Four thermocouple inputs
The UE20-4TC accepts four two-wire thermocouple inputs and transfers eight bytes of process data. It provides 16-bit resolution with 0.1°C increments, internal or external cold junction compensation, magnetic isolation and fault diagnostics.
Measurement and sensor selection
| Characteristic | UE20-4TC |
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| Sensor category | Thermocouple |
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| Sensor types | K, J, T, E, N, S, R, B and C |
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| Channels | 4 |
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| Process data | 8 bytes |
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| Sensor connection | Two-wire |
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| Cold junction compensation | Internal and external; accuracy ≤3K |
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| Resolution | 16 bits; 0.1°C per count |
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| Precision | ±0.5% |
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| Temperature coefficient | ≤50ppm/K |
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| Module measuring range | -100°C to +2320°C |
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| Interference suppression frequencies | 10Hz, 50Hz, 60Hz and 400Hz |
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| Reverse protection | Supported |
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| Isolation | Magnetic isolation |
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| Fault diagnostics | Supported |
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| Diagnostic conditions | Sensor disconnection and parameter assignment errors |
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The module measuring range is an overall limit. Select the thermocouple type and sensor for the required temperature range; individual sensor types do not all cover the full module range.
Supply and terminal wiring
| Characteristic | Specification |
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| Operating voltage | 24V DC, +20%/-15% |
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| System feed current | <70mA |
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| Connection method | Spring terminal blocks |
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| Conductor cross-section | 0.2-2.5mm² |
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| AWG conductor range | AWG28-AWG14 |
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| Stripping length | 8-9mm |
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Installation and environment
| Characteristic | Specification |
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| Height × width × depth | 100mm × 12mm × 68mm |
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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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