Technical specifications for 1756-A4

Part Number/Catalog No.	1756-A4
Slots	4
Module Type	Chassis
No. of Slots	Four (4)
Power Dissipation (Max)	4 Watts
Mounting	Horizontal
Dimensions	20 x 20 x 8 inches
Weight	1.7 pounds (0.75 kilograms)
Enclosure	Open
Backplane Current (5 Volts DC)	10 amps
Backplane Current (24 Volts DC)	2.8 Amps
Available Series	Series A, B, C

The 1756-A4 is a Chassis designed to house various modules and provide power distribution. This 4-slot chassis has a power dissipation of 1.8W and operates with a backplane current of 1.5 A at 1.2 V DC, 4 A at 3.3 V DC, 15 A at 5.1 V DC, and 2.8 A at 24 V DC. Its compact dimensions of 50.8 x 50.8 x 20.3 cm (20 x 20 x 8 in.) and weight of 1.7 lbs make it suitable for horizontal mounting inside panels with an open enclosure design.

The chassis backplane facilitates high-speed communication between modules and ensures power distribution across all attached modules. With the Removal and Insertion Under Power (RIUP) feature, it offers easy maintenance, while electronic keying prevents replacement errors.

Designed to accommodate modules, the 1756-A4 chassis has four slots for processors, I/O modules, communication adapters, specialty modules, and third-party modules. It includes a built-in electronic backplane that distributes power to each module. Additionally, the chassis provides an interface for a system power supply, which is not included in the slot count. The minimum-rated power supply is capable of powering all attached modules efficiently.

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