Nortec Industries NHTC Series installation manual Wiring, Recommended Wire Types and Lengths

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(2)WIRING

(A)BACNET/MSTP, JOHNSON N2, AND LONWORKS

(1)The necessary internal wiring for the Gateway is already present except for the BMS network connection that can be made via twisted-pair at terminals A and B. To network multiple units to a single Gateway, the units may be daisy-chained to each other using the network link terminals at the TB3 connection jack on the humidifier logic board. Refer to wiring diagram in section 10-50.

(1)Table #1 refers to the recommended wire types and maximum recommended lengths from the Nortec LINK 2 module to the front-end of the Building Management system. Since communication between the humidifiers and Nortec Links will always occur via a EIA-485 signal type, Nortec recommends using a 18-24 AWG shielded, twisted pair wire between the lead humidifier and each of the slave humidifiers. Cable 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.

Table 1. Recommended Wire Types and Lengths

 

Signal

Polarity

Recommended

Maximum

Protocol

 

 

Recommended

 

 

Type

A

B

Cable

Distance from Nortec

 

 

 

 

 

 

Module

 

 

 

 

 

 

BACnet

EIA-485,

Net +

Net -

18-24 AWG

2300 ft at 9.600 kbps

MS/TP

Shielded, Twisted

2-wire

2000 ft at 38,400 kbps

Johnson N2

 

 

Pair

 

 

 

 

BACnet/IP

LAN

N/A

N/A

CAT.5E cable with

Depends on cable

standard

RJ-45 termination

manufacturer

 

 

 

LonWorks

EIA-232,

Tx

Rx

18-24 AWG

Should not exceed 50 ft.

2-wire

 

 

Twisted Pair

 

 

 

 

 

(B)BACNET/IP

(1)The necessary wiring for the Gateway is present except for the network cable, which must be connected to the RJ-45 (Ethernet) jack on the Gateway. Refer to wiring diagram in section 10-50.

10-10

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Contents Nhtc Nortec Links 2 Options Manual No. H-502Proprietary Notice Liability Notice 2008-02-18Table of Contents List of Figures This page Intentionally Left Blank Introduction 10-00Overview Protocol OptionsInstallation 10-10Networking Wiring Recommended Wire Types and LengthsNetwork Integration Gateway ConfigurationBaud Rates Variable Definition Unit must be configured for Networked demand Variable Definitions10-10 Humidifier Variable Addresses Unit #1 Snvt Snvt #Humidifier Variable Addresses Unit #2 Humidifier Variable Addresses Unit #3 Humidifier Variable Addresses Unit #4 Humidifier Variable Addresses Unit #5 Humidifier Variable Addresses Unit #6 Humidifier Variable Addresses Unit #7 Humidifier Variable Addresses Unit #8 Nhtc 10-10 This page Intentionally Left Blank START-UP 10-20Nortec Links 2 START-UP Checklist START-UP ProcedureTroubleshooting 10-30Troubleshooting Indicator LightsOnLine Diagnostic LED Locations OnLine Diagnostic LED Description LED Name Color FunctionLinks 2 Module Diagnostic LEDs Troubleshooting Communication Problems ProblemSpare Parts 10-40Replacement Parts BACnet or N2 Module Ethernet Switch Technical 10-50Net + To Units 2 toNet + Shield-+ Net Net This page Intentionally Left Blank Warranty Authorized Agent