Temperature Control Solution — Allen-Bradley 1762-IT4 | MicroLogix Expansion
Where This Product Is Used
The Allen-Bradley 1762-IT4 is a 4-channel thermocouple and RTD analog input module designed for the MicroLogix 1100 and 1400 controller platforms. It is deployed wherever precise temperature measurement is critical to process integrity and product quality.
Typical deployment environments include:
- Food & Beverage Processing — Oven temperature profiling, pasteurization loop control, and cold-chain monitoring using Type J/K thermocouples.
- Plastics & Injection Molding — Barrel zone temperature regulation with RTD Pt100 sensors for tight ±1°C tolerance.
- HVAC & Building Automation — Chiller plant monitoring, boiler control, and air-handling unit temperature feedback.
- Pharmaceutical Manufacturing — Validated temperature logging in autoclaves, lyophilizers, and clean-room environments.
- Chemical & Petrochemical Plants — Reactor temperature monitoring with thermocouple inputs rated for high-temperature ranges.
- Water & Wastewater Treatment — Process temperature measurement in aeration tanks and heat-exchange systems.
- OEM Machine Builders — Compact panel designs requiring multi-channel temperature input without a dedicated analog rack.
Technical Specifications
| Catalog Number | 1762-IT4 |
| Series | MicroLogix Expansion I/O |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Number of Input Channels | 4 (differential) |
| Input Types Supported | Thermocouple: J, K, E, T, R, S, B, N; RTD: Pt100 (α=0.00385), Ni120; mV input |
| Resolution | 16-bit (±32,767 counts) |
| Accuracy | ±1°C typical (thermocouple); ±0.5°C typical (RTD) |
| Cold Junction Compensation | Internal, automatic |
| Update Rate | ~500 ms per channel (all 4 channels) |
| Input Impedance | >1 MΩ |
| Backplane Current Draw | 75 mA @ 5 VDC |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5% to 95% non-condensing |
| Dimensions (H × W × D) | 90 × 40 × 87 mm |
| Weight | Approx. 150 g |
| Enclosure Rating | Open-style (requires enclosure) |
| Compatible Controllers | MicroLogix 1100 (1763-L16xxx), MicroLogix 1400 (1766-L32xxx) |
| Communication | Via MicroLogix backplane (not standalone) |
| Certifications | UL Listed, CE Marked, C-Tick |
Why Engineers Specify This Model
- Multi-sensor flexibility — A single module handles eight thermocouple types plus RTD and millivolt inputs, eliminating the need for separate signal conditioners.
- High-resolution 16-bit ADC — Delivers 0.1°C display resolution, meeting the accuracy demands of pharmaceutical and food-safety applications.
- Automatic cold junction compensation — Eliminates external reference junction hardware, reducing wiring complexity and panel footprint.
- Open-wire detection — Each channel independently detects broken sensor leads and sets a fault bit, enabling safe-state logic in the PLC program.
- Compact MicroLogix form factor — Snaps directly onto the MicroLogix expansion bus; no additional power supply or rack required for installations up to 7 expansion modules.
- Proven platform longevity — MicroLogix 1100/1400 platforms remain widely supported with available spare parts, making the 1762-IT4 a low-risk choice for long-lifecycle OEM machines.
- RSLogix 500 / Studio 5000 Logix Designer compatible — Configuration via familiar Rockwell software with built-in module profile; no custom EDS file required.
Complete System Bill of Materials
A typical MicroLogix temperature-control panel using the 1762-IT4 includes the following components:
- MicroLogix 1100 Controller — e.g., 1763-L16BWA (16 I/O, 24 VDC in / relay out)
- 1762-IT4 Thermocouple/RTD Input Module (this item)
- MicroLogix Expansion Cable — 1762-CAB series (if remote mounting)
- 24 VDC Power Supply — e.g., 1606-XLP30E (30 W, DIN rail)
- Type K Thermocouple Sensors — field-selected per process temperature range
- Terminal Blocks — 1492-W3 or equivalent for thermocouple-grade wiring
- DIN Rail & Enclosure — NEMA 12 or IP54 rated for industrial environments
- RSLogix 500 Programming Software — Catalog 9324-RL0300ENE (or Studio 5000 with legacy support)
Compliance & Industry Standards
- UL 508 — Industrial Control Equipment (UL Listed)
- CE Marking — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- C-Tick / RCM — Australian Communications and Media Authority compliance
- IEC 61131-2 — Programmable Controllers: Equipment Requirements and Tests
- RoHS Compliant — Restriction of Hazardous Substances Directive 2011/65/EU
- ATEX / IECEx — Not rated for hazardous locations; install in appropriate enclosure per local code
Quality Assurance & Sourcing
Konmask.com sources the 1762-IT4 through verified industrial distribution channels. Every unit offered is subject to the following quality controls:
- Authenticity verification — Holographic labels, date codes, and firmware revision checked against Rockwell Automation factory records.
- Functional pre-shipment inspection — Modules are bench-tested for backplane communication and channel response prior to dispatch.
- Traceability documentation — Certificate of conformance and country-of-origin documentation available upon request for regulated industries.
- Packaging integrity — ESD-safe anti-static bags with moisture indicator cards; outer carton with shock-watch labels for international shipments.
- Warranty — 12-month warranty against manufacturing defects; advance replacement available for qualified accounts.
How to Source This Part
- Confirm compatibility — Verify your MicroLogix controller model (1763-L16xxx or 1766-L32xxx) and available expansion slots (max 7 modules).
- Check quantity & lead time — Contact us via the form below or email support@konmask.com for real-time stock status and bulk pricing.
- Request a quote — Provide your PO number, required delivery date, and shipping destination. We support DDP, DAP, and EXW Incoterms.
- Place your order — Secure checkout via this page (credit card, T/T wire transfer, or net-30 for approved accounts).
- Track your shipment — All orders ship with full tracking. Express DHL/FedEx available for urgent requirements.
Application-Specific FAQ
Q: Can the 1762-IT4 be used with a MicroLogix 1000 or 1200?
A: No. The 1762-IT4 is compatible only with MicroLogix 1100 and 1400 platforms. MicroLogix 1000 and 1200 use a different expansion bus architecture.
Q: How many 1762-IT4 modules can I add to one MicroLogix 1100?
A: Up to 7 expansion modules total (any mix of 1762-series I/O). Each 1762-IT4 consumes 75 mA from the 5 VDC backplane; verify total current budget does not exceed the controller’s backplane supply rating.
Q: Can I mix thermocouple and RTD sensors on the same module?
A: Yes. Each channel is independently configurable in RSLogix 500. You can assign Channel 0 to a Type K thermocouple and Channel 1 to a Pt100 RTD simultaneously.
Q: What happens if a thermocouple wire breaks?
A: The module sets an open-wire fault bit for the affected channel and drives the channel value to the configured fault state (upscale, downscale, or hold last value), allowing your PLC program to execute a safe-state response.
Q: Is the 1762-IT4 suitable for SIL-rated safety applications?
A: No. The 1762-IT4 is a standard (non-safety) module. For SIL 2/3 temperature measurement, consider the GuardLogix or Safety I/O platforms from Rockwell Automation.
Q: Do you supply the module with a warranty and documentation?
A: Yes. All units ship with a 12-month warranty, certificate of conformance, and access to the Rockwell Automation publication 1762-UM006 user manual. Contact us if you require additional factory documentation.
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