UNT controllers support a Zone Bus for optionally connecting TMZ Series network room sensors, TE-77 Series wireless temperature sensor or receivers, a ZTU Zone Terminal Unit, and M100C Series networked actuators. FX-PC controllers do not support the Zone Bus, and accordingly do not support these devices. Instead, FX-PC controllers feature a Sensor Actuator (SA) bus for connecting NS Series Network Sensors, FX-DIS Local Display/Keypad, and FX-PCX Series Expansion I/O Modules.
When using an FX-PC controller to replace a UNT controller that uses a TMZ sensor, you must also replace the TMZ sensor with an NS Series Network 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 UNT controller that 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 UNT controller that uses a ZTU Zone Terminal Unit, you must replace the ZTU with an FX-DIS1710 Local Display/Keypad. You can partially duplicate the Zone Terminal Unit functionality with the FX-DIS1710. However, the FX-DIS1710 does not provide access to real-time clock functions such as scheduling, trending, and alarming.
When using an FX-PC controller to replace a UNT 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 the available analog output or configurable output interfaces on the FX-PC controller. If none are available, add an FX-PCX Expansion I/O Module.