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LINKS 2
NHRS/DI/SC
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your NHTC Nortec
Links2 Options.
Important: Read and save these instructions. This guide to be left with equipment.
2538480-C | 21 FEB 2012
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.
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.
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
Contents
1 Installation
1 Overview
1 Bracket Installation
2 Retrofit Insallation of a NHRS
Links 2 Package
3 Mount the Links 2 Assembly
4 Wiring the Nortec Links 2 Module
9 Multi-Unit Systems (Master /
Slave)
9 Wiring
11 Network Integration
12 Retrieving XIF File Instructions
15 Variable Definition
26 Startup Check List
27 Troubleshooting
27 Indicator Lights
32 Replacement Parts
36 Wiring Diagrams
Installation | 1
Overview
The NHRS Nortec Links2 Option allows for the integration of a NHRS Series humidifier within a
BACnet, Johnson N2 or LonWorks network and allows those units to be concurrently monitored via
the Nortec OnLine interface. This option features a Nortec OnLine module co-existing with 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
Protocol
BACnet MS/TP
BACnet / IP
Johnson N2
LonWorks
The Nortec Links2 package also includes Nortec OnLine. Nortec OnLine is an advanced web
monitoring package that allows authorized users to remotely monitor humidifier status and
performance from anywhere with an internet connection. Nortec OnLine is available with an
optional service that, among other things, includes factory technicians monitoring the units
weekly. Even if the OnLine service is not ordered, the units can still be connected to an viewed
online at www.norteconline.com For information specifically related to Nortec OnLine consult the
accompanying OnLine manual or your local representative.
Bracket Installation
Links2 can be factory installed inside of the humidifier if the package is included at time of order.
If this is the case, skip ahead through his section.
Links2 can also be retrofit to existing units. The following section explains how to install the
Links2 bracket inside of the humidifier.
2 | Installation
Retrofit Installation of a NHRS Links2 Package
BACNET, LONWORKS And N2 Modules:
Figure 1. Component Identification
LAN Router
or Switch
OnLine
Module
LINKS 2
Module
Router Power
Supply
Installation | 3
Mount The Links2 Assembly
The Nortec Links2 assembly mounts on the top, right corner of the electrical compartment.
Ensure that the rear, upwards facing hook engages the proper cooling louver at the back of the
humidifier cabinet.
1. Fasten the bracket assembly to the humidifier ‘top’ using the 3 8-32 X ½” self-tapping screws
provided with the kit.
Figure 2. Hook Position
Figure 3. Assembly Mounting Location
Hook
Position
Screw
Locations
4 | Installation
Wiring The Nortec Links2 Module
Most of the wiring connections for the new Nortec Links2 module will have already been finished
at the factory, however, there is an additional Logic Card that must be installed. Refer the LINKs 2
wiring diagram included in the package for added details.
Module Power Connections
There will be a wire harness provided that will consist of a red and blue wire. Both red and blue
wires are terminated ring terminals. Cut the terminals off and strip off 1/8” insulation on the end.
1. The red wire is to be connected to the left side of contact #1 (24v) on the main terminal strip.
The blue wire is to be connected to the left side of contact #3 (ground) on the main terminal
strip.
Figure 4. Humidifier Main Terminal Strip
Installation | 5
Humidifier Communication Connection
1. Locate the main PCB board inside the humidifier
2. Connect the 10 pin end of ribbon cable to the COM port.
Figure 5. COM Port
3. Route the ribbon cable through the punch out on the humidifiers front electrical panel
Figure 6. Routing Ribbon Cable
6 | Installation
4. Connect the ribbon cable 20 pin side to the Logic Card.
Figure 7. 20 Pin connection for Ribbon Cable
5. Configured dipswitch settings according to MODE1 printed on card (485<>TTL)
Figure 8. Dipswitch settings for Logic Card
20 pin connection
Installation | 7
6. Route the RJ-11 cable through the same punch out as the ribbon cable and connect it to the
corresponding jack on the logic card
Figure 9. RJ-11 Jack Location on Logic Card
7. Mount logic card with nylon standoffs and screws to humidifier using the 4 pre-drilled holes
Figure 10. Pre Drilled Holes for Logic Card
8 | Installation
Configuring The Humidifiers
1. Since Nortec Links2 can connect to a maximum of 8 units, it will be necessary to set the unit
address for each humidifier. The lead unit can be determined by the presence of the Links
module. The slave humidifiers can be given a unit address according to the number the unit
will have on the networked chain.
