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Schneider Electric Modicon 984 PC-A984-120

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PC-A984-120

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The PC-A984-120 from Schneider Electric is a compact processor module belonging to the Modicon 984 series. It accommodates 256 discrete I/O points and features memory capabilities including 1.5K words for user logic and 2K words for state RAM. Additionally, it supports Modbus communication and has provisions for co-processor integration.

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Technical specifications for PC-A984-120

ManufacturerSchneider Electric
Product LineModicon 984
Part NumberPC-A984-120
Weight1.00 lbs (0.45 kg)
NameCompact PLC processor module
Discrete I/O Capacity256 points
Scan Time5 ms per 1K words
MemoryUser Logic Memory: 1.5K words, State RAM: 2K words
Register I/O Capacity32 registers
InterfacePCMCIA interface for memory backup
Password ProtectionPLC-level password protection
Agency ApprovalsUL 508
Co-Processor SupportYes
Communication PortsModbus Plus: 1 port, Modbus RTU: 1 port
Relative Humidity5% to 95% (non-condensing)
Operating Temperature Range0°C to 60°C
Storage Temperature Range-25°C to 70°C
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The Schneider Electric PC-A984-120 is a compact programmable logic controller (PLC) processor module that belongs to the Modicon 984 series. This module is engineered to handle a maximum of 256 discrete I/O points, which makes it suitable for a variety of automation processes.

It has an efficient scan time of 5 milliseconds for every 1K words, facilitating quick data processing. The memory configurations include 1.5K words allocated for user logic and 2K words for state RAM, ensuring ample storage for functional logic. Additionally, it can manage 32 registers for further operational flexibility.

The PC-A984-120 module also supports a PCMCIA interface, providing a straightforward solution for memory backup. The implementation of PLC-level password protection enhances overall security for programming and data integrity.

For communication, this model is equipped with one Modbus Plus port and one Modbus RTU port, allowing for versatile network connectivity. The module's dimensions are compact at 7.6 cm in width, 12.7 cm in height, and 12.7 cm in depth, and the unit weighs 455 grams.

Environmental ratings for this module include operation in a temperature range from 0°C to 60°C and a storage temperature range from -25°C to 70°C. It is rated for relative humidity levels between 5% to 95% in non-condensing conditions. Additionally, it complies with regulatory standards such as UL 508, CSA 22.2 No. 142, and FM Class I, Division 2, as well as the European EMC Directive. Support for co-processors enhances functionality, making this processor module a robust choice for automation tasks.