Reference packaging image. Exact product photo pending verification.
PLC, I/O & HMI
1756-A7
Allen-Bradley
Allen-Bradley 1756-A7 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.
Copy the model and paste it into WhatsApp with your required quantity.
Reference details
- Manufacturer / brand
- Allen-Bradley
- Model / reference
- 1756-A7
- Series / type
- Confirm against nameplate
- Condition
- Confirm with inquiry
- Quantity
- Confirm with inquiry
- Lead time
- Confirm with inquiry
Product information
Product Overview
The 1756-A7 is the 7-slot ControlLogix chassis — the aluminum backplane frame that carries one power supply and up to seven 1756 modules (controllers, I/O, communication bridges). Cooling is by convection, per official data, so no chassis fans are involved; module spacing and enclosure ventilation follow Rockwell’s published minimum enclosure dimensions. Series C is the current hardware series. Chassis selection drives the whole panel architecture: slot count must cover controller, power, communication and I/O modules with spare slots for expansion.
Technical Specifications (Official Rockwell Data)
| Product family | ControlLogix chassis |
|---|---|
| Capacity | 7 slots |
| Cooling | Convection (no fans) |
| Minimum enclosure size (H×W×D) | 50.8 × 60.9 × 20.3 cm (20 × 24 × 8 in) |
| Compatible modules | All 1756 controllers, I/O, communication and power-supply modules |
| Product series | Series C |
| Lifecycle status (Rockwell) | Active |
Lifecycle Status & Availability
Rockwell lists the 1756-A7 as Active (Series C). The 1756 chassis family spans 4 to 17 slots (A4/A5/A7/A10/A13/A17); all share the same backplane and module compatibility, so chassis choice is purely a slot-count and space decision.
Typical Applications
- Mid-size panels: one 5570/5580 controller + EtherNet/IP bridge + a few I/O cards with room to grow
- Machine-level ControlLogix retrofits where wall space is fixed
- Spares strategy — chassis rarely fail, but a stocked spare shortens recovery after electrical damage
Related & Compatible Models
Sibling chassis: 1756-A4 (4-slot compact), 1756-A10/A13/A17 (10/13/17-slot). Power supplies: 1756-PA75/PA72 (AC), PB75/PB72 (DC), PA75R (redundant). Every 1756 module from any generation mounts in the A7 — the platform’s slot compatibility across 25+ years is its key installed-base advantage.
Requesting a Quotation
Send the catalog number, quantity, and — if planning a new build — your intended module lineup so slot fit and power budget can be checked in the quotation. Include the power supply model if ordering as a set. Pricing and availability are confirmed individually.
Frequently Asked Questions
Which power supply fits the A7?
All standard 1756 supplies mount in the chassis supply bay: PA75/PA72 (AC), PB75/PB72 (DC), plus redundant PA75R pairs. Match the supply to your module count and line voltage.
Can I mix old and new 1756 modules in one A7?
Yes — the 1756 backplane is compatible across controller generations (5561/5570/5580) and I/O series. Check the backplane current budget against your power supply, and verify firmware/AOP compatibility for mixed-vintage communication modules.
Does the chassis need forced cooling?
No — official data specifies convection cooling. Panel-level thermal design (enclosure ventilation per the published minimum enclosure dimensions) remains the installer’s responsibility.
7 slots enough?
Count one slot for the power supply bay region plus controller, each network module, and each I/O card; leave expansion room. If tight, the A10/A13/A17 chassis share all module compatibility.
MODEL INQUIRY
Request this
reference.
Include a nameplate photo or full specification when revisions may differ.