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NAE35/NAE45 Installation Guide
Application
The Network Automation Engine (NAE) is a web-enabled, Ethernet-based, supervisory device that
monitors and controls networks of field-level building automation devices, HVAC equipment, and
lighting.
This document describes how to install NAE35 and NAE45 models, which are referred to collectively
as network engines, unless otherwise specified. These network engines provide integration to the
following network protocols: BACnet/IP, BACnet MS/TP, N2 Bus, and integrations to other building
management communication technologies, including Modbus®, M-Bus, and KNX. At Release
9.0, the Modbus, M-Bus, and KNX integrations are added and licensed during network engine
commissioning. At Release 9.0.7, the Modbus, M-Bus, and KNX integrations are included with the
image of the network engine, already pre-licensed and ready for selection during commissioning.
Important: For existing custom integrations, contact your local Systems Integration Services
(SIS) team before an upgrade. Updated drivers can be provided on request.
Note:
Beginning with Metasys Release 9.0.7, modems (internal and external) and pagers are no
longer supported on NAE35 and NAE45 engines that run the Linux operating system, but are
still supported on prior releases for engines that use a Windows Embedded operating system.
If you receive from the factory a network engine with Release 9.0 that has an internal modem,
you can field-upgrade the engine to Release 9.0.7 to acquire new release enhancements, but
its modem and pager functionality is lost. If you need modem and pager functionality, do not
upgrade the NAE35 or NAE45 engine to Release 9.0.7.
In addition, support for the LonWorks® network is no longer available on the NAE35 and
NAE45 engines at Release 9.0.7. Therefore, do not upgrade to Release 9.0.7 any NAE35 or
NAE45 engine that features the LonWorks integration.
Note: If you receive an NAE35 or NAE45 engine from the factory that is imaged with Release
9.0, you can field-upgrade the engine to Release 9.0.7 if the upgrade is supported.
Installation
Follow these guidelines when installing the network engine:
• Transport the network engine in the original container to minimize vibration and shock damage
to the network engine.
• Verify that all the parts shipped with the network engine.
• Do not drop the network engine or subject it to physical shock.
• Do not open the network engine housing (except the data protection battery compartment). The
network engine has no user-serviceable parts inside.
Parts included
• one NAE35 or NAE45 with removable terminal plugs
• one data protection battery (installed and connected when the network engine is shipped)
• one Installation Instructions sheet
Part No. 24-10050-6 Rev. Z
2019-05-08
Release 9.0, 9.0.7
(barcode for factory use only)
MS-NAE35xx-2, MS-NAE45xx-2
*24100506Z*
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
Dimensions
Figure 1: Front of NAE4511-2 showing dimensions (mm/in.),
physical features, and required mounting space around engine
Table 1: NAE45 physical features
Callout Description
1 Mounting clip
2 Data protection battery compartment
3 24 VAC power terminal
4 6-pin modular field controller service port
5 FC Bus (N2 Bus or FC Bus terminal)
6 End-of-line switch
7 Mounting clip
8 USB port
9 RJ-45 8-pin Ethernet port
10 Mounting clip
11 RS-232 serial port
12 Modem terminal (functional at Release 9.0; not functional at Release 9.0.7)
13 System status LEDs
NAE35/NAE45 Installation Guide2
Mounting
Location considerations
Follow these guidelines when mounting a network engine:
• Ensure that the mounting surface can support the network engine and any user-supplied
enclosure.
• Mount the network engine in proper orientation (Figure 1).
• Mount the network engine on an even surface in wall mount applications whenever possible. If
you must mount the network engine on an uneven surface, be careful not to crack the mounting
clips or network engine housing when tightening the screws. Use shims or washers to mount the
network engine evenly on the mounting surface.
• Mount the network engine 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 network engine where the ambient temperature may exceed 50°C (122°F).
• Do not mount the network engine on surfaces prone to vibration or in areas where
electromagnetic emissions can interfere with network engine communication.
• Do not obstruct the network engine housing ventilation holes.
• Do not mount power transformers below the network engine.
On applications where the network engine is mounted inside a panel or enclosure, follow these
additional guidelines:
• Do not install the network engine in airtight enclosures.
• Do not install heat-generating devices in the enclosure with the network engine that may cause
the ambient temperature to exceed 50°C (122°F).
Mounting the Network Engine
Wall mount applications
Use the holes in the three mounting clips for wall mount applications.
To mount the network engine on a vertical surface:
1. Ensure that all three mounting clips are inserted into the back of the network engine 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
network engine 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).
3NAE35/NAE45 Installation Guide
Figure 2: Network Engine Mounting Screw Hole
Dimensions and Mounting Area Requirements (mm/in.)
4. Position the network engine, 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 network engine housing.
DIN rail mount applications
To mount the network engine 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).
