Honeywell T755U Humidity, Pressure, and Universal Sensor Wiring

T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER

562-0255—09

Fig. 3. Parallel-series wiring of sensors.

Temperature Sensor Wire Type and Size

Temperature sensors use standard AWG 18/2 unshielded

wire. For cable runs greater than 25 feet or where

electrical interference may be a problem, shielded cable is

recommended. See Fig. 4.

Refer to “Temperature Sensor Calibration” on page11 for

wire size selection where cable runs are longer than

25 feet.

Fig. 4. Sensor Wiring — 2-wire shielded cable connection from Sensor A to temperature sensor.

Humidity, Pressure, and Universal Sensor Wiring

Sensors with a 0-5 Vdc, 0-10Vdc or 4-20mA input to the

T775U must be wired to the Sensor A terminal. Sensor B

is used only as a temperature input.

Sensors use standard AWG 18 unshielded wire. For cable

runs greater than 25 feet, shielded cable is

recommended.

The sensors in Fig. 5 – 8 beginning on page 6 are

examples and illustrate voltage and current wiring for 3-

wire and 2-wire sensors to the Sensor A terminal. For

terminal wiring details, see Fig. 11 and Table2 on page 8.

Other sensors are supported. See sensor descriptions on

page2.

NOTES:

1. Other transmitters can be wired in the same

manner. For example, the 0-10Vdc wiring

shown in Fig.5 on page 6 with the H76XX

sensor can also be done with the P7640 or

any other transmitter.

2. The T775U V terminal outputs 18 Vdc.

TO T775 CONNECTIONS (SENSOR A) OR (SENSOR B).

SENSORS

M24548

M24549A

SENSORS A AND B ARE POLARITY INSENSITIVE WHEN USING A 1097 OHM PTC TEMPERATURE SENSOR.

SENSOR B IS USED ONLY IN RESET APPLICATIONS ON THE T775U20006.

1

SHIELDED

CABLE

SHIELDED

CABLE

SENSOR

NOTE: SHIELDED CABLE MUST BE

CONNECTED TO A SEPARATE EARTH

GROUND.

HOWEVER, DO NOT GROUND

SHIELDED CABLE AT SENSOR END.

NOTE: TO MINIMIZE NOISE PICKUP,

MAKE SENSOR CONNECTION FROM

SHIELDED CABLE AS CLOSE AS

POSSIBLE TO SENSOR BODY.

T

T

T

T

SENSOR A

SENSOR B

1

2

2

Contents

Main INSTALLATION INSTRUCTIONS 62-0255-09 T775U Series 2000 Electronic Stand-Alone Controller PRODUCT DESCRIPTION Temperature Sensorsa (Sensor A or B) Differential Pressure Sensors Humidity Sensors CO2 Sensors Universal Sensors BEFORE INSTALLATION When Installing This Product INSTALLATION AND SETUP MOUNTING Controller Mounting WIRING Wiring Connections Access Temperature Sensor Wiring Reset Temperature Control Multiple Parallel Temperature Sensors Humidity, Pressure, and Universal Sensor Wiring T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER C S VS + Controller Wiring WARNING Controller Wiring Method W Controller Wiring Details T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER WIRING APPLICATION EXAMPLES LOAD 2 COM Fig. 15. Wiring for Two-stage Control with 240 Vac. Fig. 12. Wiring for Two-stage Control 24 Vac Input and 24 Vac Load. WARNING Power Loss Humidity, Pressure, and Universal Sensor Calibration Temperature Sensor Calibration INTERFACE OVERVIEW Using the LCD Panel Interface Home Button Menu Button Left and Right Arrow Buttons (t and u) Up and Down Arrow Buttons (p and q) PROGRAMMING OVERVIEW Setpoint and Differential Setpoint High Limit Programming the T775U Controller 1. SETUP Setup Procedure 1.1. Entering Setup Mode 1.2. Setting up the Sensors 1.2.1. Number of SENSORS 1.2.2. SENSOR A 1.2.2.1. TYPE 1.2.2.2.1. UNITS [1097 PTC)] 1.2.2.2.2. UNITS 4-20mA) 1.2.2.2.3. MIN or MAX VALUE 0.0 0.0 1.2.2.3. CALIBRATE 0.0 1.2.2.5. Exit Sensor A Setup 1.2.3. SENSOR B (Temperature only) 1.3. Setting up the Outputs 1.3.1. Setting up the Modulating Outputs 1.3.1.1. TYPE (of output signal) 1.3.1.2. MIN OUT % 1.3.1.3. INTEGRAL 1.3.1.4. DERIVATIVE 1.3.1.5. SCHEDULE 1.3.1.6. RESET 1.3.1.7. Hide 1.3.1.7. Exit Modulating Outputs Setup 1.3.2. NBR OF RELAYS 1.3.3. OPTIONS 1.3.3.1. USE SCHED 1.3.3.2. MIN OFF or MIN ON 1.3.3.3. DI OPTIONS (digital input options) 1.3.3.4. SHOW RT (show run time hours) 1.3.3.5. Exit Options Setup 1.3.4. Setting up the Relays 1.3.4.1. SCHEDULE 1.3.4.2. RESET 1.3.4.3. RESET RT (run time) 1.3.4.4. EXIT Relay Setup 2. PROGRAMMING OUTPUTS (MOD AND RELAY) WITH NO RESET 2.1. Entering Program Mode 2.1.1. Program Menu for Outputs with No Reset 2.1.2. SETPOINT 2.1.3. SETBACK 2.1.3. SENSOR 2.1.5. THROTTLING RANGE or DIFFERENTIAL 2.1.6. ACTION 2.2. Program Next Output Output or Relay) 3. PROGRAMMING OUTPUTS (MOD AND RELAY) WITH RESET 3.1. Setting Up the Controller for Reset Determining and Setting the Reset Value s Reset Example: Setback (optional) Example: 3.2. Program Menus for Outputs with Reset 20 3.2.1. SP MAX A1 or BOILER MAX 3.2.2. RESET B1 or OUTSD MIN 160 3.2.3. SP MIN A2 or BOILER MIN 20 3.2.4. RESET B2 or OUTSD MAX 3.2.6. ACTION -10 3.2.7. SETBACK OFFSET 3.3. Second Modulating Output and Relays -10 3.3.1. SETPOINT OFFSET (MOD 2 only) 3.3.2. Second Modulating Output and Relays Programming 3.4. Exit Programming with Reset 4. SCHEDULING Creating a Schedule 4.1. Entering Schedule Mode 4.2. OPTIONS 4.2.1. SET TIME 4.2.2. SET DATE 4.2.3. DAYLIGHT (daylight saving time) 4.3. Setting Individual Schedules 4.3.1. E1 SETPT (setpoint for event 1) 4.3.2. E1 TIME (time for event 1) 4.3.3. E2 SETPOINT (setpoint for event 2) 4.3.4. E2 TIME (time for event 2) 4.3.5. EXIT (exit from selected time period settings) 4.4. Exiting Scheduling Mode SUMMARY MENU TROUBLESHOOTING Power Loss Errors and Diagnostics Error Message DoC Emissions Compliance Immunity Compliance Safety Compliance FCC Compliance Statement: Automation and Control Solutions