Carrier 48TC**16 installation instructions Communication Wiring Protocols, General

Page 39

Communication Wiring - Protocols

General —

Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different.

The RTU Open can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks. Switch 3 (SW3) on the board is used to set protocol and baud rate. Switches 1 and 2 (SW1 and SW2) are used to set the board’s network address. See Fig. 76 and 77 for protocol switch settings and address switches. The 3rd party connection to the RTU Open is through plug J19. See Fig. 78 for wiring.

NOTE: Power must be cycled after changing the SW1-3 switch settings.

Refer to the RTU Open Controller Integration Guide (Catalog No. 11-808-428-01) for more detailed information on protocols, 3rd party wiring, and networking.

SW3 Protocol Selection

PROTOCOL

DS8

DS7

DS6

DS5

DS4

DS3

DS2

DS1

 

 

 

 

 

 

 

 

 

BACnet MS/TP

Unused

OFF

OFF

OFF

ON

OFF

Select Baud

Select Baud

(Master)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Modbus

Unused

OFF

OFF

ON

ON

OFF

Select Baud

Select Baud

(Slave)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N2

Unused

OFF

OFF

OFF

ON

ON

OFF

OFF

(Slave)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LonWorks

Unused

ON

ON

OFF

ON

OFF

OFF

OFF

NOTE:

 

 

 

 

 

 

 

 

DS = Dip Switch

 

 

 

 

 

 

 

 

BACnet MS/TP SW3 example shown

Baud Rate Selections

BAUD RATE

DS2

 

DS1

 

 

 

 

 

 

 

 

9600

OFF

 

OFF

 

 

 

 

 

 

 

 

19,200

ON

 

OFF

 

 

 

 

 

 

 

 

38,400

OFF

 

ON

 

 

 

 

 

 

 

 

76,800

ON

 

ON

 

C07166

 

 

Fig. 76 - RTU Open SW3 Dip Switch Settings

 

 

 

48TC**16

C10815

Fig. 77 - RTU Open Address Switches

Fig. 78 - Network Wiring

C10816

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Contents Installation Instructions Personal Injury and Environmental Hazard Unit Operation and Safety HazardFIRE, Explosion Hazard Electrical Shock HazardUnit Dimensional Drawing 16 Size Unit Plan for Unit Location Service Clearance Dimensional DrawingPlan for Sequence of Unit Installation Inspect UnitProvide Unit Support Roof Curb Details Unit Damage Hazard Field Fabricate DuctworkRig and Place Unit Property Damage HazardPositioning on Curb Convert to Horizontal and Connect Ductwork when requiredInstall Outside Air Hood Economizer Hood Removal and Setup Factory OptionTwo Position Damper Hood Removal and Setup Factory Option Economizer Hood and Two-Position Hood Install Flue HoodInstall Gas Piping Natural Gas Supply Line Pressure RangesEquipment Damage Hazard Completing Installation of Thru-the-Base Option Fire or Explosion Hazard Install External Condensate Trap and LineMake Electrical Connections Field Power SupplyUnits with Factory-Installed Disconnect Units Without Factory-Installed DisconnectElectrical Operation Hazard Power Wiring Connections Convenience OutletsUnit Powered Convenience Outlet Wiring Thermostat Field Control WiringFactory-Option Thru-Base Connections Electrical Connections Units without Thru-Base ConnectionsTypical Low-Voltage Control Connections Unit without Thru-Base Connection KitTo connect the Thermidistat device 33CS2PPRH-01 Humidi-MiZerRControl ConnectionsHumidi-MiZer Space RH Controller To connect the Carrier humidistat HL38MG029OAT RRS Srtn PremierLink Controller PremierLinkt Factory OptionPremierLink Wiring Schematic PremierLink Wiring Schematic with Humidi-MiZerR PremierLink Sensor Usage Supply Air Temperature SAT SensorField Connections EconoMi$er2Thermostat Mode Space Sensor ModeSpace Sensors Configure the unit for Thermostat ModeIndoor Air Quality CO2 sensor Economizer ControlsUnit Performance Hazard To wire the sensorSmoke Detector/Fire Shutdown FSD Filter Status SwitchSupply Fan Status Switch Power Exhaust outputConnecting CCN Bus Color Code Recommendations CCN Communication BusRecommended Cables RTU Open Multi-Protocol Control Board RTU Open Control SystemRTU Open System Control Wiring Diagram RTU Open System Control Wiring Diagram with Humidi-MiZerR Type of I/O Connection PIN Name Numbers Dedicated Inputs RTU Open Controller Inputs and OutputsRTU Open T-55 Sensor Connections Space Temperature SPT SensorsRelative Humidity Sensors Space or Duct Mounted Space Relative Humidity Sensor Typical WiringConnecting Discrete Inputs Duct Relative Humidity Sensor Typical WiringGeneral Communication Wiring ProtocolsRTU Open Troubleshooting Local AccessReturn Air Enthalpy Sensor Outdoor Air Enthalpy Control PNO 33CSENTHSWLEDs Differential Enthalpy ControlSensor Module Smoke DetectorsSystem ControllerReturn Air with Economizer See Completing Installation of Return Air SmokeSmoke Detector Locations Supply AirReturn Air Detector Shipping Position Completing Installation of Return Air Smoke SensorBrkr Unit Wire/Fuse or Hacr Breaker Sizing DataPre-Start and Start-Up Adjust Factory-Installed OptionsInstall Accessories EconoMi$er IV Occupancy Switch48TC**16 14SI

48TC**16 specifications

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