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manual abstract
A built-in time clock is standard. The T775U controller allows a wide range of sensors to be configured. Humidity, pressure, temperature, or any 0-5 Vdc, 0-10 Vdc, or 4-20 mA input is supported. A Reset function is available where the Sensor B temperature (e.g. outside temperature) is used to provide reset control for Sensor A (e.g. humidity). For example, as the outside temperature gets colder, the setpoint can automatically be adjusted to prevent condensation. IMPORTANT The T775U is an operating control, not a limit or safety control. If used in applications requiring safety or limit controls, a separate safety or limit control device is required. Table 1. T775U Controller Configurations. Controller Modela Description Replaces OutputReset SPDT RelayOutputs Analog(Mod) Outputsb Sensor Inputs Nbr of Sensors Included Enclosure T775U2006 Universal: Humidity, Pressure, Temperature, etc. H775A1006 H775A1022 H775A1048 H775A1063 H775B1005 H775C1004c H775D1003c H775E1002c Yes 2 2 2d None NEMA 1 T775U2016 N/A Yes 2 2 2e None NEMA 1 a The T775U includes a digital input for use with the disable or setback option. b The modulating (analog) outputs may be 4-20 mA, 0-10 Vdc, 2-10 Vdc, or Series 90 selectable. c For the H775C1004, H775D1003, and H775E1002 model replacement, the T775U only partially replaces the function of these devices. Check application for suitability. d For the sensor inputs, Sensor A can be 0-10Vdc, 4-20mA, or a standard temperature input. Sensor B is a standard temperature sensor input only. Sensor B is used only for reset on the T775U2001. e The T775U2016 can control Sensor A (universal) and Sensor B (temperature) independently, like other standard T775 controllers. E4436 62-0255-07 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER a (Sensor A or B) 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; P/N 50001774-001) • C7031J2009 – 12 foot duct averaging sensor with wiring box • C7046D1008 – 8 inch duct probe with mounting flange • C7100D1001 – 12 inch fast response, duct averaging sensor with flange • C7130B1009 – Room mount sensor Differential Pressure Sensors (Sensor A only) P7640A and PWT pressure transducer models with selectable pressure ranges can be used. The controller accepts pressure sensors with a signal output of 0-10 Vdc or 4-20 mA for any output range within the following ranges (the minimum and maximum for the sensor output range can be adjusted within the following limits): • -500 to 500 PSI • -30.0 to 30.0 inches w.c. • -3,000 to 3,000 Pa • -3,000 to 3,000 kPa Humidity Sensors (Sensor A only) The controller accepts 0-10 Vdc or 4-20 mA input with a range of 0-100%. H7625, H7635, and H7655 models (available in 2, 3, and 5% RH accuracy) can be used. CO2 Sensors The controller accepts a 0-10 Vdc or 4-20 mA input from C7232 and C7632 CO2 sensors and is settable in PPM units. a See form 62-0265 – Temperature Sensors for the T775 Series 2000 Stand-alone Controller Universal Sensors (Sensor A only) The controller accepts 0-5 Vdc, 0-10 Vdc or 4-20 mA input for temperature, pressure, humidity CO2, etc. They may be programmed in units of °F, °C, %, Pa, kPa, PSI, In W.C., PPM, or may be unitless (none). The PPM range is 0 to 9990. Choosing none for units, results in no units being displayed on the home screen. If no unit is specified the range is -9999 to +9999. Actuators For more information on compatible actuators or other Honeywell products, such as dampers and valves, go to From the home page select Product Selection Tool under Products. • Spring return models: ML6425, ML7425, MS4105, MS4110, MS4120, MS7505, MS7510, MS7520, MS8105, MS8110, MS8120 • Non-spring return models: ML4161, ML6174, ML7161, MN6105, MN1010, MN7505, ML7164, MN8810 Accessories • 107324A – Bulb Holder, duct insertion • 107408 – Heat Conductive Compound, 4 ounce • 50001774-001 – Immersion Well, stainless steel 304, 1/2 in. threading Product Changes Below are the changes to T775U models starting with Series 3 (March 2009). Series 3 can be identified by the sideways 3 after the part number on the device label. 1. Setpoint and Enable options added to the DI options. 2. 0-5 Vdc sensor inputs are now available (for both models). 3. MIN ON time added. 4. HIDE option added to MOD1 and MOD2 (to hide them on the home screen). 5. PPM and None added to sensors’ unit of measure. 6. With the new T775U2016 model, all outputs can be controlled to Sensor A or Sensor B. The T775U2006 model controls only to Sensor A. 62-0255—07 2 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER T775U SERIES 2000 ELECTRONIC STAND-ALONE CONT...