Johnson Controls LN Series Manuel utilisateur

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions 1

Applications

The LN Series LN-VSTAT and LN-PSTAT sensors are

specifically designed to connect to the SMRT ports of

the Johnson Controls’ LN Series controllers. The

LN-VSTAT-1 works with the LN-VAVFLFS-1 and

LN-VVTLFS-1 controllers. The LN PSTAT-1 works with

the LN-PFCU-1 and LN-PFCUA-1 controllers. The

SMRT ports supply power and serial communications

to the LN-VSTAT and LN-PSTAT sensors. The device

provides precision local temperature sensing and it

allows occupants to adjust the local setpoint and view

the occupancy status, local space temperature, and

outside air temperature.

North American Emissions Compliance

United States

Canada

Installation

For proper installation and subsequent operation of the

LN-VSTAT and LN-PSTAT sensors, follow these

recommendations:

• Allow for proper clearance of device casing and

wiring terminals for easy access, hardware

configuration, and maintenance.

• The sensor is designed to operate under the

following conditions:

• Ambient temperature between 32º to 158ºF

(Oº to 70ºC)

• Relative humidity from 0% to 95%,

non-condensing

• Ensure proper ventilation of devices and avoid

areas where corroding, deteriorating, or explosive

vapors, fumes, or gasses may be present.

IMPORTANT: Work in a static-free area. Discharge

static electricity by touching a known, securely

grounded object. Do not handle the controller without

proper protection against static discharge. Use a wrist

strap when handling the controller. Secure the wrist

strap clamp to earth ground.

Compliance Statement (Part 15.19)

This device complies with Part 15 of the FCC Rules.

Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received,

including interference that may cause undesired

operation.

Warning (Part 15.21)

Changes or modifications not expressly approved by the

party responsible for compliance could void the user’s

authority to operate the equipment.

To comply with FCC RF exposure requirements for mobile

transmitting devices, this transmitter should only be used

or installed at locations where there is at least 20cm

separation distance between the antenna and all persons.

Industry Canada Statement

This Class (A) digital apparatus meets all the requirements

of the Canadian Interference-Causing Equipment

Regulations.

Le terme «IC» précédant le numéro de d'accréditation/

inscription signifie simplement que le produit est conforme

aux spécifications techniques d'Industry Canada.

LN Series LN-VSTAT and LN-PSTAT Sensors

Installation Instructions

LN-VSTAT-1, LN-PSTAT-1 Code No. LIT-12011302

Issued November 9, 2007

Supersedes May 2, 2007

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions2

Dimensions

Mounting

Location Considerations

The LN-VAV/VVT controllers are designed for easy

installation. However, certain conditions apply when

choosing a location for the device:

• The LN-VSTAT and LN-PSTAT sensors should not

be installed on an outside wall

• Install the sensor away from any heat source

• Install the sensor away from discharge air grills

• Install the sensor away from areas where it can be

affected by the sun

• Install the sensor in an area that provides proper

device ventilation. Ensure nothing restrains air

circulation to the sensor.

Note: The LN-VSTAT and LN-PSTAT sensors are not

designed for outdoor use.

Figure 1: LN-VAVLF, LN-VAVCF, and LN-VVTLF Controller Dimensions

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions 3

Installation

1. Unscrew the security screw on the bottom of the

casing (Figure 2).

2. Open the cover by pulling the bottom side of the

casing outwards. Flip printed circuit board to

access mounting hole.

3. Pull cables 6 in. out of the wall and insert them in

the central hole of the base.

4. Align the base and mark the location of the two

mounting holes on the wall. Ensure the correct side

of the base is facing upwards.

5. Remove the device and drill holes, if necessary.

6. Install anchors into the wall, if necessary.

7. Ensure the mounting surface is flat and clean.

8. Insert screws in mounting holes of the base. Do not

overtighten the screws.

9. Strip each wire 1/4 in.

10. Gently push excess wiring back into the wall.

11. Flip the printed circuit board back into place.

12. .Flip down the front cover verify it clips tightly into

place.

13. Install the security screw (Figure 3).

FIG:mntng_bs

Figure 2: Mounting the LN-VSTAT and

LN-PSTAT sensors

Figure 3: LN-VSTAT and LN-PSTAT Sensors

Security Screw

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions4

Wiring

IMPORTANT: Make all wiring connections in

accordance with the National Electrical Code and all

local regulations. Use Copper conductors only. Do not

exceed the control’s electrical rating.

The LN-VSTAT and LN-PSTAT sensors draw power

and communicate with the associated controller over

the SMRT wiring using a serial communication protocol.

Figure 4 shows the terminal wiring details.)

Wiring the LN-VSTAT and LN-PSTAT Sensors

to a Controller

The LN-VSTAT and LN-PSTAT sensors use a serial

communication protocol and are designed to connect to

the serial inputs labelled SMRT+ and SMRT- on the

LN-VAVLF and LN-VVTLF controller.

Note: The LN-VAVCF controller does not support the

LN-VSTAT and LN-PSTAT sensors.

To wire a wall mounted LN-VAV/VVT controller:

1. Remove the faceplate.

2. Use a screwdriver to press down the tabs located

on the bottom of the sensor to remove the cover.

CAUTION: Risk of Electric Shock.

Disconnect power supply before making

electrical connections to avoid shock.

SMRT-

SMRT+

LON (Optional)

1/8" Com.

