The Allen-Bradley 1756-A7XT is a ControlLogix-XT chassis with 7 slots and a part of the Bulletin 1756 ControlLogix Chassis series. Any module can be fitted into any of the seven slots that come with slot guides and a snap-on retention feature for easy and secure fitting.
It has been constructed only for horizontal back-panel mounting. It features direct mounting accommodation for any Bulletin 1756 power supply module. It is an essential component in building the modular ControlLogix system.
The 1756-A7XT Module is ideal for panel-mounting and requires a cabinet size with minimum dimensions of 20 x 24 x 8 inches. It weighs approximately 2.4 lb. It requires solid or stranded copper wire rated at 194 °F or greater with ratings of 8.3 mm² (8 AWG) for functional earth ground and 2.1 mm² (14 AWG) for protective earth ground.
The 1756-A7XT Chassis backplane provides high-speed communication between modules while distributing power to each module within the chassis. It is rated for extreme temperature environments and can withstand between -13 and 158 °F operating temperature range, with 5-95% noncondensing relative humidity. It features an advanced conformal coating that boosts survivability in ISA G3 environments.
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TCI Supply is not an authorized Allen Bradley Distributor
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number/Catalog No. | 1756-A7XT |
| Series | ControlLogix |
| Module Type | Chassis |
| Slots | 7 |
| Backplane Current (Chassis/Slot Max) | 1.2 V DC 1.5 A/-, 3.3 V DC 4 A/4 A, 5.1 V DC 15 A/6 A, 24 V DC 2.8 A/2.8 A (Series C; Varies with Revisions) |
| Isolation Voltage | Varies with Installed Power Supply and Modules |
| Enclosure Type | None (Open-Style) |
| Operating Temperature | -13-158 F (-25-70 C) |