T775U Series 2000 Electronic Stand-Alone Controller INSTALLATION INSTRUCTIONS PRODUCT DESCRIPTION The T775 electronic stand-alone controllers are the next generation of universal controls capable of remote sensing of temperature, humidity, pressure, etc. and providing switched and proportional outputs to various types of loads. A built-in time clock is standard. The T775U controller allows a wide range of sensors to be configured.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Temperature Sensorsa (Sensor A or B) Universal Sensors (Sensor A only) The controller accepts 1,097 Ohms PTC at 77°F (25°C): • 50021579-001 – Standard sensor (included with all models except NEMA 4X models) • T775-SENS-WR – Water resistant with 5 foot leads (included with NEMA 4X models) • T775-SENS-WT – Watertight with 6 foot lead • T775-SENS-OAT – Outdoor air temperature sensor • C7031D2003 – 5 inch immersion sensor with wiring box (use immersion well
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Dimensions TOP 1 (25.5) 7/8 (22.5) 2 15/16 (74) 4 13/32 (112.1) 1/2 (12.4) 3 31/32 (101) LEFT RIGHT 4 1/16 (103.4) 1/64 (3.8) 8 5/32 (207.1) 7 23/32 (196) 4 1/16 (103.4) 2 13/16 (71.8) 2 11/16 (68.1) FRONT VIEW 7/8 (22.5) 7/8 (22.5) 7/8 (22.5) 1 (25.5) BOTTOM M24546 Fig. 1. T775U Dimensions in inches (mm). BEFORE INSTALLATION Review the “Specifications” on page 37 before installing the controller.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Use a screwdriver to pry out only the knockouts that you will use. WIRING If mounting on DIN rail, be sure to remove the knockouts before mounting. See “Controller Wiring” on page 7 and Fig. 12 on page 9 for recommended knockout usage and locations. If you do not use an opened knockout be sure to cover it. All wiring must comply with applicable electrical codes and ordinances, or as specified on installation wiring diagrams.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Temperature Sensor Wire Type and Size SENSORS 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 page 10 for wire size selection where cable runs are longer than 25 feet. TO T775 CONNECTIONS (SENSOR A) OR (SENSOR B). M24548 Fig. 3. Parallel-series wiring of sensors.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SHIELDED CABLE SHIELDED CABLE NOTES: C S V T T NOTES: C S V T T 1. SHIELDED CABLE MUST BE CONNECTED TO A SEPARATE EARTH GROUND. HOWEVER, DO NOT GROUND SHIELDED CABLE AT SENSOR END. SENSOR A 1 SENSOR B 1. SHIELDED CABLE MUST BE CONNECTED TO A SEPARATE EARTH GROUND. HOWEVER, DO NOT GROUND SHIELDED CABLE AT SENSOR END. SENSOR A SENSOR B 2. TO MINIMIZE NOISE PICKUP, MAKE SENSOR CONNECTION FROM SHIELDED CABLE AS CLOSE AS POSSIBLE TO SENSOR BODY.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Wiring See Fig. 11 on page 8 for locating the appropriate power input, remote sensors input, low voltage, contact closure, and load output terminals. WARNING Access to the terminals can be gained through standard conduit knockouts (A through E in Fig. 11 on page 8) located around the perimeter of the enclosure: • Knockouts A and B should be used only for sensor and low-voltage wiring.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Wiring Details The wiring connection terminals are shown in Fig. 11 and are described in Table 2. See Fig. 12 – Fig. 18 beginning on page 9 for typical T775U wiring applications. Fig. 11. T775U Terminal and Feature Locations.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER WIRING APPLICATION EXAMPLES 1 Fig. 12 – 18 illustrate typical controller wiring for various applications. C–T S+T V NOTE: The electronic Series 90 output provided with modulating T775 models can not drive electromechanical slidewire devices like older Series 3 modulating meters (prior to Series 6), V9055s, and S984s.