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The TR75 Zio Plus sensors are 2-wire, non-polarity sensitive, Sylk bus communicating wall modules for use with Spyder® and ComfortPoint™ programmable controllers. All models have a space-temperature sensor, network bus jack, and an LCD panel with three softkeys and two Up/Down adjustment keys. The Zio Plus also includes access to controller schedule and has more memory for additional parameters than the Zio sensors. The TR75-H models include an onboard humidity sensor.


  • Ability to control user access to controller parameters.
  • Parameter access can be customized by using the Tridium Niagara Workbench tool.
  • Programmable for: Home screen options, tenant access, contractor access, access to controller parameters, setpoint, override, fan, and other parameters.
  • Supplied with eight pre-programmed configurations (e.g. VAV with balancing) in the wall module configuration tool.
  • Ability to access and adjust most parameters in the programmable controller (including Scheduling).
  • Ability to balance the VAV system from the wall module.
  • Home screen can display one to three of any of the following parameters: Temperature Setpoint, Room Temperature, Room Humidity, Outdoor Humidity, Outdoor Temperature, and Time, or one of virtually any parameter in the controller.
  • Network bus jack.
  • Simple 2-wire terminal connection to the programmable controller and an optional 2-wire terminal connection for the network. All connections are polarity insensitive.
  • Retention of user configuration, including setpoints after a power outage.

Product Specifications

Wall Module Temperature Sensor
Dimensions (in.)
3 5/16 in. wide x 4 5/8 in. high x 15/16 in. deep
Dimensions (mm)
84 mm wide x 117 mm high x 24 mm deep
Used With
Spyder Sylk Enhanced
Configurable with Niagara Workbench
Item Type
Vertical Mount
Approvals, Underwriters Laboratories Inc.
UL94-HB plastic enclosure
Operating Humidity Range (% RH)
5 to 95% RH, non-condensing
Setpoint Temperature Range (C)
Default range is 10 C to 35 C; configurable for other ranges
Setpoint Temperature Range (F)
Default range is 55 F to 85 F; configurable for other ranges
Switch Positions (Fan)
Operating Temperature Range (F)
30 F to 110 F
Operating Temperature Range (C)
-1 C to 43 C
Shipping and Storage Temperature Range (F)
-40 F to +150 F
Shipping and Storage Temperature Range (C)
-40 C to 65.5 C
Approvals, Federal Communications Commission
FCC Part 15
Approvals, CE
Network Communications
Two-wire Sylk and Network Jack
Accuracy (F)
±0.36 F at 77 F
Accuracy (C)
±0.2 C at 25 C
±5% RH from 20% to 80% RH
Parameter Memory (Bites)
Password Protection
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