
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.
| CPU Module | |
|---|---|
| Watchdog Timer | Module, Communication (Programmable) |
| Isolation | |
|---|---|
| Intra-module Isolation | 2500 VDC |
| EMS Protection | |
|---|---|
| EFT (IEC 61000-4-4) | ±4 kV for Power |
| ESD (IEC 61000-4-2) | ±4 kV Contact for Each Terminal ±8 kV Air for Random Point |
| LED Indicators | |
|---|---|
| Status | 1 x Power and Communication |
| Analog Input | |
|---|---|
| Channels | 8 |
| Type | Thermistor |
| Sensor 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 |
| Accuracy | ±1% |
| Sampling Rate | 8 Hz total |
| Overvoltage Protection | 120 VDC |
| Individual Channel Configuration | Yes |
| Open Wire Detection | Yes |
| COM Ports | |
|---|---|
| Ports | 1 x RS-485 |
| Baud Rate | 1200 ~ 115200 bps |
| Data Format | (N, 8, 1), (N, 8, 2), (O, 8, 1), (E, 8, 1) |
| Protocol | DCON, Modbus RTU, Modbus ASCII |
| Power | |
|---|---|
| Reverse Polarity Protection | Yes |
| Consumption | 1 W max. |
| Powered from Terminal Block | 10 ~ 30 VDC |
| Mechanical | |
|---|---|
| Dimensions (mm) | 52 x 98 x 27 (W x L x H) |
| Installation | DIN-Rail Mounting |
| Environment | |
|---|---|
| Operating Temperature | -25 ~ +75 °C |
| Storage Temperature | -30 ~ +75 °C |
| Humidity | 10 ~ 95% RH, Non-condensing |
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