Thermocouple module selection
Choose UF20-4TC for four thermocouple inputs or UF20-8TC for eight. Both models support K, J, T, E, N, S, R, B and C sensors, two-wire connections and internal or external cold junction compensation.
| Model | Channels | Process data | System feed current |
|---|
| UF20-4TC | 4 | 8 bytes | <70mA |
| UF20-8TC | 8 | 16 bytes | <100mA |
Measurement and signal handling
| Characteristic | Both models |
|---|
| Sensor category | Thermocouple |
|---|
| Sensor types | K, J, T, E, N, S, R, B, C |
|---|
| Sensor wiring | Two-wire |
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| Cold junction compensation | Internal and external; accuracy ≤3K |
|---|
| Resolution | 16 bits; 0.1°C per count |
|---|
| Precision | ±0.5% |
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| Temperature coefficient | ≤50ppm/K |
|---|
| Module measuring range | -100°C to +2320°C |
|---|
| Interference suppression frequencies | 10Hz, 50Hz, 60Hz and 400Hz |
|---|
| Reverse protection | Supported |
|---|
| Isolation method | Magnetic isolation |
|---|
| Fault diagnostics | Supported |
|---|
| Diagnostic conditions | Sensor disconnection and parameter assignment errors |
|---|
The overall module measuring range does not apply in full to every thermocouple type. Select the sensor and its usable temperature range for the measurement required.
Power, wiring and installation
| Characteristic | Both models |
|---|
| Operating voltage | 24V DC, +20%/-15% |
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| Connection method | Push-in terminal blocks |
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| Conductor cross-section | 0.34-1.5mm² |
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| Conductor size | AWG22-AWG16 |
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| Stripping length | 8-10mm |
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| Height × width × depth | 75mm × 12mm × 105mm |
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| Mounting | 35mm DIN rail |
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| Ingress protection | IP20 |
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| Operating temperature | -10°C to +55°C |
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| Storage temperature | -20°C to +85°C |
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| Relative humidity | 5-95%RH, non-condensing |
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