Installation Notes
The RTD, ohms terminal block is recommended to provide screw terminations for field wiring for the RTD, ohms card.
| Item | Specification |
|---|---|
| Number of channels | Eight |
| Sensor Types | 2-wire, 3-wire, or 4-wire: Resistance, Pt100, Pt200, Pt500, Ni120, Cu10, user defined |
| Full scale signal range | Selectable based on sensor. Refer to Table: RTD, ohms Sensor Type Specifications. |
| LocalBus Power Rating | 12 VDC, 160 mA |
| Ambient Temperature |
0 to 60°C Series 2: -40 to 70°C |
| Accuracy over temperature range | Refer to Table: RTD, ohms Sensor Type Specifications. |
|
Resolution (Varies with sensor type. Refer to Table C-32). |
16 bits conversion |
| Repeatability | 0.05% of span |
| DC/50/60/Hz Common Mode Rejection | 120 dB |
| Calibration | None required |
| Mounting | Assigned slot of I/O carrier |
The following table shows the full scale, operating range, reference accuracy, temperature drift, and resolution for the RTD, ohms sensor types
| Sensor Type | Full Scale | Operating Range | 25° Reference Accuracy | Temperature Drift | Resolution |
|---|---|---|---|---|---|
| Resistance | 0 to 2,000 Ω | 0 to 2,000 Ω | ±6.2 Ω | ±0.112 Ω/°C | ~0.02 Ω |
| Pt100 | -200 to 850°C | -200 to 850°C | ±0.5°C | ±0.018°C/°C | ~0.05°C |
| Pt200 | -200 to 850°C | -200 to 850°C | ±0.5°C | ±0.012°C/°C | ~0.05°C |
| Pt500 | -200 to 850°C | -200 to 850°C | ±3.5°C | ±0.063°C/°C | ~0.18°C |
| Ni120 | -70 to 300°C | -70 to 300°C | ±0.2°C | ±0.006°C/°C | ~0.02°C |
| Cu10 | -30 to 140°C | -30 to 140°C | ±2.0°C | ±0.157°C/°C | ~0.23°C |
| Resistance/user defined(1) | 0 to 1000 Ω | 0 to 1000 Ω | ±0.4 Ω | ±0.009 Ω/°C | ~0.05 Ω |
(1) The Callendar-Van
Dusen linearization equation can be used with user defined Pt RTDs. Refer to
Recommended I/O Practices in DeltaV Books online for usage information.
