Manufacturer: Allen-Bradley
Product No.: 1746-NR4
Country of origin:United States
Product Type: RTD/Resistance Input Module
Payment: T/T, Western Union
Weight: 1000g
Shipping port: Xiamen
Warranty: 12 months
The Allen-Bradley 1746-NR4 is a four-channel RTD and direct-resistance input module for the SLC 500 1746 I/O platform. Each channel is configured independently for its sensor type, excitation current, data format, and digital filter. The module reports converted values through the SLC image table and provides channel diagnostics for open-circuit, short-circuit, configuration, and out-of-range conditions.
| Catalog number | 1746-NR4 |
|---|---|
| Module type | RTD/resistance input module |
| Input channels | 4, individually configurable |
| Supported RTDs | Platinum 385 and 3916 (100, 200, 500, and 1000 ohm); Copper 426 (10 ohm); Nickel 618 and 672 (120 ohm); Nickel-Iron 518 (604 ohm) |
| Direct-resistance ranges | 0–150, 0–500, 0–1000, and 0–3000 ohm ranges; the 3000-ohm range is limited to 1900 ohm when 2.0 mA excitation is selected |
| Excitation current | 0.5 mA or 2.0 mA, selected per channel; the 10-ohm copper RTD requires 2.0 mA |
| Filter selections | 10, 50, 60, or 250 Hz |
| Step response | 300 ms at 10 Hz; 60 ms at 50 Hz; 50 ms at 60 Hz; 12 ms at 250 Hz |
| Backplane current | 50 mA at 5 V DC and 50 mA at 24 V DC |
| Input-to-backplane isolation | 500 V AC for 1 minute |
| Channel-to-channel isolation | None |
| Common-mode separation | ±1 V maximum |
The 1746-NR4 accepts two-wire and three-wire RTDs. A four-wire sensor is connected as a three-wire device; one compensation lead is not used. For two-wire or three-wire circuits, use cable with consistent conductor impedance. Record the existing terminal assignment, sensor coefficient, excitation current, filter, temperature units, and data format before replacing a module.
The filter setting is an engineering trade-off. A 10 Hz filter gives stronger 50/60 Hz rejection but a 300 ms step response. The 250 Hz setting responds in 12 ms with less noise rejection. Changing this setting can alter both update time and measurement stability without any wiring change.
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| Product Image | Model Number / Title | Condition | Availability | Action |
|---|---|---|---|---|
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Allen-Bradley 1746-IO8 SLC 500 Combination Input and Output Module | Original New | In Stock | View Details |
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Allen-Bradley 1746-BAS SLC 500 BASIC Module | Original New | In Stock | View Details |
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Allen-Bradley 1746-P4 SLC 500 Power Supply | Original New | In Stock | View Details |
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Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|
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