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tM-TH8 - 8-channel Isolation Thermidtor Input Module with High Voltage Protection
by ICP DAS
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8-channel Isolation Thermistor Input Module with High Voltage Protection. Communicable over RS-485, DCON, Modbus RTU, Modbus ASCII. Supports operating temperatures between -25°C ~ +75°C (-13F ~ 167F).
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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.
- 8-channel Thermistor Input
- 120 VDC Overvoltage Protection
- Resolution: 16 bits
- User-defi ned Thermistor Types
- 2 kV ESD and 4 kV EFT Protecton
- Dual Watchdog
- 2500 VDC Intra-module Isolation
- Wide Operating Temperature Range: -25 ~ +75°C
I/O Specifications
| Analog Input |
| Input Channels |
8 |
| Types |
Thermistor |
| Thermistor Type |
Precon ST-A3, Fenwell U, YSI L100, YSI L300, YSI L1000, YSI B2252, YSI B3000,
YSI B5000, SI B6000, YSI B10000, YSI H10000, YSI H30000, User-defined |
| Resolution |
16-bit |
| Sampling Rate |
8 Hz total |
| Accuracy |
+/-1% |
| Overvoltage Protection |
120 VDC |
| Open Wire Detection |
Yes |
System Specifications
| Communication |
| Interface |
RS-485 |
| Format |
(N, 8, 1), (N, 8, 2), (O, 8, 1), (E, 8, 1) |
| Baud Rate |
1200 ~ 115200 bps |
| Protocol |
DCON, Modbus/RTU, Modbus/ASCII |
| Dual Watchdog |
Yes, Module (2.3 seconds), Communication (Programmable) |
| LED Indicators |
| Power |
1 LED as Power Indicator |
| Isolation |
| Intra-module Isolation, Field-to-Logic |
2500 VDC |
| EMS Protection |
| ESD (IEC 61000-4-2) |
2 kV Contact for Each Terminal |
| 3 kV Air for Random Point |
| EFT (IEC 61000-4-4) |
+/-4kV for Power |
| Power Requirements |
| Reverse Polarity Protection |
Yes |
| Powered from Terminal Block |
Yes, 10 ~ 30 VDC |
| Consumption |
1 W Max. |
| Mechanical |
| Dimensions (W x L x H) |
52 mm x 98 mm x 27 mm |
| Installation |
DIN-Rail Mounting |
| Environment |
| Operating Temperature |
-25 XC ~ +75 °C |
| Storage Temperature |
-30 XC ~ +75 °C |
| Humidity |
10 ~ 95% RH, Non-condensing |
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