Allen-Bradley 1762-IR4 RTD Temperature Input | Replacement, Equivalent & Selection Guide
Technical Specifications
- Part Number: 1762-IR4
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Series: MicroLogix Expansion I/O
- Module Type: 4-Channel RTD / Resistance Temperature Input
- Input Channels: 4 isolated RTD/resistance inputs
- Supported Sensor Types: PT100, PT1000, NI120, NI1000, 10Ω Cu, 100Ω Cu; custom resistance (0–3000 Ω)
- Temperature Range: –200 °C to +870 °C (sensor-dependent)
- Resolution: 0.1 °C / 0.1 °F
- Accuracy: ±0.5 °C typical
- Wiring: 2-wire, 3-wire, or 4-wire RTD
- Bus Current Draw: 40 mA @ 5 VDC
- Operating Temperature: 0 °C to +60 °C
- Dimensions (H × W × D): 90 × 40 × 87 mm
- Weight: 215 g
- Compatible Controllers: MicroLogix 1100 (1763-L16xxx), MicroLogix 1400 (1766-L32xxx)
- Certifications: UL, CE, C-Tick
Compatible Replacement & Equivalent Models
When the 1762-IR4 is unavailable or under evaluation, the following alternatives are commonly specified by engineers:
- 1762-IR4 (OEM original) — Rockwell Automation factory-new unit; highest compatibility guarantee
- Siemens SM 331 (6ES7331-7PF01-0AB0) — 8-channel RTD input for S7-300; requires gateway or protocol conversion
- Mitsubishi Q68RD3N — 8-channel RTD for Q-series; different bus architecture, not plug-compatible
- Schneider Electric BMXART0814 — 8-channel RTD for Modicon M340; requires re-engineering of I/O map
- Phoenix Contact IB IL TEMP 2 RTD — Inline RTD module; suitable for distributed I/O architectures
Note: Third-party replacements require full I/O re-mapping and validation. The 1762-IR4 OEM unit is the only drop-in compatible option for MicroLogix 1100/1400 systems.
Why Choose the Original Model
- Zero re-engineering: Plug-and-play replacement — no I/O map changes, no firmware updates required
- Rockwell Studio 5000 / RSLogix 500 native support: Full tag-based programming with pre-built function blocks
- Isolated inputs: Each channel is individually isolated, eliminating ground loop interference in industrial environments
- Multi-wire flexibility: Supports 2-, 3-, and 4-wire RTD configurations in a single module
- Proven field reliability: Widely deployed in food & beverage, HVAC, and chemical processing since 2005
- Rockwell warranty & lifecycle support: Active product with long-term availability commitment
Typical Applications
- HVAC Systems: Chiller supply/return temperature monitoring, AHU coil temperature control
- Food & Beverage: Pasteurization loop temperature, cold storage monitoring, CIP process control
- Pharmaceutical: Autoclave temperature validation, clean-room ambient monitoring
- Water & Wastewater: Influent/effluent temperature logging, digester temperature control
- Plastics & Extrusion: Barrel zone temperature control with PT100 sensors
- OEM Machinery: Compact machine builders requiring precise multi-point temperature acquisition
System Compatibility
- MicroLogix 1100 (1763-L16BWA / L16BBB / L16AWA): Up to 4 expansion modules; 1762-IR4 fully supported
- MicroLogix 1400 (1766-L32BWA / L32BWAA / L32AWA): Up to 7 expansion modules; 1762-IR4 fully supported
- Programming Software: RSLogix 500 v8.0+, Studio 5000 Logix Designer (via Connected Components Workbench)
- Communication: Inherits controller’s EtherNet/IP, DH-485, or DF1 network
- Not compatible with: MicroLogix 1000, 1200, SLC 500, ControlLogix, CompactLogix
Selection Guide
| Requirement | Recommended Model | Reason |
|---|---|---|
| 4-ch RTD, MicroLogix 1100/1400 | 1762-IR4 | Native, drop-in compatible |
| 4-ch Thermocouple, MicroLogix | 1762-IT4 | Same form factor, TC input |
| 8-ch RTD, MicroLogix | 2× 1762-IR4 | Stack two modules |
| RTD + Analog combo, MicroLogix | 1762-IR4 + 1762-IF4 | Mixed I/O expansion |
| RTD, CompactLogix L1/L2/L3 | 1769-IR6 | Compact I/O series equivalent |
Quality Assurance & Sourcing
- Authenticity: All units sourced from authorized Rockwell Automation distributors or verified surplus channels
- Inspection: 100% visual and functional inspection prior to shipment
- Condition: New (factory-sealed) and refurbished (tested, warranted) options available
- Traceability: Date code and lot documentation provided on request
- Warranty: 12-month replacement warranty on all units shipped from Konmask.com
How to Order
- Step 1: Confirm your MicroLogix controller model (1100 or 1400) and available expansion slots
- Step 2: Verify RTD sensor type (PT100, NI120, etc.) and wiring configuration (2/3/4-wire)
- Step 3: Add 1762-IR4 to cart or contact us for volume pricing and lead time
- Step 4: Request datasheet, wiring diagram, or RSLogix 500 sample program if needed
📧 support@konmask.com | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Can the 1762-IR4 replace a 1762-IT4?
A: No. The 1762-IT4 is a thermocouple input module; the 1762-IR4 is RTD/resistance. They are not interchangeable — verify your sensor type before ordering.
Q: Is the 1762-IR4 compatible with MicroLogix 1200?
A: No. MicroLogix 1200 uses the 1762 expansion bus physically but the 1762-IR4 is not listed as compatible. Use 1762-IF4 for analog or consult Rockwell for 1200-series RTD options.
Q: Can I use a Siemens RTD module as a direct replacement?
A: Not directly. Cross-brand replacements require protocol gateways, I/O re-mapping, and full system re-validation. The 1762-IR4 OEM unit is the only true drop-in replacement.
Q: What is the lead time for the 1762-IR4?
A: In-stock units ship within 1–3 business days. Contact us for current availability and expedited shipping options.
Q: Do you provide a certificate of conformance?
A: Yes. CoC and inspection reports are available upon request for all units.
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Contact: support@konmask.com | +0086 19859288691