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER If any wiring changes are required, first be sure to remove power from the controller before starting work. Pay particular attention to verifying the power connection (24, 120, or 240 Vac). HONEYWELL ELECTRONIC SERIES 90 MODUTROL MOTOR T1 T2 1 B RW After the controller is mounted and wired, apply power.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Table 4. Temperature Sensor Calibration for Resistance Loss due to Wire Length. HOME RELAYS 1 2 ON Temperature Offset in °F (Feet)a MENU AREA SENSORS AWG Rating mΩ/ft 200 ft 500 ft 1,000 ft 14 2.5 0.46 1.14 2.28 16 4.0 0.72 1.82 3.64 18 6.4 1.16 2.90 5.82 20 10.2 1.86 4.64 9.28 22 16.1 2.92 7.32 14.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Up and Down Arrow Buttons (S and T) Use these buttons to move your selection up and down through a menu or list. • When the desired item is highlighted, you press the X arrow button to display that item’s content. • When a value is displayed (e.g. 70°F), the up and down arrows increase and decrease the value.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER NOTES: 1. 2. If you press the HOME button or there is no keypad activity for four minutes, you exit Program mode and return to the home screen. If you press the MENU button, you exit and return to the menu. PROGRAMMING OVERVIEW The controller must be programmed before being placed into service. IMPORTANT During programming, the controller is live at all times. For example, the contacts may open and close when adjusting the setpoint.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Setup Procedure The Setup process uses a hierarchical menu structure that is easy to use. You press the W and X arrow buttons to move forward and backward through the menus. NOTE: The menus can display only those relays that are defined in Setup (see “1.3.2. NBR OF RELAYS” on page 21). For example, if you configure only two relays, then only two relays display on the appropriate menus.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SENSORS SENSOR A TYPE 1.2.2.1. TYPE (Sensor A only) SETUP SENSORS SENSOR A TYPE PT 1000 0-5V 0-10V 4-20MA SELECT TYPE FOR SENSOR A M24589A Fig. 27. Setup - Sensors - Sensor A - Type. SETUP SENSORS SENSOR A UNITS SETUP SENSORS SENSOR A UNITS 1.2.2.2.1. UNITS (Sensor A or B; PT1000 [1097Ω PTC)] DEG F DEG C SELECT UNITS FOR SENSOR A M24590 Fig. 28. Setup - Sensors - Sensor A - Units.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SENSORS SENSOR A MIN VAL OR MAX VAL SETUP SENSORS SENSOR A MIN VAL 0.0 ENTER MINIMUM VALUE FOR SENSOR A SETUP SENSORS SENSOR A MAX VAL 0.0 oF oF ENTER MAXIMUM VALUE FOR SENSOR A M24592A Fig. 30. Setup - Sensors - Sensor A - 0-5V, 0-10V, OR 4-20MA - MIN and MAX Value (showing °F). SETUP SENSORS SENSOR A CALIBRATE SETUP SENSORS SENSOR A CALIBRATE 0.0 ENTER VALUE TO CALIBRATE SENSOR A 1.2.2.3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.2.2.5. Exit Sensor A Setup SETUP SENSORS SENSOR A Press the W button to exit Sensor A selections and return to the Sensors menu. or Use the S and T buttons to highlight EXIT and press the X button. UNITS CALIBRATE LABEL EXIT Continue with “1.2.3. SENSOR B (Temperature only)” M24596 Fig. 33. Setup - Sensors - Sensor A - Exit. SETUP SENSORS 1.2.3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS MOD 1 1.3.1. Setting up the Modulating Outputs SETUP OUTPUTS MOD 1 1. From the Output menu, use the S and T buttons to highlight the desired modulating output (MOD 1 or MOD 2). 2. Press the X button to display the selected MOD menu. TYPE MIN OUT % INTEGRAL DERIVATIV SCHEDULE RESET EXIT M24599 Use the remaining procedures, beginning with “1.3.1.1. TYPE (of output signal)”, to set up each modulating output.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER NOTES: (Integral Timing) 1. The Integral time is factory set for 400 seconds. This is a good middle range and should satisfy many applications. The integral time can be increased for applications where sensed response is slow, and can be decreased for applications where sensed response is fast (e.g. discharge air control). 