Legacy UNT, VAV, AHU, and VMA1400 controllers supported a Zone Bus for connecting to:
- TMZ Series network room sensors
- TE-77 Series wireless temperature sensor and receivers
- ZTU Zone Terminal Units
- M100C Series networked actuators
When using an FX-PC controller to replace a legacy N2 controller that uses a TMZ sensor, you must also replace the TMZ sensor with an NS Series Network Sensor. Make note of any wiring change or modifications needed when using a new sensor. The NS sensor provides many of the same functions as the TMZ sensor, including zone temperature sensing, zone temperature setpoint adjustment, and LCD display. However, the NS sensor is housed in an enclosure that has a different user interface. For example, the NS sensor features a dial to adjust the zone temperature setpoint, whereas the TMZ features a pushbutton keypad. As a result, we recommend you work with your customer to help them and their building’s occupants understand how to use the adjustment features of the new NS sensor.
When using an FX-PC controller to replace a legacy N2 controller which uses a TE-77xx wireless transmitter/receiver, you must also replace the TE-77xx with the Facility Explorer One-to-One Wireless Room Sensing System. For more information, refer to the Facility Explorer One-to-One Wireless Room Sensing System Product Bulletin (LIT-12011664).
When using an FX-PC controller to replace a legacy N2 controller that uses a ZTU Zone Terminal Unit, you must replace it with an FX-DIS1710 Local Display/Keypad.
When using an FX-PC controller to replace a legacy N2 controller that uses an M100C zone bus actuator, you must replace the actuator with a non-networked actuator. For dampers, use the M9100/M9200 Series. For valves, use the VA7800/VA-7150 Series. To control the new actuator, use an available analog output or configurable output on the FX-PC controller. If none are available, add an FX-PCX Expansion I/O Module.