- Four RTD or resistance input channels with backplane isolation
- Selectable digital filtering for noise rejection and update-time control
- Automatic channel calibration with supported engineering-unit and raw-data formats
1746-NR4 is an Allen-Bradley RTD/resistance input module for SLC 500 chassis.
The module converts low-level resistance measurements for the processor while supporting configurable sensor types, wiring methods, filtering, and data presentation.
Before installation or replacement, verify the RTD element, lead-wire arrangement, channel setup, terminal schedule, chassis power budget, and program scaling.
Availability, condition, price, and shipping time for 1746-NR4 are confirmed during quotation.
Allen-Bradley 1746-NR4 RTD/Resistance Input Module Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Select the documented RTD material, temperature coefficient, or resistance range for each enabled channel
- Match two-, three-, or four-wire termination to the installed sensor and lead arrangement
- Use channel status words to distinguish open-circuit, overrange, and configuration conditions
- Choose 10 Hz for strongest rejection when a slower response is acceptable
- Use 50 or 60 Hz filtering to reject the applicable mains-frequency interference
- Use 250 Hz filtering only when faster updating is more important than low-frequency rejection
- Install in an SLC 500 I/O slot other than processor slot 0
- Reserve 50 mA at 5 V DC and 50 mA at 24 V DC in the chassis power calculation
- Maintain separation between low-level sensor wiring and noise-producing conductors
- Multichannel platinum, nickel, copper, or nickel-iron RTD temperature measurement
- Direct resistance measurement for compatible process and machine sensors
- SLC 500 process monitoring where configurable filtering and sensor-fault diagnostics are required