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Description
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 1746-A10 |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Type | PLC I/O Chassis (SLC 500 Modular Chassis) |
| Number of Slots | 10 module slots (power supply mounts separately at left end) |
| Backplane Current | 5.1V DC @ 10 A; 24V DC @ 2.88 A |
| Expansion Capability | Up to 2 additional chassis (3 total, max 30 I/O slots) |
| Interconnect Cables | 1746-C9, 1746-C7 |
| Mounting Type | Panel mount, 6 mounting tabs, M4 or M5 (#10 or #12) screws with star washers |
| Cooling Method | Natural convection |
| Enclosure Type | Open type (requires industrial enclosure) |
| Dimensions (H×W×D) | 17.1 × 39.7 × 14.5 cm (6.73 × 15.34 × 5.71 in.) |
| Weight | Approx. 1.5 kg (3.3 lb) without modules |
| Operating Temperature | 0 °C to +60 °C (32 °F to 140 °F) |
| Storage Temperature | −40 °C to +85 °C (−40 °F to 185 °F) |
| Relative Humidity | 5% to 95% non-condensing |
| Vibration / Shock | 5 g @ 10–500 Hz operating; 30 g operating shock |
| Grounding Requirements | 14 AWG chassis ground, 10 AWG to ground bus, 8 AWG minimum to ground electrode |
| Compatible Power Supplies | 1746-P1, 1746-P2, 1746-P3, 1746-P4, 1746-P5, 1746-P6, 1746-P7 |
| Certifications | UL, cUL, CE, GOST-R, KCC, marine approvals (ABS, DNV, GL, LR, BV, KRS) |
| Lifecycle Status | Discontinued by Rockwell Automation as of March 31, 2024 |
Main Features and Advantages
Generous power budget for dense I/O loading: the 1746-A10 delivers up to 10 A on the 5.1V DC logic rail and 2.88 A on the 24V DC auxiliary rail, which is the same backplane capacity offered by the larger 1746-A13. This means engineers can populate all ten slots with current-hungry modules — such as analog input cards, high-density DC output blocks and communication adapters — without the power supply becoming the limiting factor. Calculating the 5V and 24V load of each module against this budget is straightforward, which simplifies rack design and reduces the risk of intermittent resets caused by an under-rated supply.Scalable architecture without changing the processor: one of the most practical advantages of the 1746-A10 is its ability to grow with the machine. Using 1746-C9 or 1746-C7 chassis interconnect cables, a system can be expanded from a single ten-slot rack to three linked chassis for a total of thirty I/O slots, all addressed by the processor installed in the leftmost slot of the group. This lets a plant add a conveyor section, a second packaging station or a new skid of instrumentation years after the original commissioning, without replacing the CPU or rewriting the existing logic structure.Robust mechanical design for long service life: the 1746-A10 uses six mounting tabs rather than four, distributing weight more evenly across the enclosure back panel and resisting the flexing that can misalign backplane connectors under vibration. The all-metal frame with integral card guides keeps modules firmly seated, while the open-type, convection-cooled construction eliminates fans and air filters that would otherwise require periodic cleaning in dusty plants. Paired with the specified grounding practice — a 14 AWG chassis conductor, a 10 AWG bonding jumper to the ground bus and an 8 AWG or larger conductor to the earth electrode — the 1746-A10 provides excellent noise immunity and ESD protection for the backplane.Field-proven and easy to service: because the SLC 500 platform has been installed worldwide since the early 1990s, the 1746-A10 is supported by an enormous installed base of documentation, spare modules and technician familiarity. Modules slide in and out along the card guides without special tools, and the modular nature of the chassis means a damaged rack can be replaced while the I/O modules and processor are transferred across. This modularity, combined with the fact that Rockwell classifies the chassis as repairable, makes the 1746-A10 a practical choice for keeping legacy production assets online.
