Important: Read and save these instructions. This guide to be left with equipment.
2559106-D | 10 OCT 2014
LINKS XPS
MH
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your MHTC
Evaporative Media humidifier
Page 2
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
CYLINDER #
Thank you for choosing NORTEC.
Proprietary Notice
This document and the information disclosed herein are proprietary data of NORTEC HUMIDITY LTD. Neither
this document nor the information contained herein shall be reproduced used, or disclosed to others without
the written authorization of NORTEC HUMIDITY LTD., except to the extent required for installation or
maintenance of recipient’s equipment. All references to the NORTEC name should be taken as referring to
NORTEC HUMIDITY LTD.
Liability Notice
NORTEC does not accept any liability for installations of humidity equipment installed by unqualified personnel
or the use of parts/components/equipment that are not authorized or approved by NORTEC.
Copyright Notice
Copyright 2012, NORTEC HUMIDITY LTD. All rights reserved.
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Contents
3 Multi Unit Systems
4 Installing Links XPS into the Control Cabinet
4 Mounting the Links XPS Assembly
7 Internal Wiring Connections
15 Configuring the Humidifiers
17 Wiring
19 Gateway Configuration
21 Changing Baud Rate (BACnet MSTP, Johnson N2, LonWorks)
23 Changing the IP Address (BACnet IP)
27 Network Integration
30 BACnet Pics and Bibs
30 Variable Definition
43 Start-up Checklist
44 Troubleshooting
44 Indicator Lights
50 Wiring Diagrams
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Protocol
BACnet MS/TP
BACnet / IP
Johnson N2
LonWorks
The MHTC Nortec Links XPS Option allows for the integration of a MHTC Series humidifier within
a BACnet, Johnson N2 or LonWorks network. This option features a gateway that has the
capability of converting information from the host Modbus protocol to a specified secondary
protocol.
The following protocol options are available, and must be specified at time of order:
Table 1: Protocol Options
Multi-Unit Systems (“Master/Slave”)
Up to 8 humidifiers can be chained and monitored through a single Links XPS package. In this
configuration, the unit with the Links XPS package is designated the “Master Unit”, while the remaining 7 humidifiers are configured as “Slaves”. The master unit is connected to the
Building Management Systems (BMS). Each unit is separately addressed, it is possible to
monitor and control each unit individually.
Different networking configurations may be achieved depending on the type of network being
used. One networking example could have a Gateway installed inside the lead unit, which could
then be daisy-chained to successive units. In turn, the lead unit would connect to a Building
Management System (BMS) network via a shielded, twisted-pair connection. Please see wiring
section for additional detail. A second example could have a series of units directly connected
to an Ethernet network. This is only possible for BACnet communication and is essentially
referred to as a BACnet/IP configuration.
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Installing Links XPS into the Control Cabinet
If the Links XPS package was included with the original unit order, the necessary hardware will
have been factory mounted and wired into the MHTC control cabinet. In this case, please skip
ahead to the Wiring section for information on how to complete connections to the building
automation system.
If Links XPS is being retrofit, or added to an existing MHTC unit in the field, follow the steps
below prior to connecting wiring to the building automation system.
Mounting the Links XPS Assembly
Caution: Disconnect electrical power from humidifier before performing work inside control
cabinet.
Locate the MHTC control panel and turn the power switch to the off position. Ensure that the
power is also turned off at the breaker panel to prevent electrical shock. Open the control
cabinet by loosening the screws on the on right side of the cabinet and sliding the brass lock
clip out of the way.
MHTC ReFlow Models
1 Using the 4 plastic standoffs and plastic screws provided, attach the Links XPS module to
the steel back plate in the location shown in Figures 1and 2.
2 Secure the XPS transformer into the location shown in Figures 1 and 2. Use the two #6-32
thread cutting screws provided to secure the transformer in place.
3 Install the XPS Terminal strip onto the DIN rail at the bottom of the control cabinet as shown
in Figure 1. It may be necessary to remove one or both of the rail locks and shift the entire
control terminal strip over to accommodate the XPS terminal strip.
Note: The exact location the XPS transformer may vary depending on the revision of back plate.
Also, units produced before August 2011 may not have the holes for the XPS module and
transformer. These models will require new holes to be drilled during installation.
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Figure 1: Component Identification
Figure 2: Component Hole Location
Links XPS for MHTC| 4
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MHTC Flow Models:
1 On MHTC Flow models, Links XPS replaces the remote fault relay board. Remove the
remote fault relay board indicated in Figure 3 and disconnect the cable.
Underneath the remote fault relay board, the 4 holes for the XPS module and two holes for
the XPS transformer should be visible. Depending on the revision of the backplate these
holes may be in different configurations or may not be present at all. In the case of the
latter, drill 4x ¼” holes to accommodate the XPS module. Subsequently drill 2x 9/64” holes
to accommodate the XPS transformer.
2 Using the 4 plastic standoffs and plastic screws provided, attach the Links XPS module to
the steel back plate.
