Thermokon FT-RDF18+, Quick Start Manual

Page: 3 / 4

Issue date: 12.05.2022 Page 3 / 4
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 fax: -400 www.thermokon.com· email@thermokon.com
FT-RDF18+_RS485_Modbus_Datasheet_en.docx © 2022
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CONNECTION PLAN
If the RS485 cable is looped through, connect both cable shields using the enclosed 2-pol. Connect terminal as shown.
F RS485 Modbus
Looped through power supply, valid from 08/03/2020 (20216)
UB+
15..35 V = / 19..29 V ~
GND
AOU2
temperature 2* | 0..10 V
AOU1
humidity 1 | 0..10 V
GND
15..35 V = / 19..29 V ~
UB+
A+
RS485
A+
B-
B-
0..5 V
0..10 V
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DIP-SWITCH-SETTINGS
*factory default settings
Termination 120 Ω Modbus adress
Not active*
active
ON=2 0 (1)* ON=2
1
(2) ON=2
2
(4) ON=2
3
(8) ON=2
4
(16)
Baud
Sample adress: 26
9600* 19200 Parity
38400 57600
none*
(2-stopbits)
even
(1-stopbit)
odd
(1-stopbit)
none
(1-stopbit)
The modbus address of the device is set in the range of 1 ... 31 (binary encoded) using a 5-pole DIP switch. With address 0 via DIP, an extended
address range (32..247) is available via USEapp.
Address Access Description Resolution / Unit
1 R
relative humidity 0.1 %rF
Register 400 = 1 (Unit SI) Register 400 = 2 (Unit Imperial)
Address Access Description Resolution / Unit Resolution / Unit
0 R Temperature SI 0.1 °C Imperial 0.1 °F
2 R Absolute humidity SI 0.01 g/m³ Imperial 0.01 Gr/ft³
3 R Enthalpy SI 0.1 kj/kg Imperial 0.1 BTU/lb
4 R Dew point SI 0.1 °C Imperial 0.1 °F
Modbus addresses:
USE-RS485 Modbus Interface
A detailed description of the Modbus addresses can be found under the following link: → Download
ON
1 3 2 4 5
A+
B-
A+
B-