1756-A7 AB
About 1756-A7
Allen Bradley 1756-A7 is a seven (7) slot enclosure from the ControlLogix Programmable Automation Controller (PAC) platform. This hardware is an important component of building the ControlLogix control system into a chassis, such as the 1756-A7 providing backplane connections and allowing modules to be installed in the provided module slots.
The 1756-A7 also comes with a power installation slot, located on the far left side of the chassis. This chassis supports ultra-thin, standard, and power supplies.
The 1756-A7 is installed directly onto the sub panel of the enclosure through the four (4) mounting plates provided. Its physical dimensions are 50.8 x 60.9 x 20.3 centimeters (20 x 24 x 8 inches), and its weight is approximately 1.10 kilograms (2.4 pounds). The overall size of 17560A7 may vary depending on the type of power supply used. The chassis also provides functional grounding and protective grounding terminals. The recommended type and size of functional grounding wire is 8.3 square millimetre (8 AWG) solid or stranded copper wire with insulation rating of 90 ° C (194 ° F) or higher, while for protective grounding terminals, the appropriate wire size is 2.1 square millimetre Mm (14 AWG) solid or stranded copper wire with insulation grade of 90 ° C (194 ° F) or higher.
The operating heat dissipation rate of 1756-A7 is 6.1 BTU per hour, and the maximum operating power is 1.8 watts. The backplane current of 1756-A7 is 2.8 A at 24 V, 6 A or 15 A at 5.1 V, 1.5 A at 1.2 V, and 4 A at 3.3 V. In addition, the shipping dimensions of the 1756-A7 chassis are 50.8 x 60.9 x 20.3 centimeters or 20 x 24 x 8 inches. It weighs 2.4 pounds. The measured operating temperature range is 0 to 60 degrees Celsius or 32 to 140 degrees Fahrenheit. The recommended storage temperature range is -40 to 85 degrees Celsius. In addition, the compatible humidity type of 1756-A7 is non condensing, and the relative humidity that the chassis can use is 5% to 95%. The impact rating of the chassis is 30 G (acceleration) in operating mode, and 50 G (acceleration) in non operating mode. On the other hand, the 1756-A7 has an open housing that allows users to easily install it. In addition, it uses 8.3 square millimetre (14 AWG) stranded or solid copper wire with a rated temperature of 194 degrees Fahrenheit (90 degrees Celsius) or higher as a functional grounding and 2.1 square millimetre wire (14 AWG) for protective grounding.
1756-A7
Description: The Allen Bradley/Rockwell Automation 1756-A7 chassis is a compact and compact chassis designed specifically for Allen Bradley ControlLogix systems. This chassis is one of the smallest ControlLogix chassis available, with only 2 installation tabs at the top and 2 installation tabs at the bottom. The 1756-A7 chassis can be installed with or without 2 SEM screws, but if installed without SEM screws, in addition to 2 flat washers and 2 lock washers, 2 star washers are also required. In addition, this chassis requires 4 Phillips screws if it does not have SEM screws, and only 2 Phillips screws if used with SEM screws. The 1756-A7 chassis is an open device without a protective casing.
