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Carrier 11-808-427-01 Binary outputs , Analog output , To wire inputs and outputs

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Installation

14 RTU Open

Binary outputs

The RTU Open has 8 binary outputs. You can connect each output to a maximum of 24 Vac/Vdc. Each output

is a dry contact rated at 3 A, 24 V maximum, and is normally open.

To size output wiring, consider the following:

• Total loop distance from the power supply to the controller, and then to the controlled device

NOTE Include the total distance of actual wire. For 2-conductor wires, this is twice the cable length.

• Acceptable voltage drop in the wire from the controller to the controlled device

• Resistance (Ohms) of the chosen wire gauge

• Maximum current (Amps) the controlled device requires to operate

Analog output

The RTU Open has 1 analog output that supports voltage or current devices. The controlled device must share

the same ground as the controller and have input impedance of 500 Ohms maximum for the 4-20 mA mode

on AO - 1.

To wire inputs and outputs

1 Turn off the RTU Open's power.

2 Connect the input wiring to the screw terminals on the RTU Open.

3 Turn on the RTU Open's power.

4 Set the appropriate jumpers on the RTU Open.

AO - 1

J3 0 - 10 Vdc/4-20 mA

Battery Jumper

W1

In (Do not remove)

Format Jumper*

W2 Out

Input 11 mA Jumper

W3 Out (mA not utilized on this channel)

Input 11 Thermistor

W4 In (default position)

Input 10 mA Jumper

W5 Out (mA not utilized on this channel)

Input 10 Thermistor Jumper

W6 In (default position)

*Formatting the controller may result in lost information and should only be done under the guidance of

Carrier Control Systems Support.

Contents

Main Page Table of Contents Page Page Page What is the RTU Open controller? Introduction Page Specifications Safety considerations Field-supplied hardware Installation To mount the RTU Open To wire the controller for power Using the rooftop equipment control power transformer Using an auxiliary control power transformer To set the RTU Open's address To set the RTU Open's communications protocol and baud rate Wiring the RTU Open to the MS/TP network Wiring specifications To wire the controller to the network Wiring inputs and outputs Input wiring specifications Inputs Binary outputs Analog output To wire inputs and outputs J3 W1 J4 Inputs J5 Inputs J11 Outputs NOTE NOTE J20 Analog Inputs 10 and 11 are reserved for a 10k Ohm space temperature sensor with an Wiring sensors to inputs Field-supplied sensor hardware Wiring an SPT sensor Rnet wiring speci ficati ons To wire the SPT sensor to the controll er Wiring a Supply Air Temperature sensor Wiring specifications To wire the SAT sensor to the c ontroller Wiring a Duct Air Temperature sensor Wiring specifications To wire a duct sensor to the controller Wiring an Outdoor Air Temperature sensor Wiring specifications To wire an OAT sensor to the controller Wiring a CO2 sensor Wiring specifications To wire the CO2 sensor to the controll er Wiring an Outdoor Air Quality sensor Wiring specifications To wire the OAQ se nsor to the controller Wiring a Relative Humidity sensor Wiring specifications To wire the RH sensor to the controll er Wiring a Humidistat Wiring specifications To wire a humidis ta t to the controller Wiring an enthalpy switch Wiring specifications To wire an enthalpy sw itch (outdoor air) to the controller To wire an enthalpy sw itch (differential) to the controller Wiring a status switch To wire a status switch to the controller Wiring a compressor safety Wiring specifications To wire a compress or safety input to the c ontroller Wiring an occupancy switch or door contact Wiring specifications To wire an occupancy switch or door contact Start-up Service Test Configuring the RTU Open's properties Unit Configuration properties Page Setpoint properties Service Configuration properties Page Occupancy Sequence of Operation Supply fan Cooling Economizer Power Exhaust Unoccupied Free Cooling Optimal Start To change Optimal Start settings: Enthalpy control Indoor Air CO2 Heating Heat Pump operation Dehumidification Demand Limit Door switch Remote occupancy Fire Shutdown Compressor Safety Fan Status Filter Status Alarms Page Page Linkage Linkage Air Source Modes Serial number Troubleshooting LED's Replacing the RTU Open's battery FCC Compliance Compliance CE Compliance BACnet Compliance Status Appendix A: RTU Open Points/Properties Unit Configuration Page Setpoints Page Page Page Alarm Configuration Service Configuration Page Maintenance Page Alarms Linkage I/O Points Page Single Point Linkage Appendix B: Single Point Linkage and Device Address Binding Device Address Binding B Index C D F I R S T W