PRODUCT DETAILS
1756-A10 — 1756 Ten-Slot Logix Chassis
The 1756-A10 is a 10-slot chassis for the 1756 Logix modular control system, providing room for a processor plus up to nine additional modules on the shared backplane. It's the natural step up from the 7-slot chassis for builds where the planned module count is too high for 7 slots but doesn't yet justify the larger 13 or 17-slot frames — covering systems with a processor, multiple communication modules, and a meaningful spread of digital and analog I/O.
Specifications
| Parameter | Value |
|---|---|
| Part Number | 1756-A10 |
| Total Slots | 10 |
| User Module Slots | 9 (Slot 0 = processor; Slots 1–9 = I/O/comm) |
| Power Supply Slot | Dedicated, left end (separate from the 10-slot count) |
| Module Compatibility | All standard 1756-series modules |
| Mounting | Panel surface or DIN rail adapter |
| Operating Temperature | 0°C to 60°C |
When the Extra Capacity Actually Pays Off
- Systems integrating multiple networks (EtherNet/IP plus a legacy fieldbus) typically need two communication module slots before any I/O is even considered.
- Process applications with both digital and analog I/O spread across several modules consume slots faster than pure digital-only systems with the same point count, since analog modules carry fewer channels per slot.
- Projects with a known future expansion — an additional machine zone, more sensors, or a safety system retrofit — benefit from reserving slots now rather than facing a chassis change later, which involves rewiring and requalification effort beyond just the hardware cost.
FAQ
Q: Can I/O modules from a 7-slot chassis be moved directly into a 10-slot chassis?
Yes. All standard 1756-series modules are chassis-size agnostic — they install in any compatible 1756 chassis regardless of slot count, with no module-level reconfiguration required for the move itself.
Q: Does a 10-slot chassis require a larger power supply than a 7-slot chassis?
Not necessarily — power supply sizing depends on the actual backplane current draw of the installed modules, not the chassis slot count itself. A lightly populated 10-slot chassis may need the same supply as a fully populated 7-slot chassis.
Q: Is there a performance difference between a 7-slot and 10-slot chassis for the same processor and modules?
No inherent performance difference exists between chassis sizes themselves — backplane communication characteristics are consistent across the 1756 chassis family. Performance is governed by the processor, the modules installed, and the overall I/O configuration, not the number of available slots.
Q: Can a 10-slot chassis be mounted in the same panel space designed for a 7-slot unit?
No — the 10-slot chassis is physically longer than the 7-slot version. Panel space must be planned for the actual chassis dimensions before committing to a particular slot count, especially in retrofit projects with fixed panel footprints.



