Ascon tecnologic TRH04 User manual

Ascon Tecnologic - TRH04 - USER MANUAL - PAG. 1
TRH04
HUMIDITY AND TEMPERATURE
SENSOR WITH
RS485 INTERFACE
User manual
22/10 - Code: ISTR_M_TRH04_E_01_--
ASCON TECNOLOGIC S.r.l.
Viale Indipendenza 56, 27029 - VIGEVANO (PV) ITALY
TEL.: [phone] - FAX: [phone]
sito: http:\\www.ascontecnologic.com
e-mail: [email protected]
PREFACE
D This manual contains the information necessary for the
product to be installed correctly and also instructions for
its maintenance and use; we therefore recommend that
the utmost attention is paid to the following instructions
and to save it.
This document is the exclusive property of Ascon Tecnologic
S.r.l. which forbids any reproduction and divulgation, even par-
tially, of the document, unless expressly authorized.
Ascon Tecnologic S.r.l. reserves the right to make any formal or
functional changes at any moment and without any notice.
Ascon Tecnologic S.r.l. and its legal representatives do not
assume any responsibility for any damage to people, things or
animals deriving from violation, wrong or improper use or in
any case not in compliance with the instrument features.
D Whenever a failure or a malfunction of the device may
cause dangerous situations for persons, thing or animals,
please remember that the plant has to be equipped with
additional devices which will guarantee safety.
1. INSTRUMENT DESCRIPTION
1.1 General description
The TRH04 temperature/humidity sensor uses the standard
MODBUS-RTU RS485 protocol, easily accessible by PLCs,
DCS and other instruments or systems for temperature and
relative humidity monitoring.
TRH04 uses a high-precision sensor and its conversion/re-
transmission devices are of quality to ensure high reliability
and excellent long-term stability.
2. USAGE WARNINGS
2.1 Admitted usage
D The instrument has been projected and manufactured
as a measuring and control device to be used accord-
ing to EN60730-1 at altitudes operation below 2000 m.
Using the instrument for applications not expressly permitted
by the above mentioned rule must adopt all the necessary
protective measures.
The instrument must not be used in dangerous environ-
ments (flammable or explosive) without adequate protections.
D The installer must ensure that the EMC rules are
respected, also after the instrument installation, if
necessary using proper filters.
3. INSTALLATION WARNINGS
3.1 Mounting requirements
Select a mounting location having the following characteristics:
• It should be easily accessible;
• It must not be subjected to vibrations or impacts;
• Must be free from corrosive gases;
• Must be free from water or other fluids (condensation).
3.2 Dimensions (mm)
3.2.1 TRH04
77
15
3.2.2 Mounting bracket

Ascon Tecnologic - TRH04 - USER MANUAL - PAG. 2
3.3 Connections
General notes on electrical connections
• The probe cables must be kept separated from high
power voltage wiring;
• If shielded cables are used, the protection shield must be
connected to ground at one side only.
3.3.1 Electrical wiring
Colour Connection
Red Power supply - Positive pole
Green Power supply - Negative pole
Yellow Terminal A+ RS485
Blue Terminal B- RS485
3.4 Communication protocol
The product uses the standard RS485 MODBUS-RTU proto-
col format, all operating and response commands are made
up of hexadecimal data.
When the sensor is shipped, the RS485 communication set-
tings are:
• Modbus Address: 1;
• Baud rate: 9600
• Data bits: 8;
• Parity: n (no parity);
• Bit di stop: 1.
3.4.1 Variables Map
Address Descrizione no. of
decimals R/W
Dec. Hex.
0 00 Measured Temperature 2 R
1 01 Measured Humidity 2 R
102 066 Modbus Address 0 R/W
103 067
Baud rate
1 2400
2 4800
3 9600
4 19200
5 38400
6 115200
0 R/W
107 06B Temperature offset (-10 ÷ +10) 2 R/W
108 06C Humidity offset (-10 ÷ +10) 2 R/W
4. PROBLEMS AND MAINTENANCE
4.1 Cleaning
We recommend to clean the instrument with a slightly wet
cloth using water and not abrasive cleaners or solvents only.
Should it be necessary to remove the sensor, avoid to me-
chanical stress it and in particular avoid touching the humid-
ity sensor.
4.2 Disposal
The appliance (or the product) must be
disposed of separately in compliance
with the local standards in force on
waste disposal.
5. WARRANTY AND REPAIRS
The instrument is under warranty against manufacturing
flaws or faulty material, that are found within 18 months from
delivery date. The warranty is limited to repairs or to the
replacement of the instrument.
The eventual opening of the housing, the violation of the instru-
ment or the improper use and installation of the product will
bring about the immediate withdrawal of the warranty effects.
In the event of a faulty instrument, either within the period of
warranty, or further to its expiry, please contact our sales de-
partment to obtain authorisation for sending the instrument
to our company.
The faulty product must be shipped to Ascon Tecnologic with
a detailed description of the faults found, without any fees or
charge for Ascon Tecnologic, except in the event of alterna-
tive agreements.
6. TEHNICAL DATA
6.1 Technical characteristics
Temperature range: -30 ÷ 80°C;
Temperature accuracy: ±0.5°C @ 25°C;
Humidity range: 0 ÷ 100% RH;
Humidity accuracy: ±3% RH @ 25°C;
Communication interface: RS 485;
Default data format: 9600, 8, n, 1;
Power supply: 6 ÷ 24 VDC;
Operating temperature -40 ÷ 80°C;
Operating Humidity 5 ÷ 90% RH;
Standard connection cable length: 1 m.