Swegon LOCUS a User manual

LOCUS a
Instructions for Use 22/12/2022
The document was originally written in Swedish
Key to symbols
Symbols on the machine
This product complies with applicable EU
directives.
Symbols in this user manual
Warning/Caution!
Contents
Key to symbols............................................................ 1
Application area.......................................................... 2
General....................................................................... 2
Protective equipment .................................................. 2
Electrical safety ........................................................... 2
Handling..................................................................... 2
Installation .................................................................. 2
Assembly ............................................................. 3
Dimensions.......................................................... 3
Connection .......................................................... 4
Modbus...................................................................... 4
Commissioning ........................................................... 4
User mode.................................................................. 5
Component parts ....................................................... 5
Technical data...................................................... 9
Connection................................................................. 9
Standards and directives.................................... 9

LOCUS
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Application area
LOCUS is a setpoint selector switch with built-in temperature
sensor that is used to increase or decrease the setpoint
temperature. It also displays air flows, pressure, VOC CO2
and alarms, and can be used as a configuration tool during
commissioning.
The product may not be used for anything other
than its intended use.
General
Read through the entire instructions for use before
you install/use the product and save the instructions
for future reference. It’s not permissible to make
changes or modifications to this product other than those
specified in this document.
Protective equipment
Always use appropriate personal protective equipment
for the work in question, in the form of gloves,
respirators and protective glasses during handling,
installation, cleaning and service/maintenance.
Electrical safety
Permitted voltage, see “Electrical data”. It is not permissible
to insert foreign objects into the product’s connectors or the
electronics’ ventilation openings; risk for short circuiting.
Cable classification:
Always follow the local/national rules for who are permitted
to carry out this type of electrical installation.
Handling
• The product must be handled with care.
Installation
• Moist, cold and aggressive environments must be
avoided.
• Avoid installing the product near a heat source.
• Assemble the product according to applicable industry
regulations.
• Install the product for easy access during service/
maintenance.
• If the product is mounted above a fixed ceiling, the
inspection hatch must be located so that the product is
accessible for inspection.
• Check to make sure that the product doesn’t have any
visible defects.
• Check that the product is properly secured after it has
been installed.
• Check that all cables are properly secured in place after
installation.

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LOCUS
Assembly
LOCUS should ideally be mounted between 1.5 and 1.8 m
above the floor on the surface of a wall in a standardised
adjusted installation box, see figure 1.
The product can be mounted on top of a connection box
(flush mounting). LOCUS is designed to fit the normal
55x55 mm frames (Schneider Exxact, Merten, Gira, Elko,
etc.).
The installation position needs to be selected with care to
eliminate fault factors that can affect the measurement.
For example, the room unit should not be exposed to:
• direct sunlight
• distance from the user
• air flows from windows and doors
• air flows from ventilation nozzles
• air flows through the junction box
• draughts caused by an external wall
Figure 1. Recommended installation in room.
Figure2. Dimensions, LOCUS.
Figure 3. Dimensions, LOCUS mounting attachment.
Dimensions
1,5-1,8 m
LOCUS
88mm
35mm 88mm
71mm
71mm

LOCUS
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Connection
LOCUS is connected to controller URC1 with the help of RJ12.
Slave loop, port 24 or 25.
Modbus
Modbus settings/Properties
ID: 247
Protocol: RS-485 Modbus RTU
Bus speed/Baud rate: 38400 bit/s
Data bits: 8
Parity: none
Stop bits: 1
Configuration can be performed via the LOCUS panel by
going to the “Parameters” menu.
There, you can access all Modbus settings for the URC
controller.
|1 2 |3 4 |5 6 |7 8 |9 10 11 12 |
|13 14 15 |16 17 18 |19 20 21 |
| 22 | 23 | 24 | 25 |
Figure5. Controller URC1.
Figure4. Room unit LOCUS.
Commissioning
Note: Check all settings and parameters during
commissioning. In this way, you can guarantee that
the selected application will work correctly.

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LOCUS
User mode
A. menu
B. increase
C. swipe left to go to the next page
D. decrease
E. symbol showing cooling or heating in progress
F. shows programmed setpoint or measured temperature
G. shows occupancy in the room
H. press to activate boost flow
AB
C
D
E
F
G
H
Micro SD card reader
RU display
Frame
Mounting attachment
Component parts

LOCUS
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Mark the following parameters:
Display Description Explanation
Display in stand by mode Activated by clicking on the display
Main screen active The + and – signs
increase/decrease the setpoint temperature
Boost mode enabled
Swipe left for display mode two Show input values from connected sensors
Swipe right for display main screen
Main menu
Settings menu Code 1919
Main menu
Display settings
Backlight Brightness in display
Main screen boost Make boost button available
Main screen alarms Show alarms symbol

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LOCUS
Display settings
HMI temp sensor use Use of the unit’s internal temp sensor
Main screen value What to show on main screen
Stand by screen What to show on stand by screen
Modbus settings
Modbus settings For communication with controller unit
Modbus ID ID for LOCUS unit (247)
Stop bits No. of stop bits (1)
Parity Choose parity (None)
Data bits No. of data bits (8)
Baud rate Communication speed (38400)

LOCUS
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Parameter
Parameters Modbus list
Parameter menu Choose Modbus register
Main menu
Thermostat settings Use of temperature sensors
Temp. Calibration Offset of measured value
Main menu
Information SW version

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LOCUS
Standards and directives
The following standards have been observed:
EC Directive: 93/68/EEC
Low Voltage Directive: 2014/35/EU
Machinery Directive: 2006/42/EEC
EMC Directive: 2014/30/EU
RoHS Directive: 2002/95/EC
Vibrations: EN-60721-3-3
Technical data
Connection
LOCUS Connection Description
VDD R J12 12-40 VDC power supply
A+ RJ12 RS-485 bus connection
B- RJ12 RS-485 bus connection
GND RJ12 Earth for 12-40 VDC power supply
Memory card slot The user panel’s software can be
updated via a Micro SD card
Display Capacitive touch TFT Display
QVGA 2.3”
Screen resolution 320 x 240
Communication Modbus RTU via RS-485
Temperature sensor Internal 10K NTC sensor
Operating temperature +5 ... +40°C
Degree of protection IP20
Dimensions 88 x 88 x 35 mm
Operating voltage 12-40 VDC
Current requirement 0.5 W