Zone bus considerations - Metasys - LIT-12012005 - Field Device - N2 Controller - 13.0

Modernization Guide for N2 Controllers - Metasys

Brand
Metasys
Product name
N2 Controller
Document type
User Guide
Document number
LIT-12012005
Version
13.0
Revision date
2023-10-16
Language
English

UNT controllers support a Zone Bus for optionally connecting TMZ Series network room sensors, TE-77 or TE-78 Series wireless temperature sensor or receivers, a ZTU Zone Terminal Unit, and M100C Series networked actuators. FEC and CGM controllers do not support the Zone Bus, and accordingly do not support these devices. Instead, the FEC and CGM controllers feature a Sensor Actuator (SA) Bus in which you can connect NS Series Network Sensors, DLK0350 or DIS Local Controller Display, and M4-XPM or IOM Series Expansion I/O Modules.

When you use an FEC or CGM 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, 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 you use an FEC or CGM controller to replace a UNT controller that uses a TE-77 or TE-78 wireless transmitter/receiver, you must also replace the TE-77 or TE-78 with the Metasys WRZ-7860 One-to-One Wireless Room Sensing System. For more information, refer to the WRZ-7860 One-to-One Wireless Room Temperature Sensing System Product Bulletin (LIT-12011410) .

When you use an FEC or CGM controller to replace a UNT controller that uses a ZTU Zone Terminal Unit, you must replace the ZTU with a DLK0350 or a DIS1710 Local Controller Display. You can partially duplicate the Zone Terminal Unit functionality with the DLK0350 or DIS1710. However, the DIS1710 does not provide access to real-time clock functions such as scheduling, trending, and alarming. The DLK0350 provides access to local trends and alarms, but does not currently support schedules.

When you use an FEC or CGM 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 FEC controller. If none are available, add an IOM or XPM series Expansion I/O Module.