Allen-Bradley 1746-NR4 SLC 500 RTD Input Module
$123.00
$320.00
Description
Product Description
The Allen-Bradley 1746-NR4 is a four-channel RTD and resistance input module designed for the SLC 500 programmable controller platform. This analog input module supports direct connection of multiple RTD sensor types and resistance-based measurement devices, providing accurate temperature and resistance monitoring in industrial control systems.
Engineered for compatibility with both fixed and modular SLC 500 chassis configurations, the 1746-NR4 delivers high-resolution analog acquisition using sigma-delta A/D conversion technology. The module is suitable for applications requiring stable temperature measurement, sensor monitoring, and process feedback in manufacturing and process automation environments.
The module supports a wide range of RTD sensor standards including platinum, nickel, copper, and nickel-iron elements. Flexible resistance input ranges allow integration with custom resistive sensing devices and instrumentation circuits.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley |
| Model Number | 1746-NR4 |
| Product Family | SLC 500 |
| Product Type | RTD / Resistance Analog Input Module |
| Input Channels | 4 Analog Inputs |
| Input Signal Type | RTD and Resistance |
| Supported RTD Types | Platinum 385, Platinum 3916, Copper 426, Nickel 618, Nickel 672, Nickel-Iron 518 |
| Supported RTD Values | 10 Ω, 100 Ω, 120 Ω, 200 Ω, 500 Ω, 604 Ω, 1000 Ω |
| Resistance Input Ranges | 0–150 Ω, 0–300 Ω, 0–500 Ω, 0–1000 Ω |
| Conversion Method | Sigma-Delta Modulation |
| Module Resolution | 0.01°C |
| Bandwidth Range | 2.62 Hz to 65.5 Hz |
| Channel Update Time | 17 ms to 1.2 s |
| Step Response | 60 ms Input / 2.5 ms Output |
| Backplane Current Draw | 50 mA |
| Power Consumption | 1.5 W Maximum |
| 5V DC Backplane Load | 0.3 W |
| 24V DC Backplane Load | 1.2 W |
| Isolation Rating | 500 V for 1 Minute |
| Compatible Chassis | Fixed and Modular SLC 500 |
| Slot Installation | Any Slot Except Slot 0 |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Approximate Weight | 0.26 kg |
| Module Category | PLC Analog Input Module |
Supported Sensor Compatibility
The 1746-NR4 supports several industry-standard RTD sensor types commonly used in process instrumentation:
-
Platinum RTD (α = 0.00385)
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Platinum RTD (α = 0.003916)
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Copper RTD
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Nickel RTD
-
Nickel-Iron RTD
This flexibility simplifies integration into existing temperature control systems without requiring additional signal converters.
Key Functional Features
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Four isolated RTD/resistance input channels
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High-accuracy temperature measurement capability
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Direct connection for RTD sensors without external transmitters
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Compatible with multiple resistance ranges
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Configurable filtering and bandwidth settings
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Supports modular and fixed SLC 500 hardware
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Sigma-delta conversion improves noise rejection performance
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Compact rack-mounted SLC 500 module design
Typical Applications
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Industrial temperature monitoring
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Process heating and cooling systems
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HVAC automation
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Furnace and oven control
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Chemical processing equipment
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Food and beverage production
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Water treatment facilities
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Machine condition monitoring
FAQ
What sensors are compatible with the 1746-NR4?
The module supports platinum, nickel, copper, and nickel-iron RTD sensors, along with direct resistance input devices.
Can the 1746-NR4 be installed in any SLC 500 slot?
The module can be installed in any available chassis slot except Slot 0.
Does the module support direct resistance measurement?
Yes. In addition to RTD sensors, the module accepts several direct resistance input ranges up to 1000 Ω.
What type of analog conversion does the module use?
The 1746-NR4 uses sigma-delta A/D conversion for stable and accurate analog signal processing.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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