The Allen-Bradley 1756-A7 is a Seven (7) slot chassis from the ControlLogix Programmable Automation Controller (PAC) platform. This hardware is an essential component in building a ControlLogix control system as chassis, such as the 1756-A7 provides backplane connection and allows module to be installed in the provided module insertion slots.
The 1756-A7 also hosts the mounting slot for the Power supply, located at the left most side of the chassis. This chassis supports slim, standard and power supplies.
The 1756-A7 is mounted directly to the enclosure’s subpanel via the provided Four (4) mounting tabs. It has physical dimensions of 50.8 x 60.9 x 20.3 cm (20 x 24 x 8 in.) and weighs approximately 1.10 kg (2.4 lb). Depending on the type of power supply used, the overall dimension of the 17560A7 varies. This chassis is also provided with a functional earth ground and protective earth ground terminals. Recommended wire type and size for the functional earth is an 8.3 sq. mm (8 AWG) solid or stranded copper wire with insulation rating of 90 °C (194 °F) or greater while for protective earth terminal, appropriate wire size is 2.1 sq. mm (14 AWG) solid or stranded copper wire with insulation rating of 90 °C (194 °F) or higher.
