The 1746‑NR4 is a 4‑channel isolated RTD/resistance input module for the SLC 500 system. It accurately measures temperature and resistance, supports multiple RTD types, and provides stable, isolated analog input for industrial process monitoring and control.
| Item | Specification |
|---|---|
| Model | 1746-NR4 |
| Series | SLC 500 |
| Module Type | 4-Channel Isolated RTD / Resistance Analog Input Module |
| Input Channels | 4 isolated channels; supports 2-wire, 3-wire, 4-wire RTD |
| Supported RTD Types | Pt100/Pt200/Pt500/Pt1000, Cu10, Ni120, NiFe604 |
| Resistance Ranges | 0–150 Ω, 0–500 Ω, 0–1000 Ω, 0–3000 Ω |
| Temperature Range | –200 °C … +850 °C (depending on RTD type) |
| Resolution | 16-bit ADC, 0.01 °C for temperature |
| Accuracy | ±0.1 °C (Pt100); ±0.2% of full scale |
| Conversion Type | Sigma-Delta modulation |
| Filtering | Programmable 10–250 Hz low-pass filter |
| Update Time | 17 ms … 1.2 s per channel (configurable) |
| Backplane Current | 50 mA @ 5 V DC |
| Power Dissipation | Max 1.5 W |
| Isolation Voltage | 500 V DC (input to backplane) |
| Operating Temperature | 0 … +60 °C |
| Storage Temperature | –40 … +85 °C |
| Certifications | UL, CSA, CE, RoHS, Class I Div 2 |
| Mounting | SLC 500 chassis (non-slot 0) |
| Termination | Removable terminal block |
