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The Allen-Bradley 1756-IF8HK is the conformally coated version of the ControlLogix 8-point differential analog input module with HART protocol support. It provides eight differential current/voltage inputs (36-pin) with 16-21 bit resolution and 50V continuous isolation between inputs, plus a conformal coating that protects the circuit board against moisture, dust and corrosive atmospheres for harsh industrial environments. Technical data sourced directly from the official Rockwell Automation 1756-IF8H product page and ControlLogix I/O specifications. Supplied by SHLY-PLC, an independent industrial automation distributor; each unit undergoes visual inspection and functional testing before shipment. Contact our team for compatibility verification.
Official Rockwell Automation 1756-IF8H / 1756-IF8HK Technical Data
| Technical Specifications | |
| Catalog Number | 1756-IF8HK (Series B) |
| Coating | Conformally coated |
| Module Type | Analog differential input with HART protocol |
| Number of Inputs | 8 differential inputs |
| Input Signal | ±10V, 0-5V, 1-5V, 0-10V, 0-20mA, 4-20mA |
| Input Range | Voltage -10…+10V; Current 0-20mA, 4-20mA |
| Resolution | 16 to 21 bits |
| HART Protocol | Supported on all channels |
| Isolation | 50V continuous between inputs |
| Backplane Current | 300 mA @5.1V DC; 135 mA @24V DC |
| Terminal Block | 36-pin RTB |
| Environmental Ratings | |
| Operating Temperature | 0°C ~ +60°C |
| Agency Certifications | |
| Certifications | CE, cULus, EMC, RoHS; China CCC; American Bureau of Shipping (ABS) |
The 1756-IF8HK fits any ControlLogix chassis slot (slot width 1) and uses a 36-pin removable terminal block (1756-TBCH / 1756-TBSH / 1756-TBNH). Configured via RSLogix 5000 / Studio 5000 with electronic module keying and HART channel settings; firmware version 3.012. This listing is provided by an independent industrial automation distributor; brand names and part numbers are used for product identification only.
Warranty: 12-month seller warranty provided by SHLY-PLC. See our Return Policy for coverage and claims.
A: The conformally coated version of the ControlLogix 8-point differential analog input module with HART protocol support.
A: "K" indicates conformal coating, which protects the PCB against moisture, dust and corrosive atmospheres for harsh environments.
A: 1756-IF8HK is non-isolated (50V between inputs); 1756-IF8IHK is the isolated version with 250V reinforced inputs-to-backplane isolation. Both are conformally coated.
A: 1756-TBCH, 1756-TBSH and 1756-TBNH 36-pin removable terminal blocks.
1756-IF8HK · Technical reference data · Independently supplied by SHLY-PLC
Standard International (tracked courier): delivered in 5–8 business days. In-stock items are processed within 2–4 business days. USD 25 flat rate on orders of $500 or less; free on orders over $500.
Express (DHL Express / FedEx International): upgraded expedited delivery in 2–4 business days. The Express surcharge is calculated at checkout based on destination and order weight.
Non-Stock / On-Order items ship on request: dispatch time is confirmed before your order — see our Shipping Policy. Remote-area and overweight surcharges, where applicable, are shown before checkout.
Every product is covered by a 12-month seller warranty provided by SHLY-PLC, effective from the date of delivery, against defects in materials and workmanship under normal use. Manufacturer or factory warranty service is not applicable, and extended warranty packages are not provided.
This warranty does not cover damage from misuse, improper installation, power surges, neglect, unauthorized repair, or normal wear and tear. See our Return Policy for warranty-claim instructions.
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