WIKA SENSeOR HTR02 User manual

24/7 ASSET MONITORING SOLUTION
HTR02 USER MANUAL
Document revision: UM00014EN-AF
Date: 2023-08
SENSeOR (head office)
Bâtiment Natura 2
1198, avenue du Docteur
Maurice Donat
06250 Mougins
France
Contact address:
[e-mail]
Regional distributors
Visit
www.senseor.com for
the latest distribution
locations.

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 2/30
www.senseor.com
WARRANTY
These products are warranted to be free from functional defects in material and in workmanship at
the time of the manufacturing and to conform at that time to the specifications set forth in the
relevant instruction manuals or in the data sheets, for such products for a period of one year.
Reference SENSeOR terms and conditions provided at time of purchase for complete warranty details.
SENSeOR (head office)
Bâtiment Natura 2
1198, avenue du Docteur Maurice Donat,
06250 Mougins
France
SENSeOR reserves the right to make technical changes or to modify the content of this document
without prior notice.
SENSeOR is not responsible for errors or for possible lack of information in this document.
All rights reserved. No part of this document may be reproduced, distributed, or transmitted in any
form or by any means, including photocopying, recording, or other electronic or mechanical methods,
without the prior written permission of SENSeOR, except in the case of brief quotations embodied in
critical reviews and certain other non-commercial uses permitted by copyright law.
Copyright © 2023, SENSeOR

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 3/30
www.senseor.com
TABLE OF CONTENTS
WARRANTY.............................................................................................................................................. 2
TABLE OF CONTENTS............................................................................................................................... 3
SAFETY INSTRUCTIONS............................................................................................................................ 5
1.0 CONVENTIONS......................................................................................................................... 5
1.1 SAFETY INFORMATIONS .......................................................................................................... 6
OVERVIEW............................................................................................................................................... 7
1.0 RELATED DOCUMENTS ............................................................................................................ 7
1.1 AVAILABLE PRODUCTS............................................................................................................. 7
1.2 INSTRUCTIONS FOR USE.......................................................................................................... 8
1.3 READER OVERVIEW ................................................................................................................. 9
1.3.1 SERIALIZATION LABEL...................................................................................................... 9
1.3.2 FRONT LABEL ................................................................................................................... 9
1.4 CONNECTORS AND FUNCTIONS ............................................................................................ 10
1.4.1 INPUT POWER (MAIN CONNECTOR) ............................................................................. 10
1.4.2 RS485 PORTS ................................................................................................................. 11
1.4.3 ENVIRONMENTAL SENSOR............................................................................................ 11
1.4.4 ANALOG INPUTS/OUTPUTS (FRONT SELF-TIGHTENING CONNECTOR)......................... 12
1.4.5 RF ANTENNAS................................................................................................................ 12
1.5 STATUS LED............................................................................................................................ 13
INSTALLATION ....................................................................................................................................... 14
1.6 UNPACKING........................................................................................................................... 15
1.6.1 PHYSICAL DIMENSIONS ................................................................................................. 15
1.7 DIN RAIL MOUNTING............................................................................................................. 16
1.7.1 READER EMPLACEMENT................................................................................................ 17
1.7.2 RECOMMENDED SPACING............................................................................................. 17
WIRING.................................................................................................................................................. 18
1.8 POWER................................................................................................................................... 18
1.8.1 INPUT POWER................................................................................................................ 18
1.8.2 INTERNAL BATTERY ....................................................................................................... 19
1.9 COMMUNICATION CONNECTIONS........................................................................................ 20
1.9.1 CABLING FOR RS485 COMMUNICATION....................................................................... 20
1.9.2 BUS RESISTIVE TERMINATION ....................................................................................... 20
1.9.3 BUS DATA RATE ............................................................................................................. 21
1.9.4 BUS LENGTH .................................................................................................................. 21

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 4/30
www.senseor.com
1.9.5 NUMBER OF READERS................................................................................................... 21
1.9.6 MODBUS-RTU DEFAULT CONFIGURATION.................................................................... 21
1.9.7 CABLING FOR ETHERNET COMMUNICATION................................................................ 22
1.10 ENVIRONMENTAL SENSOR CONNECTION............................................................................. 23
SYSTEM INSTALLATION & CONFIGURATION ......................................................................................... 24
1.11 SAW TEMPERATURE SENSORS INSTALLATION...................................................................... 24
1.12 SYSTEM CONFIGURATION ..................................................................................................... 24
SYSTEM INTEGRATION .......................................................................................................................... 25
1.13 MODBUS REGISTERS.............................................................................................................. 25
CERTIFICATIONS .................................................................................................................................... 30
1.14 CERTIFICATIONS .................................................................................................................... 30
1.15 MARKING............................................................................................................................... 30

