Johnson Controls Facility Explorer Service-Handbuch

Technical Bulletin Network Room Module

Issue Date January 22, 2010

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,

•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).

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