Elseta IOMOD HT Benutzerhandbuch - Seite 6

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Introduction - Features - Device

working information - Supported

MODBUS functions

Introduction

IOMOD HT is used for temperature and humidity data monitoring and relay control over Modbus. Device is also

capable of switching relays automatically (thermostat function) as configured.

Features

• Temperature and humidity sense with ±0,1 % and ±0,1 °C accuracy;

• Temperature sensing range from -10 up to 60 °C;

• Humidity sensing range from 0 to 100%;

• Two Relays which can be configured to turn on automatically on humidity or temperature triggers (only Advanced

version);

• Relays automation configuration over USB or Modbus;

• Configurable Modbus settings, such as Slave ID, Baudrate, Parity and stop bits, RS485 terminating resistor, etc.

• Firmware Upgrade over USB;

• Two connectors for power supply and for RS485, for easier device connection on one line;

Device working information

IOMOD uses Modbus (RTU) protocol over RS485 connection, which can be used with cable length up to 1500 meters

and connect up to 30 devices on one line. Default Modbus settings are: 9600 baudrate, 8N1, Slave address - 1.

To read temperature and humidity, user can use device with default settings without configuring it. To read humidity,

send 04 Modbus command (Read Input Registers) with resolution of first register (0). Returned value will be measured

in % and will be multiplied by 10, to show one decimal place. To read temperature, send 04 (Read Input Registers)

with resolution of second register (1).

Returned value will be measured in °C and will be multiplied by 10. To enable thermostat function, user can configure

device over USB or over MODBUS. Configurable options shown in table below.

CONFIGURABLE OPTIONS

Slave Address

Baudrate

Data, Stop and Parity bits

RS485 Terminating Resistor

Relay active mode

Relay active range

Relay active mode

Relay active range

Default Settings

OVER USB

Yes

OVER MODBUS

Yes