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 5/30
www.senseor.com
SAFETY INSTRUCTIONS
IT IS IMPORTANT TO READ THIS MANUAL BEFORE INSTALLING OR COMMISSIONING SENSEOR ASSETS
MONITORING SYSTEM.
1.0 CONVENTIONS
DANGER
DANGER INDICATES AN IMMINENTLY HAZARDOUS SITUATION, WHICH, IF NOT AVOIDED, WILL RESULT
IN DEATH OR SERIOUS INJURY.
FAILURE TO FOLLOW THE INSTRUCTIONS GIVEN WILL RESULT IN DEATH OR SERIOUS INJURY.
WARNING
WARNING INDICATES A POTENTIALLY HAZARDOUS SITUATION, WHICH, IF NOT AVOIDED, COULD
RESULT IN DEATH OR SERIOUS INJURY.
FAILURE TO FOLLOW THE GIVEN INSTRUCTIONS CAN RESULT IN DEATH OR IN SERIOUS INJURY.
CAUTION
CAUTION INDICATES A POTENTIALLY HAZARDOUS SITUATION, WHICH, IF NOT AVOIDED, MAY RESULT
IN MINOR OR MODERATE INJURY.
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN PERSONAL INJURY.
NOTICE
NOTICE PROVIDES GUIDANCE ON DAMAGE UNRELATED TO PERSONAL INJURY, SUCH AS THOSE THAT
CAN CAUSE DETERIORATED PROPERTY.
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN PROPERTY DAMAGE.
IMPORTANT
IMPORTANT INDICATES ADDITIONAL INFORMATION ABOUT MAKING EFFECTIVE USE OF THIS
PRODUCT.

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 6/30
www.senseor.com
1.1 SAFETY INFORMATIONS
►Protect product from moisture and humidity.
►Protect product from too high or too low temperature.
►Protect product from fire.
►Do not paint the product.
►Do not modify or disassemble the product. Service must be carried out by SENSeOR.
►Store products in dry and dust-free place.

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 7/30
www.senseor.com
OVERVIEW
CAUTION
THIS READER IS DEDICATED TO SWITCHGEAR MONITORING WITH WIRELESS PASSIVE SAW
TEMPERATURE SENSORS, ENVIRONMENTAL SENSOR AND UHF PARTIAL DISCHARGE DETECTION. IT IS
DESIGNED FOR USE INSIDE METALLIC CAVITIES ONLY LIKE THE SWITCHGEAR CABINET AND TUNED TO
BE COMPLIANT WITH IEC 62271 ENABLING A LICENSE-FREE USE IN SWITCHGEAR WORLDWIDE.
1.0 RELATED DOCUMENTS
-UM00013EN-AG: SENSeOR Configuration Tool for HTR02 User Manual.
-SD00184EN-AC: HTR02 readers Datasheet.
For additional related documentation and file downloads see support website at
senseor.com/downloads.
1.1 AVAILABLE PRODUCTS
This manual covers the following products:
-HTR02-2AWS: Temperature monitoring only.
-HTR02-6AWS: Temperature monitoring only.
-HTR02-6AWS-PDD: Temperature & partial discharge monitoring.

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 8/30
www.senseor.com
1.2 INSTRUCTIONS FOR USE
The HTR02 reader is dedicated to monitor electrical equipment like switchgears. The temperature of
live conductors is measured by SAW sensors and prevent overheating and overload. Partial discharges
are measured by antenna pairs and prevent equipment failure. Ambient temperature and humidity
measurements are also available through an optional environmental sensor connected with wires to
the reader.
The reader is intended to be installed in low voltage compartments of switchgear or in similar type of
assets. It can also be installed in a weatherproof environmental enclosure.
The reader is intended for use at a maximum altitude of 5 km, typically between -20°C to +70°C (refer
to reader specification for the complete specification) and between 10% to 95% non-condensing
relative humidity.
WARNING
THE READER IS NOT INTENDED FOR INSTALLATION INTO MEDIUM OR HIGH VOLTAGE COMPARTMENT
ASSETS. ONLY SAW TEMPERATURE SENSORS, ENVIRONMENTAL SENSOR AND RF ANTENNAS ARE
INTENDED FOR INSTALLATION INTO MEDIUM VOLTAGE COMPARTMENTS.