Jack 1234

Figure 4: LN-VSTAT and LN-PSTAT Sensors

Terminal Wiring Details

Figure 5: SMRT+ and SMRT- Output Terminal

Location

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions 5

3. Connect the SMRT+ and SMRT- output terminals

of the LN-VSTAT to the SMRT+ and SMRT- input

terminals on the LN-VAV/VVT controller (Figure 6).

Using the LN-VSTAT as a Portable Device

You can use the LN-VSTAT sensors as a portable

device to perform VAV balancing. If an LN-Sensor is

already connected to the VAV that you intend to

balance, directly connect the LN-VSTAT to the

communication jack within the LN Series Sensor.

Note: Terminals 1 and 2 of the right most terminal

block within the LN Sensor must be connected to the

SMRT+ and SMRT- inputs of the VAV controller before

you can use the communication jack. Typically, these

connections should have been made when the VAV

controller and LN Sensor were first installed.

To connect the LN-VSTAT sensors to an LN-Sensor

using an 1/8 in. mono or stereo audio cable:

1. Use the taps on the bottom of thesensor to remove

the sensor face plate.

2. Connect the SMRT+ and SMRT- output terminals

of the LN-VSTAT sensors to two wires that

terminate in the 1/8 in. audio plug (Figure 7).

3. Remove the LN Sensor faceplate and insert the 1/8

in. audio plug into the communication jack. Ensure

the two output terminals on the right side of the

LN-Sensor are wired to the SMRT+ and SMRT-

terminals of the LN-Sensor (Figure 8).

Figure 6: LN-VSTAT and LN-PSTAT Sensors -

Wired to Controller

LN-VAV LN-VSTAT

Figure 7: SMRT+ and SMRT- Output Terminals

with Audio Plug

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions6

Connect 1/8 in. Audio Plug

from LN-VSTAT Sensor

Figure 8: LN Sensor Wiring

LN-VAV LN Sensor LN-VSTAT

Figure 9: LN-VSTAT and LN-PSTAT sensors Wired

to LN Sensor Using an Audio Plug

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions7

Communications Wiring

You can optionally wire Terminals 3 and 4 of the

LN-VSTAT and LN-PSTAT sensors to the LON

terminals of the controller. Before you insert multiple

wires into any of the terminals on the controller, ensure

you properly twist the wires together.

You can access the LON network with a laptop by

plugging into the communications jack on the

LN-VSTAT with a 1/8 in. audio plug.

Approved cable types for LON communication is Level

IV 22 AWG (0.65 mm), UNSHIELDED. You can use

both one pair and two pair wires. The LON

communication wire is not polarity sensitive and can be

laid out in a bus, star, loop, or free topology network

configuration. For loop topology, polarity is important,

take special care when connecting the LON network to

avoid a short circuit.

Note: The LN-VSTAT and LN-PSTAT sensors do not

have an effect on the network topology for LON

networks.

Note: The Bus topology network configuration allow

for easy network troubleshooting for LON

communication wiring.

Topology Wiring Choices

If the distance between the sensor and the controller

(stub length) is less than 3 meters a bus topology must

be used (Figure 11). If the stub length is greater than 3

meters, a free topology in a daisy-chain manner must

be used (Figure 12).

Note: In Figure 11 and Figure 12, the wire runs from

the two communication terminals of the LN-VSTAT and

LN-PSTAT sensors to the LON/NET terminals of a

controller. When you insert multiple wires into the

terminals, ensure you properly twist the wires together

prior to inserting them into the terminal connectors.

Figure 10: LN-Sensor to an LN-PSTAT Sensor Wiring Details

SMRT+ SMRT-

165432

+--++-

INPUT+

COM

INPUT+

OUTPUT+

(0-10 VDC or 24 VAC)

Com .1Com.2

TO SMRT+

TO SMRT-

OUTPUT-

LN-- SENSOR LN- PSTAT

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions8

Figure 11 shows a bus topology (wired in a daisy chain)

with stub length of less than 3 meters.

Figure 12 shows free topology (with stub) wired in

daisy chain manner.

The wiring scheme in figure is almost identical to a bus

topology network, but since the stub length exceeds 3

meters, it becomes a free topology network which

requires a free topology terminator.

CONTROLLER CONTROLLER CONTROLLER

Bus

Topology

Terminator

Stub Length

< 3 m

Bus

Topology

Terminator

Figure 11: Bus Topology, Stub < 3m

CONTROLLER CONTROLLER CONTROLLER

Free

Topology

Terminator

Stub Length

> 3 m

Figure 12: Free Topology, Stub > 3m

Published in U.S.A. www.johnsoncontrols.com

LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions 9

Controls Group

507 E. Michigan Street

Milwaukee, WI 53202

Metasys® is a registered trademark of Johnson Controls, Inc.

All other marks herein are the marks of their respective owners.

For additional information and detailed explanations on

network topology and wire length restrictions, refer to

Echelon Corporation’s Junction Box and Wiring

Guideline for Twisted Pair LONWORKS Networks

(Part # 005-0023-01).

Note: Use proper network terminators depending on

the type of network topology used. Failure to do so may

result in communication errors between controllers. Do

not use multiple gauges of cable on the same

communication bus, as this may also result in

communication errors.

Troubleshooting

Table 1: Troubleshooting

Problem Possible Cause Solution

Temperature is not read

properly Wrong connection Verify that every connection is properly wired.

Temperature setpoint is not

read properly

Wrong connection Verify that every connection is properly wired.

Software configuration Verify that the setpoint is configured correctly according to

the selected sensor model.

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