Johnson Controls LIT-12011302 Installation Instructions Manual Download Page 1

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

Summary of Contents for LIT-12011302

Page 1: ... 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 t...

Page 2: ...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 fo...

Page 3: ...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 ...

Page 4: ...ller 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 ...

Page 5: ...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 the sensor to remove the sensor face plate 2 Connect the SMRT and SMRT output terminals of the LN VSTAT sensors to ...

Page 6: ...d LN PSTAT Sensors Installation Instructions 6 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 ...

Page 7: ...work 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...

Page 8: ...r 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 Fi...

Page 9: ... 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...

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