Overview The TR21, TR22, TR23, and TR24 are a family of direct wired wall modules for use with Honeywell Excel 600, 500, 100, and 80 controllers; Excel 10 W7750, W7751A, W7752, and W7753 controllers; W7761 Controller; and Spyder Unitary Controllers. Features Models available with user selectable setpoint adjustment dials in Fahrenheit, Celsius and Relative Scales Models available with occupied/unoccupied override (bypass) with LED Models available with 3-position (auto/0/1) or 5-position (auto/0/1/2/3 speed) fan switch LONWORKS network jack on all models except the TR21 and TR21-A models Models available with on board humidity sensor, humidity output: 0-10Vdc, 0-5 Vdc, 4-20ma selectable Product Specifications ApplicationWall Module Networked Sensor Dimensions (in.)4 13/16 in. high x 3 in. wide x 1 in. deep Dimensions (mm)122mm high x 76.5 mm wide x 26.5 mm deep IncludesHumidity, Selectable Setpoint dials in Fahrenheit, Celsius, and Relative (- to +), LON Jack and Override Button with LED. Used WithSpyder, Excel 600, 500, 100, 80 and Excel 10, 15 Series Controllers; Also used with T7350 Thermostat Item TypeProduct MountingMounted on a standard 2 x 4 inch junction box or on a 60 mm diameter junction box. Approvals, Underwriters Laboratories Inc.UL94 plastic enclosure Operating Humidity Range (% RH)5 to 95% RH, non-condensing Sensor20 K ohm NTC non-linear Setpoint Temperature Range (C)13 C to 30 C Setpoint Temperature Range (F)55 F to 85 F Operating Temperature Range (F)45 F to 99 F Operating Temperature Range (C)7 C to 37 C Shipping and Storage Temperature Range (F)-40 F to +150 F Shipping and Storage Temperature Range (C)-40 C to +65 C Approvals, Federal Communications CommissionFCC Part 15, Class B Approvals, CEApproved Network CommunicationsLonWorks Bus ColorWhite