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 9/30
www.senseor.com
1.3 READER OVERVIEW
Included in scope of delivery:
-1x HTR02 reader.
-1x µSD card.
-1x 4-pin power connector.
-1x 4-pin environmental sensor connector (for HTR02-6AWS readers).
1.3.1 SERIALIZATION LABEL
Figure 1: HTR02-6AWS-PDD reader serialization label
1.3.2 FRONT LABEL
Figure 2: HTR02-2AWS front product label Figure 3: HTR02-6AWS front product label

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 10/30
www.senseor.com
1.4 CONNECTORS AND FUNCTIONS
Status led
µSD card reader
Alarm acknowledgement push button
Ethernet RJ45 connector
RS485 Modbus RJ45 connectors
Analog inputs/outputs connector
Power input connector
Ambient temperature and humidity probe connector
RF SMB connectors of antenna pairs (only one antenna pair available for HTR02-2AWS)
1.4.1 INPUT POWER (MAIN CONNECTOR)
Pin
Type
Description
1 (left)
GND SUPPLY
Ground
2
GND
Ground (not used)
3
+24VDC
Main power supply input
4 (right)
GND
Ground (not used)
CAUTION
DO NOT REVERSE THE POWER SUPPLY POLARITY, THIS MAY CAUSE ELECTRICAL DAMAGE.

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 11/30
www.senseor.com
1.4.2 RS485 PORTS
RJ45 ports for Modbus-RTU communication.
Pin
Type
Description
1 (left)
-
Not used
2
-
Not used
3
-
Not used
4
A
Data +
5
B
Data -
6
-
Not used
7
-
Not used
8 (right)
GND
Ground
1.4.3 ENVIRONMENTAL SENSOR
Pin
Type
Description
1 (left)
TEMP IN
4–20 mA input for temperature sensor
2
HUM IN
4–20 mA input for humidity sensor
3
GND
Ground
4 (right)
GND
Ground
Figure 5: Environmental sensor socket pinout
NOTE
THIS CONNECTOR IS ONLY AVAILABLE FOR HTR02-6AWS-PDD READERS.
Figure 4: RS485 socket pinout

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 12/30
www.senseor.com
1.4.4 ANALOG INPUTS/OUTPUTS (FRONT SELF-TIGHTENING CONNECTOR)
Pin
Type
Description
1 (top)
TRIG OUT
Alarm relay activation output
2
I IN
4–20 mA input
3
SYNC IN
Digital input
4
I OUT
4–20 mA output
5 (bottom)
V OUT
0–10V output
Figure 6: Analog I/Os socket pinout
1.4.5 RF ANTENNAS
Connector
Type
Description
1A
1A
RF antenna 1A
1B
1B
RF antenna 1B
2A
2A
RF antenna 2A (only for HTR02-6AWS)
2B
2B
RF antenna 2B (only for HTR02-6AWS)
3A
3A
RF antenna 3A (only for HTR02-6AWS)
3B
3B
RF antenna 3B (only for HTR02-6AWS)
Figure 7: RF antennas

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 13/30
www.senseor.com
1.5 STATUS LED
Status LED is used to indicate the functional state of reader.
Description
LED status
No power
Installation mode
Configuration mode
Measure mode (SAW & partial discharge)
SAW measurements demonstration mode
PDD measurements demonstration mode
Warning threshold reached
Alert threshold reached
System error
Figure 8: Status led

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 14/30
www.senseor.com
INSTALLATION
IMPORTANT
THE INSTALLATION INSTRUCTIONS ARE ONLY FOR THE HTR02 READER.
IT IS ASSUMED THAT SAW TEMPERATURE SENSORS AND PARTIAL DISCHARGE PROBE ANTENNAS HAVE
BEEN CONFIGURED AND INSTALLED.
WARNING
PROFESSIONAL INSTALLATION REQUIRED.
INSTALLATION AND CONFIGURATION SHOULD BE PERFORMED ONLY BY USERS WHO ARE
TECHNICALLY COMPETENT AND AUTHORIZED TO DO SO.
LOCAL REGULATIONS REGARDING ELECTRICAL INSTALLATION AND SAFETY MUST BE OBSERVED.
FAILURE TO FOLLOW THE GIVEN INSTRUCTIONS CAN RESULT IN DEATH OR IN SERIOUS INJURY.
WARNING
THE USE OF THIS EQUIPMENT IN A MANNER NOT SPECIFIED IN THIS MANUAL OR BY THE
MANUFACTURER MAY IMPAIR PROTECTION OF THE USER AND EQUIPMENT.
CAUTION
THIS EQUIPMENT IS DESIGNED FOR INSTALLATION IN AN ENCLOSURE THAT PROVIDES ADEQUATE
PROTECTION AGAINST ELECTRICAL SHOCK.

