Nortec LINKS 2 GSTC User Manual
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2531037-E | 21 FEB 2012
LINKS 2
GSTC / SETC
B+ Models
Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your GSTC/SETC B+
Nortec Links2 Options.
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
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.
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
Overview
Protocol
BACnet MS/TP
BACnet / IP
Johnson N2
LonWorks
The GS/SE Nortec Links2 Option allows for the integration of a GSTC or SETC Series humidifier
within a BACnet, Johnson N2 or LonWorks network and allows those units to concurrently be
monitored via the Nortec OnLine interface. This option features a Nortec OnLine module coexisting 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
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 this section.
Links2 can also be retrofit to existing units. The following section explains how to install the
Links2 bracket inside of the humidifier.
Installation| 1
Retrofit Installation Of A SETC-50 Nortec Links 2 Package
Step 1 - Installation
Mount the Links2 remote package in a convenient location. Note that the remote package does
not need to be mounted in close proximity to the humidifier, however, the CAT5 cable with RJ-45
connection must reach the humidifiers connection on the keybad PCB.
Figure 1: Remote Package
2 | Installation
Figure 2: Humidifier Keypad/Front of PCB
RJ-45 connected
Figure 3: Rear of PCB
Connect power to the 24VAC and GND terminals of the Links2 terminal strip. This may be done in
one of two ways:
1. A 120VAC to 24VAC plug-in transformer with screw terminals on the secondary side has been
supplied with this kit. Wire the transformer to the 24VAC and GND terminals on the Links2
terminal strip.
2. Connect power from the humidifier terminal strip (see wiring diagram for details).
3. Note on 2(b) - Power to Links2 module will be lost when the humidifier is switched off.
4. 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 first pin
(bottom-most pin) of the connector. The Net – terminal on the module should be connected to
the second pin of the connector. Refer to the unit’s wiring diagram for more information.
Step 2 – Configuring The Humidifiers
Note: If the Links2 remote package was shipped with the humidifiers, this step will have already
been performed by the factory.
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 Links2
module. The slave humidifiers can be given a unit address according to the number the unit
will have on the networked chain.
2. In order to change the current modbus address, press the Menu button on the keypad. When
prompted, enter the code 0335.
3. Once the password is set select the modbus address heading and press enter. Use the up and
down arrows to change the address setting.
4. Determine the desired humidifier ordering on the network. To change the network instance
follow step 3 and enter the parameter value of 2 for unit 2, 3 for unit 3 and so on.
Installation| 3
Retrofit Installation Of A GSTC/SETC Nortec Links2 Package
Figure 1. Bracket Placement and Screw Locations
Figure 2. Detailed View of 5th Screw
5th screw
BACNET, LONWORKS And N2 Modules:
Mounting The Links2 Assembly
Install the bracket assembly using 8-32x ½” hex-drive screws. Notice, 4 screws are used for the
hinges, and the 5th screw for fastening the bracket in place.
4 | Installation
Wiring The Nortec Links2 Module
Figure 3. Component Identification
LAN
Router or
OnLine
LINKS 2
Router
CAT5 cable
Red and
blue wires
Most of the wiring connections for the new Nortec Links2 module will have already been finished at
the factory, however, there are a few connections that will need to be made to connect the unit the
GS/SE series humidifier. Refer the Links2 wiring diagram included in the package for 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 with a ring terminal.
1. The ring terminal of the red wire is to be connected to the power terminal on the 24V side of the
transformer located at the bottom, left of the electrical compartment.
2. The ring terminal of the blue wire is to be connected to the ground terminal on the 24V side of the
transformer.
Humidifier Communication Connection: On the Nortec LINKS 2 assembly there will be a CAT5 cable
with RJ45 connector.
1. This connector is to be plugged into the jack on the bottom right side of the humidifier main PCB
board.
Installation| 5
Configuring The Humidifiers
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.
1. Press the Menu button on the keypad and enter the code 0335.
2. Select Control Settings
3. Select Modbus Paramaters.
4. Set the communication parity to None.
5. Set the appropriate Modbus address according to the unit ordering
6. 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.
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 first pin
(bottom-most pin) of the connector. The Net (–) terminal on the module should be connected to
the second pin of the connector. Refer to the unit’s wiring diagram for more information.
8. Ensure shield wiring matches the following pattern if distances between humidifiers is significant.
6 | Installation
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.
Installation| 7
Figure 1: Sample Network with Nortec Links 2
Figure 2: For BACnet IP only
GS/SE (1) GS/SE (2) GS/SE (3)
GS/SE (1) GS/SE (2) GS/SE (3)
8 | Installation
Wiring
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
2000 ft at 9,600 bps
2000 ft at 38,400 kbps
Johnson N2
BACnet/IP
LAN standard
N/A
N/A
CAT.5E cable with RJ-
45 termination
Depends on cable
manufacturer
LonWorks
FTT-10,
2-wire
Tx
Rx
18-24 AWG
Twisted Pair
Should not exceed 50 ft.
BACnet MS/TP, Johnson N2, and LonWorks
Links2 is pre-installed and factory wired, except for the SETC-050 which is provided in its own
separate enclosure. Connections must be made between the master humidifier and the Building
Management System (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 / Online terminal strip. The wire shield
should only be connected at one end per pair of units when “daisy chaining”. Older A and B style
units use a different connection method, please refer to revision C of this manual.
Table 2 refers to the recommended wire types and maximum recommended lengths from the
Nortec Links2 module to the front-end of the Building Management System. Since communication
between the humidifiers and Nortec Links 2 occurs 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
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.
Installation| 9
Gateway Configuration
Protocol
Default Baud Rates
BACnet MS/TP
38.4 kbps
BACnet / IP
10BaseT
Johnson N2
9.6 kbps
LonWorks
38.4 kbps
Protocol configuration is made at the factory, prior to final testing. Baud rates are adjusted to the
following values by default.
Table 3: Baud Rates
For BACnet/IP, BACnet/MSTP and Johnson N2 applications, it is necessary to establish the
modules network address parameters in order access it. Address assignments can be configured
at the factory or Nortec can provide instructions to modify the address settings in the field.
LonWorks networks can automatically detect network address parameters and do not need
further configuration.
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.
10 | 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.
For LINKS XPS packages (gateway device on its own), connect the CAT5 cable directly into the
Ethernet port on the gateway.
Installation| 11
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