Figure 3: DIN Rail and Mounting Clip Features on the Back of Network Engine
NAE35/NAE45 Installation Guide4
3. Hang the network engine by the DIN rail hooks (Figure 3) on the top track of the DIN rail, and
position the network engine DIN rail channel snugly against the tracks of the DIN rail.
4. Push the bottom mounting clips up to secure the network engine on the DIN rail tracks.
To remove the network engine from the DIN rail, snap the bottom DIN clips to the outward
extended position, and carefully lift the network engine off the DIN rail.
Enclosure mount applications
Mount the enclosure per the manufacturer’s instructions and mount the network engine in the
enclosure following the guidelines in the Location considerations and Mounting the Network
Engine sections.
Wiring
Power supply, network, and bus connections
See Figure 1 for the location of network engine ports, modular jacks, and terminal blocks.
Power supply
In North America, the network engine requires a dedicated Class 2, 24 VAC, 25 VA minimum power
supply. Outside North America, use a 24 VAC SELV transformer at the appropriate rating. The
minimum input voltage for the network engine to operate properly is 20 VAC. Maximum power
consumption is 25 VA.
FC Bus port
MS-NAE351x-x and MS-NAE451x-x models support one N2 Bus trunk or one MS/TP Bus trunk on
the FC Bus port. Connect either an N2 Bus trunk or an MS/TP Bus trunk to the 4-wire terminal block
plug labeled FC BUS.
The Field Controller (FC) Bus connection on an NAE35 and NAE45 is a 4-pin removable, keyed
terminal block labeled FC BUS. The FC bus connection is an optically isolated RS-485 port with a
keyed 4-position terminal block that communicates at 9.6k, 19.2k, 38.4k, or 76.8k baud. Use an FC
Bus port to integrate an N2 network, BACnet MS/TP FC Bus trunk, or third-party network into the
Metasys system.
Note: N2, BACnet MS/TP, Modbus RTU, and M-Bus have different protocols and network
requirements. Do not intermix N2, MS/TP, Modbus, or M-Bus devices on the same FC Bus port.
The SHD connection on the FC terminal block is not connected to any earth ground connection. See
Table 2 and Table 3 for more information on bus rules and bus device limits.
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 network terminal block
The blue, keyed, removable, 3-position LON terminal block connects a LonWorks® network trunk
to network engine models that support a LonWorks network trunk. The Shield (SHD) on the LON
terminal block is soft grounded to the network engine chassis terminal, and you can use it as a
convenient terminal to connect cable shield drains in daisy-chain bus applications that use shielded
cable.
5NAE35/NAE45 Installation Guide
Note: The NAE35 and NAE45 models with the LonWorks integration only support the upgrade
to Release 9.0. Do not upgrade the LonWorks models to Release 9.0.7. You must keep the LON
models at Release 9.0 or earlier.
Serial ports
The network engine has one or two RS-232-C serial ports labeled RS232C A and RS232C B (Figure
1). They are designed for connecting a standard 9-pin female DTE to 9-pin female DTE null modem
cable.
For either release of network engine, you can use the RS232C B port to connect a Modbus RTU
third-party integration. For more information on how to use the serial port for third-party vendor
integration, refer to the application note for the particular vendor integration you are installing.
For a network engine at Release 9.0, you can use the RS232C A serial port in either of two ways.
First, you can connect a computer to this port for browsing the NAE35/45 through a direct
connection. For details, refer to the Metasys® System Extended Architecture Direct Connection and
Dial-Up Connection Application Note (LIT-1201639). Or, you can connect a VT100 or a computer with
a VT100 emulator to this port for performing diagnostic procedures. Also, for a network engine at
Release 9.0 that does not have an internal modem, you can connect an optional external modem to
the RS232C B port. Refer to the NAE Commissioning Guide (LIT-1201519) for information on external
modems.
For a network engine at Release 9.0.7, the two RS232C serial ports do not support external
modems. Also, the RS232C A port is inactive.
USB port
For a network engine at Release 9.0, you can connect an external modem to the USB port labeled
USB. Refer to the NAE Commissioning Guide (LIT-1201519) for modem information.
For a network engine at Release 9.0.7, the use of the USB port to connect an optional external
modem is no longer supported. However, you can use the USB port for debugging purposes when
integrating to a third-party protocol (for example, Modbus, M-Bus, or KNX).
Ethernet port
The Ethernet connection (10 or 100 Mbps) is an 8-pin RJ-45 network port (Figure 1). Use the
Ethernet port to connect to IP networks.
Optional Internal Modem
The MS-NAE35x1-x and MS-NAE45x1-x models at Release 9.0 have an optional internal modem
and a 6-pin modular jack labeled MODEM. Insert a standard phone line plug to connect the internal
modem. Refer to the NAE Commissioning Guide (LIT-1201519) for information on setting up the
internal modem.
