Zone Bus not supported - 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

Legacy UNT, VAV, AHU, and VMA1400 controllers supported a Zone Bus for connecting to:

  • TMZ Series network room sensors
  • TE-77 or TE-78 Series wireless temperature sensor and receivers
  • ZTU Zone Terminal Units
  • M100C Series networked actuators

N2-capable equipment controllers do not support the Zone Bus and do not support these devices. Instead, N2-capable equipment controllers feature a different technology bus called the Sensor Actuator (SA) bus to connect NS Series Network Sensors, DLK0350 Local Controller Display, DIS1710 Local Controller Display, and M4-XPM and IOM Expansion I/O Modules.

When using an N2-capable equipment 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 NS8000 sensor features a touch screen 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 you use an N2-capable equipment controller to replace a legacy N2 controller which uses a TE-77 or TE-78 wireless transmitter/receiver, you must also replace the TE-77 or TE-78 with the 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 using an N2-capable equipment controller to replace a legacy N2 controller that uses a ZTU Zone Terminal Unit, you must replace it with DLK0350 Local Controller Display or DIS1710 Local Controller Display.

When using an N2-capable equipment 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 N2-capable equipment controller. If none are available, add an M4-XPM or IOM Expansion I/O Module.