Johnson Controls Facility Explorer Service manual

Technical Bulletin Network Room Module
Issue Date January 22, 2010
©2010 Johnson Controls, Inc.
Code No. LIT-12011258
Network Room Module
Introduction to Network Room Module (NRM).....................................3
Concepts.............................................................................................................. 4
Features.............................................................................................................................4
Controls..............................................................................................................................5
Functions and Setup of the Network Room Module...........................................................6
Network Room Module Parameters (Room Sensor Object) ............................................13
Installing and Commissioning the Network Room Module..............15
Introduction........................................................................................................ 15
North American Emissions Compliance...........................................................................15
Key Concepts..................................................................................................... 16
Location of the Network Room Module............................................................................16
Dimensions of the Network Room Module.......................................................................17
Wiring...............................................................................................................................18
Addressing.......................................................................................................................19
Service Port......................................................................................................................20
Commissioning the Network Room Module.....................................................................22
Procedure Overview.........................................................................................................23
Detailed Procedures.......................................................................................... 23
Opening the Network Room Module................................................................................23
Mounting the NRM Directly on a Wall Surface.................................................................24
Mounting the NRM (80 x 80 mm) on a Wall Surface Using the
Plastic Base for Surface Mounting...................................................................................26
Mounting the NRM (80 x 80 mm) on a Recessed Wall Box.............................................27
Commissioning the NRM Module.....................................................................................29

Network Room Module Technical Bulletin2
Troubleshooting...................................................................................30
Specifications and Ordering Codes....................................................31
Specifications and Technical Data................................................................... 31
Ordering Codes ................................................................................................. 32

Network Room Module Technical Bulletin 3
Introduction to Network Room
Module (NRM)
Network Room Modules (NRMs) are electronic, wall-mountable
temperature sensors designed to be used with the Facility Explorer field
controllers.
Note: See the Specifications and Ordering Codes section for details
about compatible controllers.
All NRM models monitor room or space temperature. In addition, you can
order NRMs with a backlit Liquid Crystal Display (LCD) to display the
room temperature and local setpoint. Graphical display symbols can
indicate fan speed selection and the need for maintenance. Optional
operating controls include a dial to locally adjust the space temperature
setpoint, a push button to manually override the fan speed, and a push
button to select Fahrenheit (°F) and Celsius (°C) units of measure.
The NRM connects to the Remote Display link of the Facility Explorer
field controller. Terminals are located in the mounting base for ease of
wiring. The NRM is enclosed in an attractively styled plastic housing,
which easily mounts on a wall.
Figure 1: Network Room Modules

Network Room Module Technical Bulletin4
Concepts
Features The NRM (Figure 2) is styled to blend with the decor of today’s
commercial and public buildings. Terminals are located in the mounting
base for ease of wiring. The module also has a built-in temperature sensor
used to measure space temperature for display and transmission to the
connected controller. If the controller has its own space temperature
sensor, then it communicates its temperature values to the module for
display.
Located on the front of the room command module are the operating
controls and an LCD with three numerical digits and various operating
mode symbols. With the NRM, you can:
•view the space (room) temperature
•view and manually adjust the space temperature setpoint
•manually override the speed of the fan in the controlled equipment
•see when the controller is in the Off mode
•see when a maintenance condition exists
•request the temporary occupied mode during unoccupied or standby
mode operation by pressing a push button or rotating the dial
•change the temperature display units from °F to °C (North American
models only)
Some of these functions may not be available or are limited by the
configuration of the module or controller.

Network Room Module Technical Bulletin 5
The NRM has a service port (located on the lower edge of the module).
Use the service port to gain access to the serial bus for the host FX field
controller. Two types of service ports are available (see Figure 2 for
service port location).
•The service port for NRM model LP-NRM0xx-000C is a 4-pin
connector and is used to interface with the FX Programming Key.
•The service port for NRM models LP-NRM5xx-000C and
LP-NRM6xx-000C is a 6-pin Modular Jack connector and is used to
interface with the Medium User Interface (MUI).
Figure 2: Features of the Network Room Module
Controls Table 1 shows how the dial and buttons are used in the NRM.
Table 1: Controls
Control Description
Setpoint Dial
Used to change the temperature setpoint
value: turning right increases the setpoint and
turning left decreases the setpoint. When you
move the dial, the display shows the current
space temperature setpoint.
Fan Push Button
Used to override the fan status from Auto to
Off, low, medium, or high speed.
°F/°C
°F/°C Push Button
Used to toggle the temperature display units
between °C and °F.

Network Room Module Technical Bulletin6
Figure 3 shows the layout and symbols of the LCD, and Table 2 describes
the symbols.
Figure 3: LCD Symbol Options
Table 2: Symbols on the LCD
Control Description
Temperature display digits
Fan speed status bars – low, medium, and high speed (high
speed shown)
°CCelsius temperature unit
°FFahrenheit temperature unit
AUTO The Auto icon indicates that the fan is in auto mode.
OFF The Off icon indicates that the fan has been manually set to Off
(not running).
The Maintenance icon indicates an off-normal condition that
requires attention.
The Occupancy Mode icon indicates the occupied/unoccupied
mode of the controller (LP-NRM5xx-000C and LP-NRM6xx-
000C Series only).
Functions and Setup of the Network Room Module
The NRM is a network device with no hardware inputs or outputs and
connects to the Facility Explorer controller via the display (or local link)
bus. All the communication access and setup of the NRM is done through
the controller where the NRM is connected. The configuration properties
of the NRM are set in the Room Sensor object in the controller when the
control application for the controller is generated in the FX Builder tool.
When the application is downloaded to the controller, you use the
FX CommPro N2, LON, or BACnet commissioning tool to monitor the
network variables of the NRM in the Room Sensor object through the
network profile of the controller.
This section describes the various functions and display features of the
NRM, the network variables used by each function, and the configuration
properties used to set up each function.