Note: The modem functionality of the MS-NAE35x1-x and MS-NAE45x1-x models is lost if you
upgrade these models to Release 9.0.7. Therefore, to retain modem operation, do not upgrade
these units.
Wiring the Network Engine
Mount the network engine securely before wiring the network engine. See the Mounting section.
NAE35/NAE45 Installation Guide6
CAUTION
Risk of Property Damage.
Do not apply power to the system before checking all wiring connections. Short circuited or improperly
connected wires may result in permanent damage to the equipment.
Attention
Risque de dégâts matériels.
Ne pas mettre le système sous tension avant d'avoir vérifié tous les raccords de câblage. Des fils
formant un court-circuit ou connectés de façon incorrecte risquent d'endommager irrémédiablement
l'équipement.
Warning
Risk of Electric Shock.
Disconnect or isolate all power supplies before making electrical connections. More than one
disconnection or isolation may be required to completely de-energize equipment. Contact with
components carrying hazardous voltage can cause electric shock and may result in severe personal
injury or death.
Warning
Risque de décharge électrique.
Débrancher ou isoler toute alimentation avant de réaliser un branchement électrique. Plusieurs
isolations et débranchements sont peut-être nécessaires pour -couper entièrement l'alimentation
de l'équipement. Tout contact avec des composants conducteurs de tensions dangereuses risque
d'entraîner une décharge électrique et de provoquer des blessures graves, voire mortelles.
Important: Do not apply 24 VAC power to the network engine before completing and checking
connections. Short circuits or improperly connected wires may result in permanent damage to
the equipment.
Important: Do not apply 24 VAC power to the network engine before installing the data
protection battery. See the section in this document.
Important: Use copper conductors only. Make all wiring in accordance with local, national,
and regional regulations.
Important: Use this MS-NxE35xx-x or MS-NAE45xx-x only as an operating control. Where
failure or malfunction of the NAE35/NAE45 could lead to personal injury or property damage
to the controlled equipment or other property, additional precautions must be designed
into the control system. Incorporate and maintain other devices, such as supervisory or
alarm systems or safety or limit controls, intended to warn of or protect against failure or
malfunction of the NAE35/NAE45.
7NAE35/NAE45 Installation Guide
Important: Utiliser ce MS-NxE35xx-x or MS-NAE45xx-x uniquement en tant que dispositif
de contrôle de fonctionnement. Lorsqu'une défaillance ou un dysfonctionnement du NAE35/
NAE45 risque de provoquer des blessures ou d'endommager l'équipement contrôlé ou un
autre équipement, la conception du système de contrôle doit intégrer des dispositifs de
protection supplémentaires. Veiller dans ce cas à intégrer de façon permanente d'autres
dispositifs, tels que des systèmes de supervision ou d'alarme, ou des dispositifs de sécurité ou
de limitation, ayant une fonction d'avertissement ou de protection en cas de défaillance ou de
dysfonctionnement du NAE35/NAE45.
Important: The network engine is a low-voltage (<30 VAC) device. Do not exceed the network
engine electrical ratings. Applying high voltage to the network engine may result in permanent
damage to the network engine and void any warranties.
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 network engine. Static electric
discharge can damage the network engine and void any warranties.
Be sure to follow these wiring guidelines:
• Route the supply power wires and communication cables at least 50 mm (2 in.) away from the
vent slots in the sides of the network engine housing.
• Provide slack in the wires and cables. Keep cables routed neatly around the network engine to
promote good ventilation, LED visibility, and ease of service.
• Ensure that the building automation network wiring meets the specifications, rules, and
guidelines as outlined in the Power supply, network, and bus connections section. The network
engine does not require an earth ground connection.
• Follow the transformer manufacturer’s instructions and the project installation drawings. Power
supply wire colors may be different on transformers not manufactured by Johnson Controls.
• While connecting network devices to 24 VAC power, make sure that transformer phasing is
uniform across all devices. Powering network devices with uniform 24 VAC supply power phasing
reduces noise, interference, and ground loop problems.
Wiring the NAE for N2, MS/TP, or Modbus RTU network
1. Connect the Ethernet cable to the RJ-45, 8-pin Ethernet port on the NAE shown in Figure 1.
2. Connect the field equipment cables to the appropriate ports as follows:
- 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).
- For Modbus RTU Protocol that uses the RS232C B serial port, use a cable to connect the
RS-232/RS-485 converter to the RS232C B serial port on the NAE. 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.
NAE35/NAE45 Installation Guide8
Figure 4: FC Bus terminal block and wiring connections
3. Wire from the RS-485 terminal on the converter to the RS-485 port on the vendor device (Figure
5). 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 5: Connection between converter and device
4. To add additional vendor devices, wire from one device to the next as shown in Figure
6. 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.
9NAE35/NAE45 Installation Guide
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