3 Secure the XPS transformer using the two #6-32 thread cutting screws.
4 Install the XPS Terminal strip onto the DIN rail at the bottom of the control cabinet as shown
in Figure 1. It may be necessary to remove one or both of the rail locks and shift the entire
control terminal strip over to accommodate the XPS terminal strip.
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Figure 3: MHTC Flow Control Cabinet
Links XPS for MHTC| 6
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Internal Wiring Connections
1 Connect the two black wires from the Links XPS transformer to the terminal 21 and 22 on
the MHTC control panel as shown in Figure 4. These wires are not polarity sensitive.
7 | Links XPS for MHTC
Figure 4: Transformer Power Connections
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2 Identify the Modbus and Building Automation System ends on the XPS module.
Figure 5: Communication Ports XPS Module
3 Connect the two white wires from the transformer to the power terminals on the Modbus end
of XPS module as shown in Figure 5. Also, connect one of the two short grey 3-wire cables into
the +, -, and GND terminals on the XPS module as shown in Figure 5.
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Figure 6: Links XPS Lonworks Module Terminals
4 Connect the other end of the short grey 3-wire cable from step 3 into the Net+, Net-, and
GND terminals on the DIN rail. The red cable should be connected to the Net + terminal, the
black to the Net - terminal, and grey/bare to the GND terminal. Refer to Figure 6.
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Figure 7: Communication Connections
5 Locate the long grey 3-wire cable with the RJ-45 plug on one end. Connect the wire end of
this cable into the Net+, Net -, and GND terminals used in step 4. The red cable should be
connected to the Net + terminal, the black to the Net - terminal, and grey/bare to the GND
terminal. These wires can either be “doubled up” with the cable from step 4 or installed on the
opposing side of the DIN rail. The cable, shown “doubled up”, is depicted in Figure 6.
Links XPS for MHTC | 10
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6 Connect RJ-45 end of the cable in step 6 into the port on the lower end of the processor
board. The processor board is mounted on the door of the control cabinet.
11 | Links XPS for MHTC
Figure 8: RJ45 Connection to Processor Board
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7 Locate the remaining short 3-wire cable. Connect this cable to the Building Automation
System end of the XPS module as shown in Figure 8 (N2, BACnet MSTP) or Figure 9 (LonWorks).
Lonworks is not polarity sensitive.
Note: BACnet IP packages do not require this step since they use the ethernet port on the XPS
module for communications.
Figure 9: Building Automation Connections (Johnson N2/ BACnet MS/TP)
Figure 10: Building Automation Connections (Lonworks)
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Wiring diagrams are provided below for reference.
13 | Links XPS for MHTC
Figure 11: Links XPS for MHTC with BACnet MSTP or N2
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Figure 12: Links XPS for MHTC with BACnet IP only
Links XPS for MHTC| 14
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15 | Links XPS for MHTC
Figure 13: Links XPS for MHTC with LonWorks
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Configuring the Humidifiers
The PCB processor board will need to be configured to work with the Links XPS modules.
Additionally, Nortec Links XPS can connect to a maximum of 8 units from a single Links XPS
gateway. If slave units are being used it is necessary to set the address of each slave module.
The address should be the number the nit will have on the networked chain.
Links XPS can be used for control, monitoring, or both. To set the control mode on the
humidifier, on the humidifier refer to the procedure on page 52 of the MH2 Installation and
Operation Manual to enter the controls menu.
If you would like to control the humidifier directly by signal writing values over the Links XPS
package set the Signal Source to Modbus. The humidifier will now look for values to be written
to the humidifier.
If you would like to use an analog control signal (from a wall stat or building automation system)
leave Signal Source setting to Analog and then set Hum. Control and Controlsign. to match the
type of controls being used. Ensure that controls are physically wired to terminals 3 and 4 on
the DIN rail terminal strip.
To set the humidifier to recognize the Links XPS package:
1 On the humidifier keypad, Press the menu button on the keypad and scroll to the User menu
using the arrow keys. Press Set to enter the User menu.
2 When prompted for a password, use the arrow keys to enter 8808 and press Set to confirm.
3 Scroll to the Modbus menu and press Set to enter the menu.
4 Set the Parity to None1.
5 Set the Modbus address of the lead unit to 1. Repeat this step for any slave humidifiers,
taking care to assign each slave unit a unique and sequential number. For example if the
lead is 1, subsequent units should be 2, 3, 4, etc.
Note: Ensure that no units share the same Modbus address.
6 Place the appropriate Unit Identifier label on each humidifier. These laps should match the
Modbus address for that humidifier and should be placed in a visible location.
7 Connect the slave humidifiers (if applicable) to the Nortec Links Module. A twisted pair cable
should be used so that the Net (+) terminal on the Links module should connect to the Net
(+) terminal on the slave unit (NHTC). The Net (–) terminal on the module should be
connected to the Net (–) terminal on the slave unit. Refer to the Links XPS wiring diagram for
more information.