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 15/30
www.senseor.com
1.6 UNPACKING
1.6.1 PHYSICAL DIMENSIONS
Product
Dimensions
HTR02-2AWS
45 x 99 x 117 mm
HTR02-6AWS(-PDD)
68 x 99 x 117 mm
Figure 9: Readers dimensions views

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 16/30
www.senseor.com
1.7 DIN RAIL MOUNTING
CAUTION
ENSURE THAT THE LOW-LEVEL COMPARTMENT WHERE THE READER IS MOUNTED IS SUFFICIENTLY
VENTILATED TO PREVENT OVERHEATING. THE DEVICE MUST BE ELECTRICALLY GROUNDED FOR EMC
COMPLIANCE.
The reader is designed for installation on a grounded 35 mm DIN rail. DIN rail fixation is integrated on
its rear enclosure.
Figure 10: DIN rail fixation

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 17/30
www.senseor.com
1.7.1 READER EMPLACEMENT
The reader is intended to be installed in the low voltage compartment of the switchgear. The other
electrical assets are recommended to be weather protected in an enclosed location.
The reader is required to be installed within a maximum distance of 10 meters from the antennas,
corresponding to the maximum length of the antenna coaxial cable for SAW temperature sensors and
partial discharge measurement.
1.7.2 RECOMMENDED SPACING
For connectors access, it is recommended to leave the minimum clearance for front and bottom panels
of 5 cm (2 inches).
5 cm
5 cm
5 cm
5 cm
Figure 11: Reader emplacement in switchgear
Figure 12: Reader access clearance

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 18/30
www.senseor.com
WIRING
1.8 POWER
The reader power connector is a 2-pin male connector. This screw connector supports from 16 to 26
AWG wires. For stranded conductor use connector ferrules on the termination.
1.8.1 INPUT POWER
The reader operates at 24VDC nominal with a total power consumption of 6 Watts maximum.
SENSeOR recommends the use of a DC power supply in the same low-voltage compartment as the
reader. It is possible to run a DC power bus to power multiple readers from one DC power supply.
However, this option requires a careful consideration of the wire diameter, AC/DC and circuit breaker
capabilities.
Power connections are recommended to be at a minimum of 16 AWG.
If bussed power is being considered, the wire gauge must be selected to prevent excessive voltage
drop between the DC power source and the reader that is electrically farthest from the source.
The following block diagram outlines the recommended power wiring for the reader with a 2-pole
circuit breaker and an AC/DC power supply. Surge suppression devices can also be installed between
the input line and the neutral only if higher safety rating is required.
Figure 13: Connector ferrule
Figure 14: Reader power cabling

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 19/30
www.senseor.com
1.8.2 INTERNAL BATTERY
SENSeOR reader has an internal 3VDC non rechargeable battery to keep the UTC date and the time in
case of power down. Battery needs to be replaced if voltage value is under 2.7V.
It can be replaced only by authorized person using the following or an equivalent reference:
1.8.2.1 Battery replacement procedure
►Disconnect all the HTR02 reader connections (antennas, environmental sensor, analog I/Os and
power supply).
►Extract the reader from its location on the DIN rail.
►Using a flat screwdriver, open the rear plastic enclosure by pressing the clips above and under the
reader.
►Remove the electronic card from the rear enclosure.
►Identify and replace the CR1632 battery by carefully respecting its polarity.
►Reinsert the electronic card in the enclosure.
►Reclip the rear plastic enclosure.
►Reposition the reader on its location on the DIN rail.
►Reconnect all the HTR02 reader connections (antennas, environmental sensor, analog I/Os and
power supply).
WARNING
THERE IS A RISK OF EXPLOSION IF THE BATTERY IS REPLACED BY AN INCORRECT TYPE.
BE CAREFUL OF USED BATTERY IN ACCORDANCE WITH YOUR REGIONAL LEGAL INSTRUCTIONS.
Figure 15: 3V Lithium CR1632 battery

24/7 ASSET MONITORING SOLUTION UM00014EN-AF
SENSeOR HTR02 User Manual 20/30
www.senseor.com
1.9 COMMUNICATION CONNECTIONS
The components are used to connect Modbus devices, energy communication systems and industrial
equipment with each other and to SCADA or cloud systems.
The reader could be connected to a network using RS485 Modbus-RTU or Ethernet Modbus-TCP.
1.9.1 CABLING FOR RS485 COMMUNICATION
SENSeOR recommends the use of shielded cable for the RS485 wiring, providing at least one twisted
pair, one single line, and a drain wire. Although, a typical recommended cable has two twisted pair.
The twisted pair provides DATA ± signals to each reader while the single line would be for D-COM,
providing a low-impedance return for each reader.
Figure 16: RS485 daisy chaining
1.9.2 BUS RESISTIVE TERMINATION
The RS485 bus needs to be terminated at each end with a 120 Ohms resistor when long stretches of
cable are used. This ensures that the bus has the correct impedance.
However, if the bus length is less than 2% of its maximum (20 meters at 9 600 bauds), the termination
resistor may be omitted.
In general, RS485 adapters and master bus provide the source impedance internally and should be
located at one end of the bus. If not, use this pinout to cable the resistor.
Pin
Type
Description
1 (left)
-
Not used
2
-
Not used
3
-
Not used
4
120 Ohms
Resistance pin 1
5
120 Ohms
Resistance pin 2
6
-
Not used
7
-
Not used
8 (right)
-
Not used