2. To access the menu settings, press the Up and Down arrows at the same time
3. Scroll up or down to find the Modbus heading
4. Set the appropriate Modbus address according to the unit ordering.
5. Place the appropriate Unit Identifier label on each humidifier. These labels should be placed
on the unit where the electrical control punch-outs are located at the top of the humidifier.
6. 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 Links2 module should connect to the Net
(+) terminal on the slave unit. The Net (–) terminal on the module should be connected to the
Net (–) terminal on the slave unit. Refer to the Links2 wiring diagram for more information.
7. Ensure shield wiring matches the following pattern if distance between humidifiers is
significant:
Installation | 9
Multi-Unit Systems (“Master/Slave”)
Up to 8 humidifiers can be chained and monitored through a single Links2 package. In this
configuration, the unit with the Links2 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.
Wiring
BACnet MS/TP, Johnson N2, and LonWorks
Links 2 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.
Connections to the BMS are through terminals A and B on the Links 2 terminal strip for BACnet
MS/TP, Johnson N2, and LonWorks. The shields should also be connected. Refer to the wiring
diagrams in this manual.
Table 2 refers to the recommended wire types and maximum recommended lengths from the
Nortec Links2 module to the Building Management system. Communication between the
humidifiers and Nortec Links2 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 Links2 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
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
2000 ft
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
10 | Installation
BACnet/IP
A standard CAT-5E cable with an RJ-45 (Ethernet) jack is to be connected to port 3,4, or 5 on the
gateway. 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 2 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.
Gateway Configuration
Links2 is configured for each protocol at the factory, prior to final testing. Baud rates are adjusted
to the following values by default:
Table 3: Baud Rates
Protocol
Default Baud Rates
BACnet MS/TP
38.4 kbps
BACnet / IP
10BaseT
Johnson N2
9.6 kbps
LonWorks
38.4 kbps
Links2 packages require network addresses in order to communicate with a BMS system. In most
cases addresses information is factory configured during final testing. If the humidifiers were
ordered before BMS address information was available, Links2 would be figured to a default
address. Please contact the factory for the configuration tools to allow field modification of the
address parameters.
Installation | 11
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.
12 | Installation
Retrieving XIF File instructions
The XIF file can be retrieved directly from the Links package. A Windows based laptop and an
Ethernet cable are required for this process. This process requires the “Remote User Interface”
tool from Fieldserver. It is available by visiting http://fieldserver.com/techsupport/utility/utility.php and
downloading 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 Links2 packages (with the blue ZONET router), connect one end of the CAT5 cable to the
router in an available port (ports 3 or 4 should be free) NOTE: Do NOT plug into the “WAN”
port.
3. Connect other end of CAT5 cable to the Ethernet port on the laptop.
Installation | 13
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.
11. The .xif file will be saved in the folder “Configuration File Folder” located at
Start>Programs>Fieldserver Utilities>Configuration File Folder.
12. Type ‘q’ twice to exit out of the program
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.
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.
Nortec OnLine
Firewall Port 5222 must be open to TCP traffic in order for NORTEC OnLine to communicate
properly.
14 | Installation
Variable Definition
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.
Nortec Links2 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 4. Network variable addresses for the
humidifiers may be seen in Table 5 to Table 12.
