Table of Contents
Advertisement
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 Links 2 module to the Building Management system. Communication between the
humidifiers and Nortec Links 2 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 2 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.
Protocol
BACnet MS/TP
Johnson N2
LonWorks
BACnet/IP
2 | Installation
Table 2: Recommended Wire Types and Lengths
Polarity
Signal
Type
A
B
EIA-485,
Net +
Net -
2-wire
Tx
Rx
EIA-232,
2-wire
LAN
N/A
N/A
standard
Maximum Recommended
Recommended
Distance from NORTEC
Cable
18-24 AWG
Shielded, Twisted
Pair
2000 ft at 38.4 kbps
120
Impedance
18-24 AWG
Should not exceed 50 ft.
Twisted Pair
120
Impedance
CAT.5E cable with
RJ-45 termination
Module
2300 ft at 9.6 kbps
Depends on cable
manufacturer
Advertisement
Table of Contents
