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Carrier 48TC**16 Communication Wiring - Protocols, General, RTU Open SW3 Dip Switch Settings

Models: 48TC**16

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Communication Wiring - Protocols

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)	Unused	OFF	OFF	OFF	ON	OFF	Select Baud	Select Baud
	(Master)

	Modbus	Unused	OFF	OFF	ON	ON	OFF	Select Baud	Select Baud
	(Slave)	Unused	OFF	OFF	ON	ON	OFF	Select Baud	Select Baud
	(Slave)

	N2	Unused	OFF	OFF	OFF	ON	ON	OFF	OFF
	(Slave)	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			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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Carrier 48TC**16 Communication Wiring - Protocols, General, RTU Open SW3 Dip Switch Settings, RTU Open Address Switches

Contents

Single Package Rooftop TABLE OF CONTENTSInstallation Instructions 48TC**16FIRE, EXPLOSION HAZARD SAFETY CONSIDERATIONSUNIT OPERATION AND SAFETY HAZARD 48TC**16Horizontal Connections / Economizer Fig. 1 - Unit Dimensional Drawing – 16 Size Unit48TC**16 Vertical Connections / EconomizerJobsite Survey INSTALLATIONFig. 2 - Service Clearance Dimensional Drawing Step 1 — Plan for Unit LocationPad-mountedinstallation — Step 2 - Plan for Sequence of Unit InstallationTable 1 – Operating Weights Curb-mountedinstallation —Fig. 3 - Roof Curb Details 48TC**16C10772 PROPERTY DAMAGE HAZARD Step 5 — Field Fabricate DuctworkStep 6 — Rig and Place Unit Fig. 4 - Unit Leveling Tolerances48TC**16 Fig. 6 - Retrofit Installation DimensionsPositioning on Curb — Fig. 8 - Horizontal Conversion PanelsFactory Option Step 8 — Install Outside Air HoodEconomizer Hood Removal and Setup Fig. 9 - Typical Access Panel LocationsEconomizer Hood and Two-PositionHood — Step 9 — Install Flue HoodFig. 12 - Indoor Coil Access Panel Relocation Fig. 14 - Economizer Filter InstallationEQUIPMENT DAMAGE HAZARD Step 10 — Install Gas PipingFig. 16 - Gas Piping Guide Table 2 – Natural Gas Supply Line Pressure RangesFig. 21 - Gas Piping OptionFig. 20 - Gas Piping Fig. 19 - Gas Line PipingFIRE OR EXPLOSION HAZARD Fig. 23 - Orifice HoleFig. 24 - Condensate Drain Pan Side View Fig. 25 - Condensate Drain Piping Details Field Power Supply —Step 12 — Make Electrical Connections Fig. 26 - Conduit into Factory Option DisconnectFig. 29 - Mounting Position for Field Disconnects Fig. 30 - Disconnect Switch and UnitUnits Without Factory-InstalledDisconnect — Units with Factory-InstalledDisconnect —Fig. 33 - Convenience Outlet Utilization Notice Fig. 31 - Power Wiring ConnectionsConvenience Outlets — ELECTRICAL OPERATION HAZARD48TC**16 Fig. 34 - Unit Powered Convenience Outlet WiringFig. 35 - Weatherproof Cover Installation ELECTRICAL OPERATION HAZARDFig. 36 - Thru-the-BaseOption, Shipping Position Field Control WiringFactory-Option Thru-BaseConnections Electrical Connections—Fig. 38 - Typical Low-VoltageControl Connections Fig. 39 - Thermostat Wire RoutingHeat Anticipator Settings — Unit without Thru-BaseConnection Kit —To connect the Carrier humidistat HL38MG029 Fig. 40 - Accessory Field-InstalledHumidistatHumidi-MiZerR Control Connections Humidi-MiZer- Space RH Controller48TC**16 with EDGE Pro Thermidistat DevicePremierLinkt Factory Option Fig. 44 - PremierLink Controller48TC**16 Fig. 46 - PremierLink Wiring Schematic 48TC**16C11202 C11203 48TC**16EconoMi$er2 — Supply Air Temperature SAT Sensor —Outdoor Air Temperature OAT Sensor — Field ConnectionsINPUT SIGNAL Table 4 - Space Sensor ModeTable 5 – Thermostat Mode INPUT SIGNALFig. 52 - PremierLink T-56Sensor Fig. 49 - T-55Space Temperature Sensor WiringConfigure the unit for Thermostat Mode — Space Sensors —Fig. 55 - Indoor CO2 Sensor 33ZCSENCO2 33ZCSENCO2 - Typical Wiring DiagramEconomizer Controls Indoor Air Quality CO2 sensor —TB3-13 To wire the sensorTB3-7 BLACKFig. 61 - PremierLink Wiring Fan Pressure Switch Filter Status SwitchFig. 60 - PremierLink Filter Switch Connection Supply Fan Status SwitchTable 7 – Color Code Recommendations Connecting CCN BusCCN Communication Bus — Table 6 – Recommended CablesRTU Open Control System Fig. 65 - RTU Open Multi-ProtocolControl Board48TC**16 Fig. 67 - RTU Open System Control Wiring Diagram 48TC**16C11204 C11205 48TC**16Field Connections Table 8 – RTU Open Controller Inputs and OutputsSupply Air Temperature SAT Sensor — Outdoor Air Temperature OAT Sensor —Fig. 70 - RTU Open T-56Sensor Connections Space Temperature SPT SensorsFig. 71 - Space Temperature Sensor Typical Wiring Fig. 69 - RTU Open T-55Sensor ConnectionsFig. 73 - RTU Open / Outdoor CO2 Sensor Humidi-MiZerR Control Wiring In units equippedFig. 72 - RTU Open / Indoor CO2 Sensor 33ZCSENCO2 Connections Outdoor Air Quality SensorConnecting Discrete Inputs — 48TC**16Smoke Detector/Fire Shutdown FSD — Fig. 78 - Network Wiring Communication Wiring - ProtocolsFig. 76 - RTU Open SW3 Dip Switch Settings Fig. 77 - RTU Open Address SwitchesP5 P5 Local AccessRTU Open Troubleshooting — P1 P1Differential Enthalpy Control — WiringOutdoor Air Enthalpy Control PNO 33CSENTHSW Table 9 – LEDsController — Fig. 81 - Controller AssemblySmoke Detectors System —Location See “Completing Installation of Return Air SmokeSmoke Detector Locations Supply Air48TC**16 Fig. 85 - Return Air Detector Shipping PositionFig. 86 - Return Air Sensor Operating Position Additional Application Data48TC**16 Legend and Notes for TableEconoMi$er IV Occupancy Switch — Step 13 — Adjust Factory-InstalledOptionsStep 14 — Install Accessories Fig. 87 - EconoMi$ert IV Wiring48TC**16 Replaces: 48TC 48TC**1614SI Catalog No: 48TC