2. As a starting point, an optimal integral time for discharge air typically ranges from 12 to 200 seconds.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS MOD 1 RESET SETUP OUTPUTS MOD 1 RESET 1.3.1.6. RESET This selection enables the controller’s Reset function, and allows each output to be individually programmed for Reset or No Reset. YES-BOILER YES-OTHER NO USE RESET FOR MOD1 IMPORTANT To use the Reset function of the controller, the first modulating output (MOD1) must be set for Reset here. M24605 Fig. 42. Setup - Outputs - Mod Out - Reset.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS # RELAYS 1.3.2. NBR OF RELAYS SETUP OUTPUTS # RELAYS 1. From the Outputs menu, use the Sand T buttons to highlight # RELAYS. 2. Press the X button to display the number of relays. 3. Use the S and T buttons to display the number from 1 to 2. 4. Press the X button to accept the value and display the Outputs menu.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS OPTIONS MIN OFF SETUP OUTPUTS OPTIONS MIN OFF 1.3.3.2. MIN OFF or MIN ON SETUP OUTPUTS OPTIONS MIN ON This is the minimum number of seconds of “off time” or “on time” for all relays. OR MIN ON 0 0 SEC ENTER MINIMUM OFF TIME FOR RELAYS SEC ENTER MINIMUM ON TIME FOR RELAYS 1. Press the X button to display the Min Off/On value. 2.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS OPTIONS SHOW RT SETUP OUTPUTS OPTIONS SHOW RT 1.3.3.4. SHOW RT (show run time hours) 1. Press the X button to display the Show RT values. 2. Use the S and T buttons to select YES or NO. Default: YES 3. Press the X button to accept the value and return to the Options menu. YES NO USE RUNTIME FOR RELAYS Selecting YES shows the RT (run time) hours for each relay on the home screen displays. M24612 Fig. 50.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS RELAY 1 RESET SETUP OUTPUTS RELAY 1 RESET 1.3.4.2. RESET IMPORTANT For relays to use the Reset function of the controller, both modulating outputs (MOD 1 and MOD 2) must be set for Reset. YES NO USE RESET FOR RELAY 1 Relays that have Reset set to YES use the reset curve configured for MOD 1. M24616 Fig. 54. Setup - Outputs - Relay - Reset. 1. Press the X button to display the Reset values. 2.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 2. PROGRAMMING OUTPUTS (MOD AND RELAY) WITH NO RESET NOTE: For applications where Reset is not used, only one sensor (Sensor A) is available for use. The T775U can be programmed for Reset or No Reset. From the factory, the T775U is programmed for No Reset. This section describes the steps necessary to program the controller for No Reset. 2.1.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM MOD 1 SETBACK MENU PROGRAM MOD 1 SETBACK 60 2.1.3. SETBACK The Setback temperature option displays only if scheduling is enabled (see Fig. 47 on page 21) or the DI Option is set to Setback. (see Fig. 49 on page 22). This is the desired setpoint temperature that you want to use during setback mode for this output.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM MOD 1 ACTION MENU PROGRAM MOD 1 ACTION 2.1.6. ACTION 1. From the menu, use the S and T buttons to highlight ACTION. Default: HEAT 2. Press the X button to display the action selections. 3. Use the S and T buttons to select the desired value. 4. Press the X button to accept the highlighted selection and display the next option. HEAT COOL REV ACT DIR ACT HUMID DEHUMID SELECT ACTION FOR MOD 1 M24583 Fig. 63. Program - Action. 2.2.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3. PROGRAMMING OUTPUTS (MOD AND RELAY) WITH RESET The T775U can be programmed for Reset or No Reset for each output. From the factory, the T775U is programmed for No Reset. This section describes the steps necessary to program the controller for Reset. To use the Reset feature, the first output (MOD 1) must be set to Reset=YES in Setup mode (see “3.1. Setting Up the Controller for Reset”).
