Temperature Measurement Solution – Allen-Bradley 1746-INT4 | SLC 500 Series
The Allen-Bradley 1746-INT4 is a 4-channel thermocouple input module designed for the SLC 500 programmable controller platform. It delivers precise, isolated temperature measurements directly into your control system — purpose-built for demanding industrial environments where accuracy and reliability are non-negotiable.
Where This Product Is Used
The 1746-INT4 is specified across a broad range of temperature-critical industrial applications:
- Furnace & Kiln Control — Continuous monitoring of combustion zones, hearth temperatures, and atmosphere control in heat-treatment and ceramics manufacturing.
- Plastics & Rubber Processing — Barrel, nozzle, and mold temperature regulation in injection molding and extrusion lines.
- Food & Beverage Processing — Pasteurization, sterilization, and cooking process temperature loops requiring hygienic, accurate sensing.
- HVAC & Building Automation — Duct, chiller, and boiler temperature monitoring integrated into SLC 500-based BAS panels.
- Chemical & Petrochemical Plants — Reactor vessel and pipeline temperature acquisition in hazardous-area control cabinets.
- Metal Forming & Welding — Pre-heat and inter-pass temperature verification on rolling mills and resistance welding equipment.
- Pharmaceutical Manufacturing — Validated temperature logging for autoclaves, lyophilizers, and clean-room HVAC systems.
Technical Specifications
- Part Number: 1746-INT4
- Platform: Allen-Bradley SLC 500
- Input Channels: 4 (isolated)
- Input Type: Thermocouple (J, K, E, T, R, S, B, N types supported)
- Resolution: 0.1 °C / 0.1 °F
- Accuracy: ±1 °C (typical, type-dependent)
- Cold Junction Compensation: Automatic, internal
- Input Impedance: >1 MΩ
- Isolation: Channel-to-channel and channel-to-backplane
- Backplane Current Draw: 150 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)
- Weight: Approx. 400 g
- Certifications: UL, CE, CSA
Why Engineers Specify This Model
- Native SLC 500 Integration — Slots directly into any SLC 500 chassis; no external signal conditioners or marshalling panels required.
- Multi-Type Thermocouple Support — A single module handles J, K, E, T, R, S, B, and N types, reducing spare-parts inventory.
- Automatic Cold Junction Compensation — Eliminates manual offset calculations and improves measurement stability across ambient temperature swings.
- Channel Isolation — Prevents ground loops between sensors at different potentials — critical in furnace and chemical applications.
- Open-Wire Detection — Flags broken thermocouple leads in the data table, enabling immediate fault response in ladder logic.
- Proven Field Reliability — Part of the SLC 500 ecosystem with decades of installed base in global manufacturing facilities.
Complete System Bill of Materials
A typical SLC 500 temperature-monitoring rack using the 1746-INT4 includes:
- 1746-INT4 — Thermocouple Input Module (this item)
- 1746-A4 / A7 / A10 / A13 — SLC 500 Chassis (4, 7, 10, or 13 slots)
- 1747-L40 / L541 / L551 — SLC 5/04 or 5/05 Processor
- 1746-P2 / P4 — Power Supply (2 A or 4 A)
- 1747-UIC — USB-to-DH-485 Programming Cable
- 1746-NO4I / NO4V — Analog Output Module (for PID control loops)
- 1746-OB16 — Digital Output Module (for alarm relays or actuators)
- Thermocouple extension wire (type-matched, shielded)
- Terminal block assemblies and DIN rail hardware
Compliance & Industry Standards
- UL Listed — UL 508 (Industrial Control Equipment)
- CE Marked — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- CSA Certified — C22.2 No. 142
- RoHS Compliant — Restriction of Hazardous Substances Directive
- IEC 61131-2 — Programmable Controllers: Equipment Requirements and Tests
- NEMA 4X Enclosure Compatible — When installed in rated enclosures for washdown or outdoor applications
Quality Assurance & Sourcing
Every 1746-INT4 unit sourced through Konmask.com undergoes a structured verification process before dispatch:
- Visual Inspection — Connector integrity, label authenticity, and housing condition checked against OEM reference standards.
- Functional Bench Test — Module powered and channel response verified where test infrastructure permits.
- Traceability Documentation — Batch records and sourcing chain documentation available on request for regulated industries.
- Secure Packaging — ESD-safe bags, foam-lined cartons, and moisture-barrier sealing for international shipments.
- Warranty — 90-day replacement warranty against defects in materials and workmanship.
How to Source This Part
- Confirm your chassis slot count and processor model — Ensure compatibility with your existing SLC 500 rack configuration.
- Specify thermocouple types in use — The 1746-INT4 supports all common types; confirm wiring polarity before installation.
- Contact Konmask for availability and lead time — Email support@konmask.com or call +0086 19859288691 for stock confirmation and volume pricing.
- Request a proforma invoice — Required for cross-border procurement and customs clearance documentation.
- Place order and receive tracking — Orders are dispatched with full shipment tracking and commercial invoice.
Application-Specific FAQ
Q: Can the 1746-INT4 be used in a SLC 5/03 system?
A: Yes. The 1746-INT4 is compatible with all SLC 500 processors (5/01 through 5/05) and any standard SLC 500 chassis.
Q: How many 1746-INT4 modules can I install in one chassis?
A: Multiple modules can be installed subject to chassis slot count and power supply current budget. Each module draws 150 mA at 5 VDC from the backplane.
Q: Does the module support RTD inputs?
A: No. The 1746-INT4 is thermocouple-only. For RTD (PT100/PT1000) inputs, specify the Allen-Bradley 1746-NR4 module instead.
Q: What is the update rate per channel?
A: The module scans all four channels sequentially. Total update time is approximately 160–320 ms depending on thermocouple type and filter settings configured in RSLogix 500.
Q: Is this module available as a new or refurbished unit?
A: Konmask supplies both new-surplus and professionally refurbished units. Condition is clearly stated at time of quotation. Contact us to specify your preference.
Q: Can you provide a certificate of conformance?
A: Yes. A certificate of conformance and sourcing documentation can be provided upon request for regulated procurement processes.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