Links XPS for MHTC | 16
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8 Ensure shield wiring matches the following pattern if distances between humidifiers is
significant (2200 ft):
Figure 14: Multiple Slave Humidifiers
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Protocol
Signal
Type
Polarity
Recommended
Cable
Maximum
Recommended Distance
from Nortec Module
A
B
BACnet MS/TP
EIA-485,
2-wire
Net +
Net -
18-24 AWG
Shielded, Twisted
Pair
120 Impedance
2300 ft at 9.6 kbps
2000 ft at 38.4 kbps
Johnson N2
LonWorks
FTT-10, 2-
wire
Tx Rx
18-24 AWG
Twisted Pair
120 Impedance
Should not exceed 50 ft.
BACnet/IP
LAN
standard
N/A
N/A
CAT.5E cable with
RJ-45 termination
Depends on cable
manufacturer
Wiring
BACnet MS/TP, Johnson N2, and LonWorks
Links XPS is pre-installed and factory wired. Connections must be made between the master
humidifier and the BMS, and the master humidifier and any slaves that may be present.
Up to 8 units (1 master, 7 slaves) may be connected to a BMS through a single gateway in the
master unit. The units are daisy chained via the Links XPS terminal strip. The wire shield
should only be connected at one end per pair of units when “daisy chaining”.
Table 2 refers to the recommended wire types and maximum recommended lengths from the
Nortec Links XPS module to the Building Management system. Communication between the
humidifiers and Nortec Links XPS will occur via a EIA-485 signal type. Nortec recommends using
a 18-24 AWG shielded, 120 twisted pair wire between the lead humidifier and each of the
slave humidifiers. Total cable length runs between the Nortec Links XPS module and the
furthest slave humidifier should not exceed 2,000 feet. Signal boosters or repeaters may be
necessary for longer wire runs or where electrical noise interference is prevalent.
Table 2: Recommended Wire Types and Lengths
Links XPS for MHTC| 18
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BACnet/IP
A standard CAT-5E cable with an RJ-45 (Ethernet) jack is to be connected to the Ethernet port
on the Links XPS module. Refer to wiring diagrams in this manual.
Cable Shielding
The cable’s shield should be connected to the shield terminal at the BMS system only, and not
the Links XPS module.
As well the cable shield should be connected at the lead unit only and not at subsequent units.
For long chains the shield would appear as:
Unit 2 to Master - Shield connected at master only.
Unit 3 to Unit 2 - Shield connected at unit 2 only.
Unit 4 to Unit 3 - Shield connected at unit 3 only.
And so forth.
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Gateway Configuration
Protocol configuration is completed at the factory, prior to final testing. If configuration
information was supplied at the time of order, the units will be configured for plug-and-play
installation with no further configuration required. If this information was unavailable, it will be
necessary to configure the addressing parameters.
BACnet IP systems will require a static IP address to communicate on the network, and may
require a device instance and MAC address
BACnet MS/TP and Johnson N2 systems require both a device instance, MAC address and
a baud rate to be set.
LonWorks systems automatically detect network address parameters and do not require
configuration.
Changing BACnet Device Instance and BACnet MAC Address
The initial step is to determine if both BACnet Device Instance and MAC address can be the
same value. If not, skip to Part B. If yes, continue with Part A using solely the small dipswitches.
Part A: Device Instance and MAC address same value
The device instance and BACnet MAC address can be easily changed to the same value using
the dip switches (SW3 Bank 1 through 8) highlighted on figure 10. Notice these are the smaller
dipswitches, not the larger ones.
Figure 15: Dip Switches for BACnet Address Changes
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Figure 16: Respective Address and Baudrate Dipswitches
These switches allow you to set a binary value for the device instance between 1 and 127
inclusively. To set the device instance to a value outside of this range, skip to PART B.
21 | Links XPS for MHTC
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Switch
A8
A7
A6
A5
A4
A3
A2
A1
Setting
Off
On
Off
Off
On
On
On
Off
Binary 0 1 0 0 1 1 1 0
Exponential Meaning
27 x 0
26 x 1
25 x 0
24 x 0
23 x 1
22 x 1
21 x 1
20 x 0
Simplified Meaning
128 x 0
64 x 1
32 x 0
16 x 0
8 x 1
4 x 1
2 x 1
1 x 0
Numerical Meaning
0
64 0 0 8 4 2 0
Result
64 + 8 + 4 + 2 = 78
Value
A8
A7
A6
A5
A4
A3
A2
A1
0 (cannot be used)
Off
Off
Off
Off
Off
Off
Off
Off
1
Off
Off
Off
Off
Off
Off
Off
On
10
Off
Off
Off
Off
On
Off
On
Off
25
Off
Off
Off
On
On
Off
Off
On
40
Off
Off
On
Off
On
Off
Off
Off
50
Off
Off
On
On
Off
Off
On
Off
75
Off
On
Off
Off
On
Off
On
On
78
Off
On
Off
Off
On
On
On
Off
100
Off
On
On
Off
Off
Off
On
Off
125
Off
On
On
On
On
On
Off
On
127
Off
On
On
On
On
On
On
On
The methodology for converting numbers to binary is presented in the example below. In this
example, a value of 78 is converted to binary and set as the device instance:
Table 3: Converting Numbers to Binary
When adjusting switches be sure to adjust only the switches highlighted in the box in Table 3
above. Also, switches may be presented in reverse order (compared with the table below) on
the physical hardware itself. Take care when adjusting switches to ensure the settings are
entered as intended. Common settings are tabulated below:
Table 4: Common Settings
Links XPS for MHTC| 22
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Setting
B4
B3
B2
B1
110
Off
Off
Off
On
300
Off
Off
On
Off
600
Off
Off
On
On
1200
Off
On
Off
Off
2400
Off
On
Off
On
4800
Off
On
On
Off
9600
Off
On
On
On
19200
On
Off
Off
Off
20833
On
Off
Off
On
28800
On
Off
On
Off
38400
On
Off
On
On
57600
On
On
Off
Off
76800
On
On
Off
On
115200
On
On
On
Off
After an address change has been made, the Links XPS module must be power cycled for the
change to take effect. The module may take up to 60 seconds to restart after a power cycle.
