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PLC, I/O & HMI
1756-IB16
Allen-Bradley
Allen-Bradley 1756-IB16 sourcing reference. Send the complete nameplate details and required quantity for review.
This page identifies a sourcing reference. It does not guarantee continuous stock. Availability, condition, quantity, lead time, and commercial terms are confirmed after inquiry.
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Reference details
- Manufacturer / brand
- Allen-Bradley
- Model / reference
- 1756-IB16
- Series / type
- Confirm against nameplate
- Condition
- Confirm with inquiry
- Quantity
- Confirm with inquiry
- Lead time
- Confirm with inquiry
Product information
Product Overview
The 1756-IB16 is a ControlLogix 16-point digital input module for 10–31 V DC sinking inputs, on a 20-pin removable terminal block. It occupies any slot of a 1756 chassis and provides 250 V continuous isolation between inputs and backplane. As one of the most widely used DC input cards in the 1756 range, it is a standard spare for panels switching 24 V DC proximity switches, limit switches and relay contacts.
Technical Specifications (Official Rockwell Data)
| Product family | ControlLogix digital I/O module |
|---|---|
| Input type | Sinking DC digital input |
| Input signal range | 10–31 V DC |
| Number of channels | 16 |
| Terminal block | 20-pin removable (1756-TBNH / TBSH class) |
| Isolation | 250 V continuous, basic insulation, inputs-to-backplane |
| Module location | Any slot of a 1756 chassis |
| Product series | Series A |
| Lifecycle status (Rockwell) | Active |
Lifecycle Status & Availability
Rockwell lists the 1756-IB16 as Active. Note that Rockwell’s current catalog also carries the 1756-IB16K (conformally coated variant for corrosive environments) and the 1756-IB16S/SK safety-rated input module — confirm which variant your panel uses before ordering.
Typical Applications
- 24 V DC field-input duty in ControlLogix panels: proximity switches, limit switches, pushbuttons, relay contacts
- Machine retrofits standardizing on 1756 digital I/O
- Spares pools for mixed 1756 chassis (with 5570 or 5580 controllers)
Related & Compatible Models
Family variants: 1756-IB16K (conformal coating), 1756-IB16S/SK (safety I/O for GuardLogix). Output counterpart: 1756-OB16 family (DC sourcing outputs). Relay-type I/O: 1756-OW16I / OX8I. All mount in the same 1756 chassis range (A4…A17) with 1756-Px7x power supplies.
Requesting a Quotation
Send the exact catalog number including any suffix (plain IB16 vs IB16K vs IB16S — they are different products), the series letter from the label, and quantity. For spares orders, a nameplate photo ensures the terminal-block style (20-pin) matches your stock of wiring looms. Pricing and availability are confirmed by quotation.
Frequently Asked Questions
IB16 vs IB16K — what is the difference?
The K suffix denotes a conformally coated module for harsh/corrosive atmospheres (chemical plants, wastewater, coastal sites). Electrically they serve the same 16-pt 10–31 V DC input function; choose the K where coating is specified.
Is IB16 safety-rated?
No — the standard IB16 is a general-purpose input. Safety applications use the 1756-IB16S/SK with GuardLogix safety controllers. Check your safety documentation before substituting.
Which terminal block do I need?
The IB16 uses a 20-pin removable terminal block (e.g. 1756-TBNH screw / 1756-TBSH spring class). If your panel spares include pre-wired looms, match the terminal block type in your order.
Can it go into any chassis slot?
Yes — 1756 digital I/O modules occupy any slot of any 1756 chassis, subject to the chassis power budget. Include your chassis layout if you want the configuration checked during quotation.
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