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER NOTE: For MOD 2 and the Relays, a setpoint offset is used. See “3.3.1. SETPOINT OFFSET (MOD 2 only)” on page 32. °F SP MAX A1 (BOILER MAX) S E N S O R A 220 The remainder of this section beginning with “3.2. Program Menus for Outputs with Reset” on page 29 describes the individual parameters for configuring outputs with Reset. 210 200 190 For your reference, the following Reset programming procedure uses the values in Fig. 65 above.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM MOD 1 SP MIN A2 MENU PROGRAM MOD 1 SP MIN A2 3.2.3. SP MIN A2 or BOILER MIN (Setpoint minimum for Sensor A) 160 oF ENTER MINIMUM SETPOINT FOR SENSOR A M24574 1. From the menu, use the S and T buttons to highlight BOILER MIN or SP MIN A2. 2. Press the X button to display the setpoint value. 3. Use the S and T buttons to increase/decrease the desired minimum setpoint temperature. Default: 140°F (60°C) Range: -40°F to 248°F (-40°C to 120°C) 4.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM RELAY 1 ACTION MENU PROGRAM RELAY 1 ACTION 3.2.6. ACTION For the MOD 1 output (and for outputs with RESET=NO), the ACTION selection displays. HEAT COOL REV ACT DIR ACT HUMID DEHUMID For all other outputs with RESET=YES, the ACTION selection does not display; continue with “3.2.7. SETBACK OFFSET (if configured)” on page 31. SELECT ACTION FOR RELAY 1 M24578 Fig. 72. Program - Action Selection.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU PROGRAM MOD 2 OFFSET MENU PROGRAM MOD 2 PROGRAM MOD 2 3.3. Second Modulating Output and Relays For the second Modulating Output and the two Relays (if they are configured for Reset), the Offset parameter displays on the Program menu as shown in Fig. 74. OFFSET THROT RNG ACTION SETBACK EXIT -10 oF ENTER SETPOINT OFFSET FOR MOD 2 M24547 Fig. 74. Program - Setpoint Offset (MOD 2 only).
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 4. SCHEDULING Scheduling provides the ability to set daily temperature settings for up to two events per day. Typically, these are the daytime (setpoint) and the nighttime (setback) settings. IMPORTANT To enable Scheduling, you must first enter Setup mode (press and hold the MENU button for 5 seconds), select OUTPUTS, select OPTIONS, select USE SCHED, and then select YES. (see “1.3.3.1. USE SCHED” on page 21).
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN SCHEDULE OPTIONS SET TIME MAIN SCHEDULE OPTIONS SET TIME 4.2.1. SET TIME Setting the system time is required to enable the controller to follow daylight saving time. IMPORTANT Set the Date before setting the Time. See “4.2.2. SET DATE”. 08:12 AM SET SYSTEM TIME M24622 Fig. 78. Schedule - Options - System Time. MAIN SCHEDULE OPTIONS SET DATE MAIN SCHEDULE OPTIONS SET DATE 4.2.2.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU SCHEDULE MON-FRI 4.3. Setting Individual Schedules MENU SCHEDULE MON-FRI As shown in the Schedule menu (Fig. 76 on page 33), schedules can be set for the following time periods: • Monday through Friday • Saturday and Sunday • Individual days of the week E1 SETPT E1 TIME E2 SETPT E2 TIME EXIT 1. From the Schedule menu, use the S and T buttons to highlight the desired time period. 2.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN SCHEDULE MON-FRI E1 TIME MAIN SCHEDULE MON-FRI E1 TIME 4.3.2. E1 TIME (time for event 1) 6:00 AM SET TIME FOR EVENT 1 M24627 1. From the selected time period menu, use the S and T buttons to highlight E1 TIME. 2. Press the X button to display the current time setting for event 1. 3. Use the X button to cycle between the hour, minute, and AM/PM values. 4.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SUMMARY MENU Error Message The Summary menu provides the ability to view the schedule (E1 and E2 times) for each relay for each day of the week. EE NOTE: Scheduling must be enabled for the Summary menu to display. Enabling the schedule is determined in the Setup process for the Output Options (see page 21).
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER DoC Emissions Compliance EN 55022: 2006 CISPR 22: 2006 VCCI V-3/2006.04 ICES-003, Issue 4: 2004 FCC PART 15 SUBPART B Class B Limit Immunity Compliance EN 61000-6-1: 2001 covering EN 61000-4-2: 1995 + A1: 1998 + A2: 2001 EN 61000-4-3: 2002 EN 61000-4-4: 2004 EN 61000-4-5: 1995 + A1: 2001 EN 61000-4-6: 1996 + A1: 2001 EN 61000-4-8: 1993 + A1: 2001 EN 61000-4-11 2nd Ed.
T775U SERIES 2000 CONTROLLER 39 62-0255–07
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Toronto, Ontario M1V 4Z9 customer.honeywell.com ® U.S. Registered Trademark © 2009 Honeywell International Inc. 62-0255—07 E.K. Rev. 10-09 Printed in U.S.A.