Changing Baud Rate (BACnet MSTP, Johnson N2, LonWorks)
The baud rate for communications must be changed through dipswitches (SW4 Bank, 1 through
4). Refer to figure 16 for location of the dipswitch.
By adjusting the settings according to the table 5, the baud rate can be changed. The Baud rate
must be set to exactly the same baud rate as your Building Management System.
Communication performance varies with building automation system manufacturer and some
experimentation with other baud rates may be required to obtain the best performance.
Table 5: Common Settings
After an address change has been made, the Links XPS module must be power cycled for the
change to take effect. The module may take up to 60 seconds to restart after a power cycle.
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Figure 17: Retrieval of Protocessor Software Tool
Part B: Device Instance and MAC address different values
First, ensure the addressing dipswitches (mentioned in Part A) for Bank SW3 are all set to OFF
or are set to 128 or higher. Also ensure your Baud rate dipswitches are properly set (Bank SW4)
see previous chapter for details.
The device instance and BACnet MAC address can now be changed to be different values using
a free software tool. To obtain this program, visit the link below, and then download and install
the latest version of the “Utility Software” (8 MB file called Install.zip).
Once the free tool has been downloaded to a computer (preferably a laptop), extract and install
it. NOTE: you will require administrative privileges on the computer to perform the installation,
contact your network administrator for assistance. Once completed, use the following steps to
perform the addressing changes:
To change the Device Instance and MAC Address:
1. Connect the computer to the ethernet port of the Links XPS module. (you will need a
Category 5 or better cable (CAT5)
2. Power up the Links XPS module. During the boot process 8 multi-colored LED’s may
illuminate.
3.On the computer navigate to Start > Programs > Fieldserver Utilities > Remote User
Interface.
4.A blue window will launch, running a program named “Remote User Interface”. Any Links
XPS models detected will be listed as “Fieldservers discovered on the network”. If no
modules are detected you will receive the following screen:
Figure 18: Screen for No Modules Detected
This error is most likely due to the network configuration of the computer. By default, the Links
XPS modules ship with an address of 192.168.10.11. If your computer is not already on the
192.168.10.0 domain, you will need to set your computer IP address to a unique address within
this range. You may need to turn off or disable any wireless connections before beginning to
avoid conflicts. For Windows systems, this setting is located in:
25 | Links XPS for MHTC
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Windows XP: Start > Control Panel > Network Connections
Windows Vista, 7: Start > Control Panel > Network and Sharing Center Windows 8.1: Desktop Start (right click) > Control Panel > Network and Sharing Center
Select your Ethernet or Local Area Connection, right click, and select Properties. In the Window
that pops up, locate the Internet Protocol (TCP/IPv4) and click it to highlight it. Next click the
Properties button. Take note of your existing settings as will need to re-enter them later, then
enter the settings below: ( IP= 192.168.10.99, subnet=255.255.255.0,
gateway=192.168.10.1)
Figure 19: Internet Protocol Properties Screen
Click OK on both of the open windows, and your connection will reset with the new settings.
After about 30 seconds, it will be ready to use.
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When the Remote User Interface successfully detects a Links Module you should see a screen
similar to below:
Figure 20: Remote User Interface Successfully Detects Links XPS Module
When the device has been detected and appears in the list, press the number listed to the left
of it (usually 1) to select it. This will bring up a prompt to reset the time. Type Y to continue, you
will next be greeted with the main menu.
27 | Links XPS for MHTC
Figure 21: Main Menu Screen
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Figure 22: Retrieving the Configuration File
Figure 23: Retrieval Complete
From the Main Menu, type U for Upload. You will be prompted with the following screen:
Type U once more to initiate retrieval of the configuration file.
Links XPS for MHTC | 28
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Figure 24: Changing The MAC Address
Once transfer is complete you may type N which automatically opens the retrieved file into
Notepad . Note: file is named config.csv and is located in configuration File Folder
(Start>Programs>Fieldserver Utitlities>Configuration File Folder). Do not open the file in
Microsoft Excel, you may accidentally corrupt it.
Once the configuration file is open in Notepad, you will have to change addressing at two
locations.
Modifying MAC address:
Use the Ctrl and F key to bring up the find command. Type in the find command, the words
“common information”. The following screen should appear:
Below the words Common Information, you will see the number 11, this is the default MAC
address, change as desired. Note: MAC address must be between 1-254 Inclusive.
