verified connector library

Thermokon FTA54+ RH/temp sensor

Register map(s) for this device, each at the trust rung it earned. Addresses are 0-based as on the wire. Word order and scaling are confirmed at the hardware-verified rung and at no rung below it.

interop-verified

Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.

pointaddress (0-based)typescaleunit
uni_firmware0I161
uni_device_location1I161
uni_offset_temperature5I160.01K
uni_offset_relative_humidity6I160.01%
uni_relative_humidity585I160.1%
uni_temperature_c587I160.01°C
uni_temperature_f588I160.01°F
use_temperature0I160.1
use_relative_humidity1I160.1
use_offset_temperature100I160.1K
use_offset_relative_humidity101I160.1%rH
use_unit_system400I161
use_firmware_version503I161

link settings as documented (unverified): RTU/ASCII; default 9600 8E1; unit ID 1; When using ASCII mode, parity must be set to EVEN or ODD. 'No Parity' (no) is not available in ASCII mode. Register addressing mode (UNI or USE) is selectable via DIP switch 2.6.

⚠ The product should only be used for the intended application. Unauthorised modifications are prohibited! The product must not be used in relation with any equipment that in case of a failure may threaten, directly or indirectly, human health or life or result in danger to human beings, animals or assets. Ensure all power is disconnected before installing. Do not connect to live/operating equipment. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)
terminalsremovable plug-in terminal, max. 14AWG
A/B polarityIn case of reversed polarity at one field device, a supply voltage short-circuit would be caused by that device.
connectorremovable plug-in terminal
wiring notesCable entry Flextherm M20, for wire max. Ø=0.18..0.35 in., removable
protocol notesRegister compatibility to USE (Valid from firmware version 1.4, Jan. 2020). Via dipswitch 2.6 it is possible to change between the previous register addressing of the UNI-Modbus board to a USE compatible register assignment.
firmware register0 (Variant 1) or 503 (Variant 2)
identification notesFirmware version is available at register 0 in UNI-Modbus mode or register 503 in USE-Modbus mode.
power15..24 V = (±10%) (or 24 V ~ (±10%))* SELV, max. 0,7 W (24 V =) | 1,8 VA (24 V ~)
environmentAmbient condition -4..+158 °F, short term condensation. IP65 according to EN 60529
accuracyAccuracy temperature ±0,3 K (typ. at 70 °F), Accuracy humidity ±2% between 10..90% rH (typ. at 70 °F)
certificationsCE
doc revision05/21/2026 • A160
firmware applicabilityValid from firmware version 1.4, Jan. 2020
field reports — community-sourced, unverified (checked 2026-06-11)
  • confirmed: Baud rates [9600, 19200, 38400, 57600] and default baud rate 9600 — confirmed by Thermokon FTA54+ Basic RS485 Modbus Datasheet
  • confirmed: Default Unit ID is 1 — confirmed by Thermokon FTA54+ Basic RS485 Modbus Datasheet
  • confirmed: ASCII mode requires EVEN or ODD parity, No Parity is not available in ASCII mode — confirmed by Thermokon FTA54+ Basic RS485 Modbus Datasheet
  • confirmed: Register addressing mode (UNI or USE) is selectable via DIP switch 2.6 — confirmed by Thermokon FTA54+ Basic RS485 Modbus Datasheet
  • confirmed: Accuracy temperature ±0,3 K (typ. at 70 °F), Accuracy humidity ±2% between 10..90% rH (typ. at 70 °F) — confirmed by Thermokon FTA54+ Basic RS485 Modbus Datasheet (US version)
  • confirmed: Power supply 15..24 V = (±10%) or 24 V ~ (±10%) SELV, max. 0,7 W (24 V =) | 1,8 VA (24 V ~) — confirmed by Thermokon FTA54+ Basic RS485 Modbus Datasheet
  • confirmed: Ambient condition -4..+158 °F, short term condensation, IP65 according to EN 60529 — confirmed by Thermokon FTA54+ Basic RS485 Modbus Datasheet
  • confirmed: Reversed polarity at one field device causes a supply voltage short-circuit — confirmed by Thermokon FTA54+ Basic RS485 Modbus Datasheet

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

If your device isn't here, upload its register map. Generation is free, and the connector keeps the rung it earns under testing.

To prove a connector against your own device, order hardware verification. If it doesn't verify, you don't pay.

Platform builders can license the verified library: machine-readable maps, the firmware matrix, API access.