Rail Mount Applications
To mount the NIE on a DIN rail:
1. Securely mount a 20 cm (8 in.) or longer section of DIN rail horizontally and centered in the space.
2. Ensure that the bottom two mounting clips are pulled outward and snapped firmly into the extended position
(Figure 3).
3NIE39/NIE49 Installation Instructions
Figure 3: DIN Rail and Mounting Clip Features on the Back of an NIE
3. Hang the NIE by the DIN rail hooks (Figure 3) on the top track of the DIN rail, and position the NIE DIN rail
channel snugly against the tracks of the DIN rail.
4. Push the bottom mounting clips up to secure the NIE on the DIN rail tracks.
To remove the NIE from the DIN rail, snap the bottom DIN clips to the outward extended position, and carefully
lift the NIE off the DIN rail.
Enclosure Mount Applications
Mount the enclosure per the manufacturer’s instructions and mount the NIE in the enclosure following the guidelines
in the Location Considerations and Mounting the NIE sections.
Wiring
Power Supply, Network, and Bus Connections
See Figure 1 for the location of NIE ports, modular jacks, and terminal blocks.
Depending on the model, an NIE39/NIE49 supports either an MS/TP field bus trunk, an N2 Bus trunk, or a LONWORKS
network trunk. All models support two vendor integrations, such as two Modbus, two M-Bus, or one of each. Or if a
KNX integration is required, three KNX IP Gateways are supported for one NIE39/NIE49. See Table 10 for a list of
all supported dual trunk applications. The rules, guidelines, and wiring considerations for each type of network or
field bus application are provided in tables of this document.
Power Supply
In North America, the NIE requires a dedicated Class 2, 24 VAC, 25 VA minimum power supply. Outside North
America, use a 24 VAC safety extra-low voltage (SELV) transformer at the appropriate rating. The minimum input
voltage for the NIE to operate properly is 20 VAC. Maximum power consumption is 25 VA.
FC Bus Port
MS-NIE391x-x and MS-NIE491x-x models support one N2 Bus, one Master-Slave/Token-Passing (MS/TP) Bus,
one Modbus RTU trunk, or one M-Bus on the Field Controller (FC) Bus port. Connect the trunk to the 4-wire terminal
block plug labeled FC BUS. See Table 1 and Table 2 for more information on bus rules and bus device limits.
Note: BACnet® MS/TP, N2, Modbus RTU, and M-Bus are different protocols with different network requirements.
Do not intermix devices from different protocols to the same FC Bus connection.
4NIE39/NIE49 Installation Instructions
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 LONWORKS network trunk. Connect a LONWORKS network
trunk to the 3-wire terminal block terminal labeled LON. The cable Shield (SHD) on the LON port is an open terminal
and is not connected in the NIE.
Serial Ports
The RS232C A and RS232C B serial ports (Figure 1) provide direct connection to a Modbus RTU or M-Bus network
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 (Figure 1) for connecting the NIE to Ethernet
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 section in this document.
Mount the NIE securely before wiring the NIE. See the Mounting section.
5NIE39/NIE49 Installation Instructions
Follow these guidelines when wiring an NIE:
•Route the supply power wires and communication cables at least 50 mm (2 in.) away from the vent slots on the
sides of the NIE housing.
•Provide slack in the wires and cables. Keep cables routed neatly around the NIE to promote good ventilation,
LED visibility, and ease of service.
Wiring the NIE for N2, MS/TP, Modbus RTU, or LONWORKS Protocol
1. Connect the Ethernet cable to the RJ-45, 8-pin Ethernet port on the NIE shown in Figure 1.
2. If using an external modem, connect the modem to USB A using the proper cable.
3. Connect the Building Automation System (BAS) network cables to the appropriate ports.
For an N2, MS/TP, or Modbus RTU network, connect the 3-wire bus cable to the removable 4-terminal blue
•
plug labeled FC Bus (Figure 4).
Note: If an N2 or MS/TP is connected to the NIE, you must set the NIE EOL switches to the proper positions.
See the Setting the End-of-Line Switch section.
•For LONWORKS compatible networks, connect the 2-wire cable from the LONWORKS network trunk to the
removable 3-terminal blue plug labeled LON (Figure 5).
Note: The LONWORKS network trunk is available on the NIE3920-x and NIE4920-x models only.
Figure 4: FC Bus Terminal Block and Wiring Connections
Figure 5: LONWORKS Network Terminal Block and Wiring Connections
4. For Modbus RTU Protocol using the RS232C A or RS232C B serial port, use a cable to connect the
RS-232/RS-485 converter to the RS232C A or RS232C B serial port on the NIE.
6NIE39/NIE49 Installation Instructions
Note: The maximum cable length between devices connected though an RS-232 line depends on the baud
rate used. In general, it should not exceed 15 meters at 9600 baud.
5. Wire from the RS-485 terminal on the converter to the RS-485 port on the vendor device (Figure 6). The RS-485
bus is a two-wire network.
a. Connect the converter's + A terminal to the device's + (or A) terminal.
b. Connect the converter's - B terminal to the device's - (or B) terminal.
c. If the device has a Signal Ground or Reference terminal, connect this to the converter's CG2 terminal.
Figure 6: Connection Between Converter and Device
6. To add additional vendor devices, wire from one device to the next as shown in Figure 7. No more than two wires
may be connected to each terminal to ensure the daisy chain configuration. See Wiring Rules and Guidelines
for Network Integrations for the Modbus protocol.
Figure 7: Daisy Chained Devices
The completed wiring should look similar to Figure 8.
7NIE39/NIE49 Installation Instructions
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