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Figure 25: Changing the Device Instance
Modifying Device Instance:
Once again, use the Ctrl and F key to bring up the find command. Type in the find command, the
words “server side nodes”. The following screen should appear:
Below the words Server Side Nodes, you will see the number 11, this is the default Device
Instance, change as desired. Note: Device Instance must be between 1-16’777’215 Inclusive.
Once complete, save the notepad file and close it. Return to the Remote User Interface program
and press Esc until you return to the Main Menu
Links XPS for MHTC | 30
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Figure 26: Returning the Configuration File Back to Links XPS module
Type D for download, you will be prompted with the following screen:
Type D once more to return the configuration file back to the Links XPS module. Once download
is completed, you can type the “Esc” key until you return to the main menu. Next select ! (Hold
the Shift key and press the 1 key simultaneously) to restart the module causing the changes to
take effect.
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Figure 27: Restarting the XPS Module
Figure 28: Awaiting Reboot of the XPS Module
The following screen will appear:
Links XPS for MHTC | 32
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Press the Esc key to return to the discovery screen. The screen will remain in discovery mode
until the Links XPS module has successfully completed the reboot. Once reboot complete, you
may disconnect your laptop from the Links XPS module and verify that your BMS can discover
the humidifier.
Changing the IP Address (BACnet IP)
The IP address of the module can also be configured for BACnet IP networks. To configure the
IP address, a freely downloadable configuration program is required as mentioned in the
previous chapter.
To change the IP Address:
1. Connect the computer to the ethernet port of the Links XPS module.
2. Power up the module. During the boot process 8 multi-colored LED’s will illuminate and
remain steady. The module is ready when most of these LED’s have turned off.
3. On the computer navigate to Start > Programs > Fieldserver Utilities > Remote User
Interface.
4. A blue window will launch, any Links XPS models detected will be listed as “Fieldservers
discovered on the network”. If no modules are detected you will receive the following
screen:
Figure 29: Screen for No Modules Detected
This error is most likely due to the network configuration of the computer. By default, the Links
XPS modules ship with an address of 192.168.10.11. If your computer is not already on the
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192.168.10.0 domain, you will need to set your computer IP address to a unique address within
this range. You may need to turn off or disable any wireless connections before beginning to
avoid conflicts. For Windows systems, this setting is located in:
Windows XP: Start > Control Panel > Network Connections
Windows Vista, 7: Start > Control Panel > Network and Sharing Center Windows 8.1: Desktop Start (right click) > Control Panel > Network and Sharing Center
Select your Ethernet or Local Area Connection, right click, and select Properties. In the Window
that pops up, locate the Internet Protocol (TCP/IPv4) and click it to highlight it. Next click the
Properties button. Take note of your existing settings as will need to renter them later, then
enter the settings below: ( IP= 192.168.10.99, subnet=255.255.255.0,
gateway=192.168.10.1)
Figure 30: Internet Protocol Properties Screen
Click OK on both of the open windows, and your connection will reset with the new settings.
After about 30 seconds, it will be ready to use.
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When Remote User Interface successfully detects a Links Module you should see a screen
similar to below:
Figure 31: XPS Module Detected
35 | Links XPS for MHTC
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When the device has been detected and appears in the list, press the number listed to the left
of it (usually 1) to select it. This will bring up the main menu.
Figure 32: Main Menu
Press I to change the IP address. This will bring up the IP address settings.
Figure 33: Changing IP Address
Links XPS for MHTC | 36
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To edit the IP address, press the 1 key, type in the desired address, and then press Enter once.
Repeat the process for the Netmask (selection 2), and the Gateway (selection 3). For most
reliable performance, activating DHCP is not recommended.
When the IP address change is completed press Esc to return to the main menu. Next select !
(Hold the Shift key and press the 1 key simultaneously) to restart the module causing the
changes to take effect.
Figure 34: Restarting XPS Module
Press any key to exit this screen. The module will reboot and may take up to 1 minute to fully
restart. If you changed the IP address significantly, the module may no longer be reachable with
your IP address settings resulting in the same error described in step 4
To rectify this, change your IP address to a unique address in the same domain as the one you
entered for the Fieldserver by following the instructions in step 4. Once communication has
been re-established, you can quickly verify the change was successful by noting the address
displayed under “Fieldservers discovered on the network”.
When completed, be sure to restore your existing IP address settings for your computer
following the instructions in step 4 and substituting the settings you had noted originally.
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Network Integration
LonWorks.xif file
To facilitate the integration of a LonWorks unit within a network, it may be desirable to obtain an
External Interface File (XIF). Files of type .xif are used to convey the resources, specific objects
and data types which a LonWorks device possesses. The .xif file allows a network integrator to
simulate the presence of a networked humidifier even if it is not yet physically connected to the
network. In fact, if the integrator has the .xif files of all network devices, a complete system
could be simulated and configured off-line. Once the configuration is done, the integrator's
software tool can be connected to the actual system and the configuration information can be
downloaded.
