2. ICP DAS USA
  3. tM-TH8

ICP DAS USA tM-TH8, tM-TH8 - 8-channel Isolation Thermistor Input Module, communicates over RS-485, DCON, Modbus RTU, Modbus ASCII. Quick Start

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tM-TH8 8-channel Isolation Thermistor Input Module- QuickStart (Jun/2016)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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tM-TH8
8-channel Isolation Thermistor Input
Module
Quick Start Guide
Product Website:
http://www.icpdas-usa.com/tm_th8.html
http://www.icpdas-usa.com/dcon_utility_pro.html
1. Introduction
The tM-TH8 is an 8-channel isolated thermistor input module that can be used for
measuring temperatures via a thermistor. Many types of thermistors are supported and
user-defined types can be added by specifying the Steinhart coefficients, if necessary.
The added 2500 VDC intra-module isolation and 120 VDC overvoltage protection for the
thermistor on the tM-TH8 ensures that the module will operate with higher reliability.
2. Terminal Assignment
tM-TH8 8-channel Isolation Thermistor Input Module- QuickStart (Jun/2016)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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3. Block/ Wiring Diagram
Use 26-12 AWG wire for signal connections.
Strip the wire to a length of 7±0.5mm.
Use a crimp terminal for wiring.
Avoid high-voltage cables and power equipment as much as possible.
For RS-485 communication, use insulated and twisted pair 24 AWG wire, e.g.
Belden 9841.
4. Default Settings
Default settings for the tM-TH8 are as follows:
▫ Protocol: Modbus RTU
▫ Module Address: 01
▫ Thermistor Type: Type 60, PreCon Type III, -30°F to 240°F
▫ Baud Rate: 9600 bps
▫ Temperature Scale: Celsius (the tM-TH8 also supports Fahrenheit scale)
tM-TH8 8-channel Isolation Thermistor Input Module- QuickStart (Jun/2016)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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5. Configuration
To install the module, follow the steps below:
1. Connect the thermistor analog input.
2. Connect the module to the RS-485 network using the DATA+ and DATA- terminals.
3. Connect the module to the power supply using the +Vs and GND terminals. Note that
the voltage supplied should be in the range of +10 to +30V DC.
tM-TH8 8-channel Isolation Thermistor Input Module- QuickStart (Jun/2016)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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4. Open DCON utility pro
click on COM port(first icon).
It can select multi-options such as Baud Rate, Protocol, Checksum, and Format to
search module. The default settings for the module can be found in Section 3. Click OK
after selecting the COM port setting.
tM-TH8 8-channel Isolation Thermistor Input Module- QuickStart (Jun/2016)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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5. DCON utility pro will search for the selected COM port according the setting
previously set. DCON Utility Pro supports DCON and Modbus protocol for all ICPDAS
and the others modules.
6. Configuration I/O module setting on PC
tM-TH8 8-channel Isolation Thermistor Input Module- QuickStart (Jun/2016)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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7. The Modbus RTU communication protocol is the default protocol of the tM series.
The communication Baud Rates for the Modbus RTU protocol can be in the range of
1200 bps to 115200 bps
8. If user doesn’t know command, user can select Address and ID, it will show some
refer commands as below. User can select necessary command to test or debug
modules.
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