Network Room Module Technical Bulletin 7
See Network Room Module Parameters (Room Sensor Object) for a
detailed list of the variables and properties of the NRM. The names of the
network variables and configuration properties appear in boldface type
throughout this document.
Note: After a power failure, the NRM restarts using the values in its
configuration properties and any setpoint changes or fan speed overrides
are cancelled. In particular, if you set the Setpoint Configuration to
absolute, you should also set the Default Absolute Setpoint for the
controlled space in case of a power interruption. The factory set value is
21°C (70°F).
Display
The NRM models with display are factory-configured to show space
temperature. The models with the fan speed override function are
configured for three-speed fan control. As soon as you connect the NRM
to a controller with a configured Room Sensor object, the properties in the
Room Sensor object transmit to the NRM and replace the factory set
values.
You can change the setpoint temperature by rotating the dial. The space
setpoint value appears and blinks for a few seconds, waiting for a change.
The NRM then confirms the change to the controller and displays the
space temperature again (if enabled).
In models with the fan speed override function, you can change the fan
speed by pressing the fan push button. The fan status display cycles
through the steps AUTO, OFF, Low Speed, Medium Speed, and High
Speed, according to the fan configuration.
If you set the Enable Space Temperature Display configuration property
to disabled (OFF), the NRM always shows the space setpoint temperature
and does not show the actual space temperature.
Note: The network variable output Space Temperature Output
always sends its internal space temperature value, even if the space
temperature does not appear.
Depending on the values of the Setpoint Configuration and
Temperature Units configuration properties, the display shows either the
absolute setpoint or the setpoint offset. The absolute setpoint is stored in
the Setpoint Output (Absolute) network variable output. The setpoint
offset is stored in the Setpoint Output (Offset) network variable output.
Some space setpoint temperature display examples are shown in Figure 4
and Figure 5.

Network Room Module Technical Bulletin8
Figure 4: Absolute Setpoint Values in Celsius and Fahrenheit Units
Figure 5: Relative (Offset) Setpoint Values in Celsius Units
Setpoint Adjustment
You can change the value of the setpoint by rotating the NRM dial to the
right to increase the setpoint, and to the left to decrease the setpoint. The
display stops at the high and low limits. The high and low limits are:
•±3°C (±5°F) - if the NRM is configured to display the setpoint offset,
or
•the values are defined in the Space Temperature Setpoint Low Limit
and Space Temperature Setpoint High Limit configuration
properties, if the NRM is configured to display the absolute setpoint.
The default absolute setpoint limits are 12 and 28°C (53.5 and 82.5°F).
When you adjust the setpoint, the value you enter is transmitted to the
controller via either the network variable output Setpoint Output
(Absolute) or Setpoint Output (Offset), depending on the value of
Setpoint Configuration. The network variable that is not used is set to an
invalid value.
The Setpoint Output (Absolute) value when the NRM starts up is
determined by the Default Absolute Setpoint value in the Room Sensor
object in the controller. The factory set value is 21°C (70°F). The Setpoint
Output (Offset) value is zero at startup.
Fan Speed Adjustment
In NRM models with the fan speed override function, you can change the
speed of the fan by pressing the fan push button until the desired speed
appears on the fan speed bars. See Figure 6. The override value then
transmits to the controller via the network variable output Fan Speed
Override. When the fan is set to Off mode by an override command, the
OFF symbol appears.

Network Room Module Technical Bulletin 9
When the fan is set to Auto mode, the Auto symbol appears, and the
controller determines the fan speed using its internal control algorithm.
Figure 6: Fan Speed Display in Manual Override
The fan symbol ( ) is always shown, whether the fan is running or not.
Examples of the fan speed display are shown in Table 3.
Table 3: Examples of Fan Speed Display
Control Description
Fan speed was overridden to medium speed by the user.
Fan speed is overridden to OFF by the user.
Fan in AUTO mode – no override by user. The actual fan
speed is not shown.
The type of fan is configurable in the property Fan Configuration for:
•None (no fan)
There is no fan. The fan override function is disabled (Figure 7).
Figure 7: No Fan Display
•One speed
If you set the property to One speed fan, pressing the fan push button
cycles the fan status: AUTO, OFF, and ON. The display fills all three
fan bars to indicate the ON status.
•Two speed
If you set the property to Two speed fan, pressing the fan push button
cycles the fan status: AUTO, OFF, low, and high speed. The display
shows two fan bars for low speed and three bars for high speed.

Network Room Module Technical Bulletin10
•Three speed
If you set the property to Three speed fan, pressing the fan push
button cycles the fan status: AUTO, OFF, low, medium, and high
speed.
Occupancy Mode
The LED display indicates the Effective Occupancy Status when the
Enable Unoccupied State Blink configuration property is set to enabled
(ON) and the network variable input Effective Occupancy Status value
shows that the occupancy mode is UNOCCUPIED or STANDBY. See
Figure 8 and Table 4.
Figure 8: Occupancy Mode Icon for
LP-NRM5xx-000C and LP-NRM6xx-000C Series NRMs
Table 4: Effective Occupancy Status
NRM Series Effective
Occupancy
Status
Icon/Description
Occupied The display remains on.
LP-NRM0xx-000C Series Unoccupied or
Standby The display blinks off/on approximately every
3 seconds.
Occupied
LP-NRM5xx-000C and
LP-NRM6xx-000C Series
Unoccupied or
Standby
This feature indicates to the unexpected occupant (or an occupant present
during nonstandard hours) that the controller is not in the OCCUPIED
mode. You can disable this feature by setting the Enable Unoccupied
State Blink configuration property to disabled (OFF).