Retrieving XIF File Instructions
The XIF file can be retrieved directly from the Links XPS Module. A Windows based laptop and
an Ethernet cable are required for this process.
This process requires the “Remote User Interface” tool from Protocessor described earlier in
this manual. It is available by visiting www.protocessor.com/tech-support/utilities-and-design-
documents.phpand download and install the “Utility” software.
Once this software has been installed, follow the following procedure:
1. Locate desired MASTER humidifier that contains the Links package. Ensure unit is powered
on and remove the panel on the RIGHT side of the humidifier. Locate the Links package
inside of the unit.
2. For LINKS XPS packages (gateway device on its own), connect the CAT5 cable directly into
the Ethernet port on the gateway.
3. Connect other end of CAT5 cable to the Ethernet port on the laptop.
4. Run the “Remote User Interface” utility by double clicking the shortcut on your desktop (or
Start>Programs>Fieldserver Utilities>Remote User Interface)
5. The program should automatically recognize connected humidifier and bring you to the
“Main Menu”. If it does not, contact Nortec Technical Services at the number on the back
cover of this manual.
6. Type “u” for upload.
7. Type “o” for other. (A warning will appear, press any key to continue.)
8. Type “r” for remote.
9. Enter “fserver.xif”’ and hit the ‘enter’ key.
10. Type “u” to initiate upload from the gateway to the laptop.
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11. The .xif file will be saved in the folder “Configuration File Folder” located at
13. Locate file in Configuration File Folder and change name to corresponding humidifier, (ex,
“fserverH1.xif” for Humidifier 1)
14. Repeat this procedure for all Master humidifiers changing the name of the .xif once saved
to correspond with the tag of the appropriate humidifier.
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In the variable name, “_x” denotes the humidifier number. If there is only one humidifier, all variable
names will end in “_1”. If two units are networked together, see Figure 4, the second unit’s variable names
will end in “_2”. For 3 networked units, “_3” and so on. If unsure of the unit number, each unit will have a
label, in the electrical compartment close to the terminal strip, indicating the device instance of each
humidifier.
BACnet Pics and Bibs
The Protocol Implementation Conformance Statement or “PICS” describes the BACnet
capabilities of a particular BACnet implementation. It is a written document, created by the
manufacturer of a device, which identifies the particular options specified by BACnet that are
implemented in the device.
BACnet Interoperability Building Blocks (BIBBs) describe a list of services a BACnet device
provides. The main areas that the building blocks are concerned with include: data sharing,
trends, schedules, device and system management. BIBBs help specify the interoperability
capabilities of a BACnet device. Please contact the factory to obtain a PICS statement or BIBBs
profile.
Variable Definition
Nortec Links XPS is capable of communicating a variety of variables for each unit that is
connected to it. For a variable listing and definition refer to Table 6. Network variable addresses
for the humidifiers may be seen in Table 7 to Table 14.
Writes channel 1 demand or %RH. Allows BAS control of output.
(0 - 100%). Unit must be configured to accept network demand.
Example: 500 = 50%, 1000=100%
nvoRHDem1_x
R
Analog Value
Reads channel 1 demand or %RH. Allows BAS control of output.
(0 - 100%). Unit must be configured to accept network demand.
Example: 500 = 50%, 1000=100%
nviSet1_x
W
Analog Value
Writes setpoint when humidifier is operating on
sensor/transducer controls. Acceptable values are 10 - 90 %.
Example: 500 = 50%, 900=90%
nvoSet1_x
R
Analog Value
Reads setpoint when humidifier is operating on
sensor/transducer controls. Acceptable values are 10 - 90 %.
Example: 500 = 50%, 900=90%
nviDisable_x
W
Binary Value
Allows for remote disable of humidifier.
0 = Run
1 = Disable
nvoDisable_x
R
Binary Value
Checks remote disable status.
0 = Run
1 = Disable
nviNetSensor_x
W
Binary Value
Configures unit to look for either hardwired controls or control
value written from building automation system.
0 = Hard wired controls
1 = Network controls
nvoNetSensor_x
R
Binary Value
Checks current control source.
0 = Hard Wired
1 = Network
nvoFault_x
R
Binary Value
Reads fault status.
0 = Normal operation
1 = Unit Fault
nvoSecurity_x
R
Binary Value
Checks status of security loop (on/off controls wired in series
between terminals 1 and 2 on the low voltage terminal strip).
Humidifier will only operate if loop is closed.
0 = Open
1 = Closed
nvoService_x
R
Binary Value
Checks service light status.
0 = Normal operation
1 = Service required, check humidifier display for information.
nviHum_Control_x
W
Analog Value
Change control type that humidifier is accepting.
Warning: Check physical control type before modifying.
0 = Demand signal
1 = On/Off signal
2 = Transducer (sensed %RH), humidifier uses proportional
algorithm
3 = Transducer (sensed %RH), humidifier uses proportionalintegral algorithm
Table 6: Variable Definitions
41 | Links XPS for MHTC
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Variable Name
R=Read
W=Write
Description
nvoHum_Control_x
R
Analog Value
Read control mode status.
