OVERNIGHT DELIVERY24/7 TECH SUPPORT2 YEAR WARRANTY

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The 1747-L511 SLC Processor contains 1K instructions of user memory, max. The number of I/O for 1747L511 is 960 absolute maximum (local). Program scan time is 8ms (typ), local analog I/O (max) is 480, and I/O scan time is 2.6ms (typ). Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is eeprom, battery-backed RAM is optional. Processor contains a backplane current load of 350mA at 5V DC or 105mA at 24V DC.
The 1747-L514 SLC Processor contains 4K instructions of user memory, max. The number of I/O for 1747L514 is 960 absolute maximum (local). Program scan time is 8ms (typ), and I/O scan time is 2.6ms (typ). The SLC processor has a local analog I/O, max. of 480. Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is eeprom, battery-backed RAM is optional. Processor contains a backplane current load of 350mA at 5V DC or 105mA at 24V DC.
The 1747-L524 SLC Processor contains 4K instructions of user memory, max. The number of I/O for 1747L524 is 4096 in + 4096 out absolute maximum. Local analog I/O, max. for the processor is 480. It has a program scan time of 4.8ms (tpy), and I/O scan time of 1.6ms (typ). Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is eeprom, battery-backed RAM is standard. Processor contains a backplane current load of 350mA at 5V DC or 105mA at 24V DC.
The 1747-L531 SLC Processor contains 8K words total (4K words for data or prog.; 4K words for data only) user memory, max. The number of I/O for 1747L531 is 4096 in + 4096 out absolute maximum. Local analog I/O, max, for the processor is 480. It has a program scan time of 1ms (typ), and I/O scan time of 0.225ms (typ). Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is flash, battery-backed RAM is standard. Processor contains a backplane current load of 500mA at 5V DC or 175mA at 24V DC.
The 1747-L532 SLC Processor contains 16K words total (12K words for data or prog.; 4K words for data only) user memory, max. The number of I/O for 1747L532 is 4096 in + 4096 out absolute maximum. Local analog I/O, max, for the processor is 480. It has a program scan time of 1ms (typ), and I/O scan time of 0.225ms (typ). Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is flash, battery-backed RAM is standard. Processor contains a backplane current load of 500mA at 5V DC or 175mA at 24V DC.
The 1747-L533 SLC Processor contains 32K words total (28K words for data or prog.; 4K words for data only) user memory, max. The number of I/O for 1747L533 is 4096 in + 4096 out absolute maximum. Local analog I/O, max, for the processor is 480. It has a program scan time of 1ms (typ), and I/O scan time of 0.225ms (typ). Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is flash, battery-backed RAM is standard. Processor contains a backplane current load of 500mA at 5V DC or 175mA at 24V DC.
The 1747-L541 SLC Processor contains 16K words total (12K words for data or prog.; 4K words for data only) user memory, max. The number of I/O for 1747L541 is 4096 in + 4096 out absolute maximum. Local analog I/O, max, for the processor is 480. It has a program scan time of 0.9ms (typ), and I/O scan time of 0.225ms (typ). Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is flash, battery-backed RAM is standard. Processor contains a backplane current load of 1A at 5V DC or 0A at 24V DC.
The Allen-Bradley 1747-L542 provides key functionality to control any mid-size application. 
The 1747-L543 SLC Processor contains 64K words total (60K words for data or prog.; 4K words for data only) user memory, max. The number of I/O for 1747L543 is 4096 in + 4096 out absolute maximum. Local analog I/O, max, for the processor is 480. It has a program scan time of 0.9ms (typ), and I/O scan time of 0.225ms (typ).  Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is flash, battery-backed RAM is standard. Processor contains a backplane current load of 1A at 5V DC or 0A at 24V DC.
The 1747-L551 SLC Processor contains 16K words total (12K words for data or prog.; 4K words for data only) user memory, max. The number of I/O for 1747L551 is 4096 in + 4096 out absolute maximum. Local analog I/O, max, for the processor is 480. It has a program scan time of 0.9ms (typ), and I/O scan time of 0.225ms (typ).  Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is flash, battery-backed RAM is standard. Processor contains a backplane current load of 1A at 5V DC or 0A at 24V DC.
The 1747-L552 SLC Processor contains 32K words total (28K words for data or prog.; 4K words for data only) user memory, max. The number of I/O for 1747L552 is 4096 in + 4096 out absolute maximum. Local analog I/O, max, for the processor is 480. It has a program scan time of 0.9ms (typ), and I/O scan time of 0.225ms (typ).  Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is flash, battery-backed RAM is standard. Processor contains a backplane current load of 1A at 5V DC or 0A at 24V DC.
The 1747-L553 SLC Processor contains 64K words total (60K words for data or prog.; 4K words for data only) user memory, max. The number of I/O for 1747L553 is 4096 in + 4096 out absolute maximum. Local analog I/O, max, for the processor is 480. It has a program scan time of 0.9ms (typ), and I/O scan time of 0.225ms (typ).  Number of I/O module slots in the local I/O chassis (max) is 30; number of local I/O chassis (max) is 3. Backup memory is flash, battery-backed RAM is standard. Processor contains a backplane current load of 1A at 5V DC or 0A at 24V DC.