1756-A7  Seven (7) slot chassis

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.

1756-A7

The operational thermal dissipation rate of the 1756-A7 is valued at 6.1 BTU per hour and the maximum operational power

is rated at 1.8 Watts. The backplane current of the 1756-A7 is 2.8 Amps at 24 Volts, 6 Amps or 15 Amps at 5.1 Volts, 1.5 Amps

at 1.2 Volts, and 4 Amps at 3.3 Volts. Moreover, the 1756-A7 chassis shipping dimensions are 50.8 x 60.9 x 20.3 in centimeters

or 20 x 24 x 8 in inches. It weighs 2.4 pounds. The measured operating temperature range is from 0 to 60 degrees Celsius or 32

to 140 degrees Fahrenheit. The suggested storage temperature range is from -40 and 85 degrees Celsius. Besides, the compatible

humidity type for the 1756-A7 is non-condensing and the relative humidity level the chassis can be used at is 5 to 95%.