0 = Demand Signal
1 = On/Off signal
2 = Sensed RH signal, humidifier used proportional algorithm
3 = Sensed RH signal, humidifier uses proportional-integral
algorithm
nvoServTime_x
R
Analog Value
Indicates operation hours.
nvoPumpRunHr_x
R
Analog Value
Indicates total run hours of pump since manufacture.
nvoUVRunHr_x
R
Analog Value
Indicates total run hours of UV since last reset.
nvoStage1Dem_x
R
Binary Value
Indicates if stage 1 is actively humidifying.
1 = On
2 = Off
nvoStage2Dem_x
R
Binary Value
Indicates if stage 2 is actively humidifying.
1 = On
2 = Off
nvoStage3Dem_x
R
Binary Value
Indicates if stage 3 is actively humidifying.
1 = On
2 = Off
nvoWarning_x
R
Binary Value
Indicates that a warning is present on the humidifier. Check
humidifier display for warning information.
1 = Warning
0 = No Warning
nvoCleaning_x
R
Binary Value
Indicates that a cleaning cycle is active.
1 = Clean Cycle Active
0 = Inactive
nvoTankDrain_x
R
Binary Value
Indicates that tank drain is active.
1 = Drain Cycle Active
0 = Inactive
nvoTankLevel_x
R
Binary Value
Indicates Tank Water Level.
1 = Full Water
0 = Below Full
Table 6: Variable Definitions - CONTINUED
Links XPS for MHTC| 42
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Unit #1
BACnet
Lonworks
N2
Variable Name
Type
Instance
SNVT
SNVT #
NV Index
Type
Instance
nvoServTime_1
AV 1 SNVT_lev_count_f
55
1
Ana_Output
1
nvoPumpRunHr_1
AV 2 SNVT_lev_count_f
55
2
Ana_Output
2
nvoUVRunHr_1
AV 3 SNVT_lev_count_f
55
3
Ana_Output
3
nvoSet1_1
AV 4 SNVT_lev_count_f
55
4
Ana_Output
4
nvoHum_Control_1
AV 5 SNVT_lev_count_f
55
5
Ana_Output
5
nvoCapLimit_1
AV 6 SNVT_lev_count_f
55
6
Ana_Output
6
nvoRHDem1_1
AV 7 SNVT_lev_count_f
55
7
Ana_Output
7
nviSet1_1
AV 8 SNVT_lev_count_f
55
8
Ana_Output
8
nviRHDem1_1
AV 9 SNVT_lev_count_f
55
9
Ana_Output
9
nviHum_Control_1
AV
10
SNVT_lev_count_f
55
10
Ana_Output
10
nviCapLimit_1
AV
11
SNVT_lev_count_f
55
11
Ana_Output
11
nvoNetSensor_1
BV 1 SNVT_switch
95
12
Dig_Output
1
nvoDisable_1
BV 2 SNVT_switch
95
13
Dig_Output
2
nvoStage1Dem_1
BV 3 SNVT_switch
95
14
Dig_Output
3
nvoStage2Dem_1
BV 4 SNVT_switch
95
15
Dig_Output
4
nvoStage3Dem_1
BV 5 SNVT_switch
95
16
Dig_Output
5
nvoWarning_1
BV 6 SNVT_switch
95
17
Dig_Output
6
nvoService_1
BV 7 SNVT_switch
95
18
Dig_Output
7
nvoFault_1
BV 8 SNVT_switch
95
19
Dig_Output
8
nvoCleaning_1
BV 9 SNVT_switch
95
20
Dig_Output
9
nvoTankDrain_1
BV
10
SNVT_switch
95
21
Dig_Output
10
nvoSecurity_1
BV
11
SNVT_switch
95
22
Dig_Output
11
nvoTankLevel_1
BV
12
SNVT_switch
95
23
Dig_Output
12
nviNetSensor_1
BV
13
SNVT_switch
95
24
Dig_Output
13
nviDisable_1
BV
14
SNVT_switch
95
25
Dig_Output
14
Table 7: Humidifier Variable Addresses – Unit #1
MHTC Links XPS Variable Listing and Default Settings
Default BACnet/IP Address: 192.168.10.11; Subnet: 255.255.255.0
Default BACnet/MSTP: MAC Address = 11, Device Instance = 11
Default Johnson N2 Address: 11
Sensed %RH Feedback with Duct High-Limit Sensing (0-
10V Signal Directly to Humidifier)
52 | Links XPS for NHTC
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Humidifier-to-Humidifier Connection:
Each individual humidifier linked to lead unit.
Connection must be daisy-chained from the lead unit to the end unit, with shield
wire connected only on the lead unit.
Check that each humidifier has a unique modbus address.
BMS Network Connection:
Lead unit wired to BMS system (Twisted Pair or Ethernet).
Network activity verified.
Shields should be connected at BMS end only.
Controls Wired:
Directly to humidifiers or through BMS network.
Ensure power is being supplied to the humidifier, NORTEC Links Module. For
BACnet/IP adjust network IP settings. (If this information is provided, factory will
perform necessary IP assignment).
After power-up, verify network communication.
