Mounting - Johnson Controls - Part No. 24-10094-9 - Surface-Mounted NS Series Network Sensors with LCD

Surface-Mounted NS Series Network Sensors with LCD Installation Guide

Johnson Controls
Product name
Surface-Mounted NS Series Network Sensors with LCD
Document type
Installation Guide
Document number
Part No. 24-10094-9
Document revision
Revision date

About this task

Location Considerations

Locate the network sensor:

  • on a partitioning wall, approximately 5 ft (1.5 m) above the floor in a location of average temperature
  • away from direct sunlight, radiant heat, outside walls, outside doors, air discharge grills, or stairwells; and from behind doors
  • away from steam or water pipes, warm air stacks, unconditioned areas (not heated or cooled), or sources of electrical interference
Note: The network sensor is shock and vibration resistant; however, be careful not to drop the unit or mount it where it could be exposed to excessive vibration.

The following ambient operating conditions apply:

  • Temperature: 32 to 104°F (0 to 40°C)
  • Humidity: 10 to 90% Relative Humidity (RH), noncondensing; 85°F (29°C) maximum dew point

To mount the network sensor to the wall:


  1. Use a 1/16 in. (1.5 mm) Allen wrench or Johnson Controls T-4000-119 Allen-Head Adjustment Tool to loosen the security screw on the top of the unit.
  2. Insert a coin into the slot next to the security screw location, then carefully pry the top edge of the sensor assembly away from its mounting base and remove.
    Important: Do not remove the Printed Circuit Board (PCB). Removing the PCB voids the product warranty.
  3. Pull out approximately 6 in. (152 mm) of cable from the wall, and insert the cable through the hole in the mounting base.
  4. Align the mounting base on the wall, and use the base as a template to mark the location of the two mounting holes on the surface.
    Note: Confirm that the mounting base is positioned with the proper edge up. The mounting base is positioned properly when the security screw is located on the top edge of the base.
  5. Secure the mounting base to the wall using the appropriate mounting hardware (field furnished).
  6. Wire the network sensor. For more details on wiring the MS/TP Communications Bus, refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034) or the FX-PC Series Controllers MS/TP Communications Bus Technical Bulletin(LIT-12011670).

    For models featuring a modular jack, simply snap the wiring plug into the jack. See Figure 1 for modular jack pin number assignments. Modular jack models require a straight-through, one-to-one connection (not a crossover). For models featuring a screw terminal block, wire the unit as illustrated in Figure 2.

    • Risk of Electric Shock
    • Disconnect the power supply before making electrical connections to avoid electric shock.
    • Risque de décharge électrique
    • Débrancher l'alimentation avant de réaliser tout raccordement électrique afin d'éviter tout risque de décharge électrique.
    Important: Failure to adhere to these wiring details causes the network sensor to function incorrectly. You will not be able to connect to the system using the wireless commissioning converter or the handheld VAV balancing tool, and you will not be able to expand the system with future offerings.
    Figure 1. Modular Jack Pin Number Assignments

    Figure 2. Wiring to the Screw Terminal Block

  7. Align the tabs on the bottom edge of the mounting base with the slots on the bottom edge of the network sensor assembly, and rotate the assembly onto its mounting base.
    Note: On models featuring a screw terminal block, be certain that the terminal block pins align with the holes in the terminal block.
  8. Use a 1/16 in. (1.5 mm) Allen wrench or Johnson Controls T-4000-119 Allen-Head Adjustment Tool to tighten the security screw and fasten the network sensor assembly to the mounting base.
    Note: Do not overtighten the security screw to avoid damaging the unit.
  9. Use the Metasys Controller Configuration Tool (CCT) or Facility Explorer Programmable Controller Tool (FX-PCT) software to commission the network sensor. Refer to the Controller Tool Help (LIT-12011147) for more details.