Installation | 15
Table 4: Variable Definitions
Variable Name
Description
Type
Range
Unit
R/W
Details
nviRHDem_x
Write RH or
Demand signal value
to humidifier
Analog
Value
0 - 100
%
Write
Requires network controls
(nviNetSensor = 1)
nviSet_x
Writes the desired
space setpoint when
using sensor controls
Analog
Value
30 - 95
%
Write
Use only when sending RH
value to RHDem
nviCapLimit_x
Set a manual
capacity restriction
for the humidifier
Analog
Value
50 - 100
%
Write
Limits output to percentage
of total capacity
nvoRHDem_x
Read RH or Demand
signal value from
humidifier
Analog
Value
0 - 100
%
Read
Used with hardwired or
network control signal
nvoSet_x
Read space setpoint
(sensor type controls
only)
Analog
Value
30 - 95
%
Read
Sensor controls only, not for
demand type controls
nvoCapLimit_x
Reads the manual
capacity restriction
for humidifier
Analog
Value
50 - 100
%
Read
Adjust using writeable
nviCapLimit variable
nvoSysDemand_x
Read system ouput /
demand
Analog
Value
0 - 100
%
Read
Displays output as
percentage of capacity
nvoHourOpt_x
Read operation
hours of unit
Analog
Value
0 -
Infinity
hrs
Read
Displays cumulative hours
since startup
nvoSmallHrs_x
Read minor
maintenance hours
remaining
Analog
Value
0 - 6000
hrs
Read
Displays hours until next
minor maintenance
nvoLargeHrs_x
Read major
maintenance hours
remaining
Analog
Value
0 - 6000
hrs
Read
Displays hours until next
major maintenance
nviNetSensor_x
Switches between
hard wired or
network control
signal
Binary Value
0,1
-
Write
1 = Use Modbus to write
sensor or demand value
0 = Hard wired sensor or
wired demand signal
nvoNetSensor_x
Confirms humidifier
control mode
Binary Value
0,1
-
Read
1 = Use Modbus to write
sensor or demand value
0 = Hard wired sensor or
wired demand signal
nvoStatus_x
Read humidification
status
Binary Value
0,1
-
Read
0 = Idle / Standby
1 = Active / Humidifying
nvoService_x
Read service warning
status
Binary Value
0,1
-
Read
0 = No Service Warning
1 = Service Required
nvoFault_x
Read fault status
Binary Value
0,1
-
Read
0 = No Fault
1 = Fault Detected
nvoInputType_x
Read control signal
mode
Binary Value
0,1
-
Read
0 = Demand Signal
1 = RH Sensor Signal
("Transducer Control")
nvoConnection_x
Read communication
status
Binary Value
0,1
-
Read
0 = Communication Error
1 = Normal Communications
16 | Installation
Table 5: Humidifier Variable Addresses
BACnet
LonWorks
N2
Variables
Data
Type
Object
ID
SNVT Type
SNVT
Index
Data Type
Address
Unit 1 Variable Name
nviRHDem_1
AV
1
SNVT_lev_percent
1
Analog Output
1
nviSet_1
AV
2
SNVT_lev_percent
2
Analog Output
2
nviCapLimit_1
AV
3
SNVT_lev_percent
3
Analog Output
3
Not Used
AV
4
SNVT_lev_percent
4
Analog Output
4
Not Used
AV
5
SNVT_lev_percent
5
Analog Output
5
nvoRHDem_1
AV
6
SNVT_lev_percent
6
Analog Input
6
nvoSet_1
AV
7
SNVT_lev_percent
7
Analog Input
7
nvoCapLimit_1
AV
8
SNVT_time_hour
8
Analog Input
8
nvoSysDemand_1
AV
9
SNVT_time_hour
9
Analog Input
9
nvoHourOpt_1
AV
10
SNVT_time_hour
10
Analog Input
10
nvoSmallHrs_1
AV
11
SNVT_time_hour
11
Analog Input
11
nvoLargeHrs_1
AV
12
SNVT_lev_percent
12
Analog Input
12
Not Used
AV
13
SNVT_lev_percent
13
Analog Input
13
Not Used
AV
14
SNVT_lev_percent
14
Analog Input
14
Not Used
AV
15
SNVT_lev_percent
15
Analog Input
15
nviNetSensor_1
BV
1
SNVT_switch
16
Digital Output
1
Not Used
BV
2
SNVT_switch
17
Digital Output
2
Not Used
BV
3
SNVT_switch
18
Digital Output
3
nvoNetSensor_1
BV
4
SNVT_switch
19
Digital Input
4
nvoStatus_1
BV
5
SNVT_switch
20
Digital Input
5
nvoService_1
BV
6
SNVT_switch
21
Digital Input
6
nvoFault_1
BV
7
SNVT_switch
22
Digital Input
7
nvoInputType_1
BV
8
SNVT_switch
23
Digital Input
8
nvoConnection_1
BV
9
SNVT_switch
24
Digital Input
9
Not Used
BV
10
SNVT_switch
25
Digital Input
10
Not Used
BV
11
SNVT_switch
26
Digital Input
11
Not Used
BV
12
SNVT_switch
27
Digital Input
12
Not Used
BV
13
SNVT_switch
28
Digital Input
13
Not Used
BV
14
SNVT_switch
29
Digital Input
14
Not Used
BV
15
SNVT_switch
30
Digital Input
15
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