Map desired network variables to BMS.
Verify variable operation after mapping is complete.
Perform regular humidifier start-up check.
Nortec Links XPS Start-up Checklist
Wiring
Start-up Procedure
54 | Links XPS for NHTC
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Figure 318: XPS BACnet Module LED
Troubleshooting
When troubleshooting the communication process for Links XPS modules should be kept in
mind. Humidifier data is received by the NORTEC Links module using the modbus rtu protocol
over the serial port connection. The Links module then translates the data to the desired
protocol for connection over the networks.
Indicator Lights
There is a variety of status LEDs on the Links XPS module to aid in the diagnosis of
communication problems. Please refer to the following figures for locations and meaning
Links XPS for NHTC | 55
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Figure 39: XPS LonWorks Module LED
56 | Links XPS for NHTC
Figure 320: Ethernet Port LED
Page 60
LED Name
Color
Function
Module Power
Off
Indicates that the Links module is not
receiving power.
Green
Indicates the Links module is operating
normally.
Receive LED (marked as Rx on
processor board)
Flashing Green
Indicates that the Links module is receiving a
network packet from a serial connection.
Transmit LED (marked as Tx on
processor board)
Flashing Green
Indicates that the Links module is transmitting
a network packet on a serial connection.
Ethernet LINK
Off
Indicates no Ethernet connection is present.
Solid Yellow
Indicates an Ethernet connection has been
detected.
Ethernet Activity
Off
No Ethernet network activity.
Flashing Green
Indicates Ethernet activity.
Table 15: Links XPS Module Diagnostic LEDs
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Problem
Solution
The BMS network cannot read/write any
information to any of the networked
humidifiers
Verify that the network connection is made and is connected
properly.
Verify that the correct network settings are being used. The
Links XPS module may need to be restarted to load the new
settings.
Check the Serial Port Activity LED on the Nortec Links module to
ensure proper communication from the humidifiers to the Links
XPS module.
Check the Ethernet port activity on the Links XPS module to
ensure it is receiving data.
Check the transmit and receive status LEDs to determine if
there is any network traffic being sent or being received by the
Links XPS module from the BMS network
Verify proper connections to networked humidifiers.
Turn the Links XPS module off for several seconds then switch it
back on to reload the control program. Allow for some time for
the network variables to be polled.
The BMS network can see some of the
networked humidifiers but not others.
Ensure network variables are mapped correctly to the BMS.
Ensure proper connections to the humidifiers.
Disconnect all of the humidifiers from the Links XPS package
except for the unit that is not responding to the network. Turn
the Links XPS package off and then back on. Check if the
humidifier can now be seen by the BMS
The BMS network receives information
from the networked humidifier(s) but the
information is mismatched or the
humidifier responds un-expectedly
Verify that the network variables have been mapped to the BMS
network correctly. It is possible that the variables have been
cross-linked during the network integration process.
Connect humidifiers one at a time and test units individually.
After sending the humidifier a networkbased demand signal the unit powers
down after several minutes. The
nviNetSensor variable is switched on and
a value has been set for the nviRHDem1
variable.
When a BMS network demand/RH signal is being used the
network must refresh the nviRHDem signal at least every 5
minutes otherwise the humidifier will revert to a 0 demand state.
This is a safety precaution in case the BMS network connection
is lost.
Nortec Humidity Inc. and/or Nortec Humidity Ltd. (hereinafter collectively referred to as THE
COMPANY), warrant for a period of two years after installation or 30 months from
manufacturer’s ship date, whichever date is earlier, that THE COMPANY’s manufactured and
assembled products, not otherwise expressly warranted, are free from defects in material and
workmanship. No warranty is made against corrosion, deterioration, or suitability of substituted
materials used as a result of compliance with government regulations.
THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing
replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the defective
part(s) is returned freight prepaid by the customer. Parts used for repairs are warranted for the
balance of the term of the warranty on the original humidifier or 90 days, whichever is longer.
The warranties set forth herein are in lieu of all other warranties expressed or implied by law. No
liability whatsoever shall be attached to THE COMPANY until said products have been paid for in
full and then said liability shall be limited to the original purchase price for the product. Any
further warranty must be in writing, signed by an officer of THE COMPANY.
THE COMPANY’s limited warranty on accessories, not of the companies manufacture, such as
controls, humidistats, pumps, etc. is limited to the warranty of the original equipment
manufacturer from date of original shipment of humidifier.
THE COMPANY makes no warranty and assumes no liability unless the equipment is installed in
strict accordance with a copy of the catalog and installation manual in effect at the date of
purchase and by a contractor approved by THE COMPANY to install such equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for consequential
damage or damage resulting directly from misapplication, incorrect sizing or lack of proper
maintenance of the equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for damage resulting
from freezing of the humidifier, supply lines, drain lines, or steam distribution systems.
THE COMPANY makes no warranty and assumes no liability whatsoever for equipment that has
failed due to ambient conditions when installed in locations having climates below 14°F (10°C) during January or above 104°F (40°C) during July.
THE COMPANY retains the right to change the design, specification and performance criteria of
its products without notice or obligation.