iNetGrow THDIO-G Module

THDIO-G Modules

The THDIO-G is a member of the G-Series (short for “General-purpose”) of modules. The THDIO module contains temperature and relative humidity inputs as well as optically coupled inputs and outputs.

The configuration dialog organizes the settings under several tabs. Common to many tabs are check boxes to indicate whether the input or output is used, and buttons to set or get their current values. The buttons named “Refresh” makes the necessary sensor readings and conversions before the value is displayed. You must apply any changes in the configuration by clicking on the “Apply” button before you may view the values.

Module information

You may give the module a more meaningful name by typing it in the text box and clicking the “Apply” button. A window shows module information, such as its hardware ID (HID) and version.

Temperature inputs

The THDIO-G modules use iNetGrow TH-SP (Gold or Silver) probes. These digital combined temperature and relative humidity sensors require no calibration. The module supports two probes. Select the units to be Fahrenheit or Celsius.

Relative humidity inputs

Inputs

The inputs are optically coupled. You must supply a 5-24V DC or AC signal to the inputs. The “Active Low” box determines if the input is considered on (active) when a signal is applied or not. If the “Active Low” box is unchecked, then the input reads “ON” or active when an input signal is applied. If the box is checked, then the input reads “ON” or active when the input signal is removed (see schematic).

Outputs

The outputs are optically coupled. They can withstand up to 36 V AC or DC when off and conduct a continuous current up to 250 mA (750 mA surge). In this sense, they replace a dry contact (switch). The two buttons “Default on” and “Default off” determine the state of the output when the system resets. For example, immediately after power is applied, the state of the output is this default state (see schematic).

Alarms

The THDIO-G module has a beeper. You may turn off the beeper by un-checking the box. You may also manually turn the beeper on or off. This is sometimes a handy tool to identify a module among many others.

Names

The names given to the inputs and outputs are important. The controller identifies the inputs and outputs not by their module number but by their name. The controller needs to access these inputs and outputs when it logs data, or when it performs automated tasks. Refer to the topic “Named Variables” in the main help files for more information.