PC-E984-485

Configured for logic execution and Modbus communication control in the Modicon 984 automation platform, the Schneider Electric PC-E984-485 (PC-E984-485 Programmable Controller) provides direct physical/electrical execution. The controller integrates 16K-word user RAM, 2K-word data storage, discrete I/O management, and Modbus RTU/Modbus Plus communication interfaces for industrial control processing.

Hardware Specifications

Parameter	Specification
Model	PC-E984-485
Brand	Schneider Electric
Product Line	Modicon 984
Product Type	Programmable Controller
Weight	1.39 kg
Operating Temp	0 deg C to 60 deg C
Power Consumption	Not specified
Power Supply	115/230 VAC, 50/60 Hz
User Memory (RAM)	16K words
Data Memory	2K words
Logic Solve Time	3 milliseconds per kiloword
State RAM Registers	1920
Discrete Inputs/Outputs	2048 points
Maximum I/O Bits per Drop	512 inputs / 512 outputs
Maximum Drops per System	6
Expansion Modules	Up to 2 remote racks
Communication Ports	1 Modbus RTU port, 1 Modbus Plus port
Relative Humidity	5 to 95 % without condensation
Storage Temperature	-25 deg C to 70 deg C

Modicon 984 Backplane and Communication Architecture

The PC-E984-485 operates within the Modicon 984 controller architecture with dedicated memory allocation for application logic, data registers, and state RAM operations. The controller supports distributed I/O configurations through remote rack expansion and manages up to 2048 discrete input/output points.

The integrated Modbus RTU and Modbus Plus communication ports provide serial data exchange with connected field devices and Modicon network components. System configuration depends on the selected I/O architecture, rack arrangement, and communication requirements.

Frequently Asked Questions

Q: What communication interfaces are integrated in the PC-E984-485?
A: The controller includes one Modbus RTU port and one Modbus Plus port for serial communication with compatible devices and Modicon network components.

Q: How is I/O capacity handled by the PC-E984-485 controller?
A: The controller supports up to 2048 discrete inputs/outputs, with each drop supporting up to 512 inputs and 512 outputs.

Q: Can the PC-E984-485 support remote I/O expansion?
A: The controller supports expansion through up to two remote racks within the Modicon 984 system configuration.

Field Installation Guidelines

Install the PC-E984-485 in a control cabinet with adequate mechanical support and protection from conductive contaminants. Verify the 115/230 VAC supply wiring before energizing the controller.

Use appropriate grounding practices for the cabinet enclosure and communication cable shields. Separate communication wiring from high-current power conductors to reduce electrical interference. Confirm Modbus RTU and Modbus Plus cable routing, termination, and connector integrity according to the network installation requirements.

Before commissioning, verify rack addressing, I/O allocation, communication parameters, and application memory configuration within the Modicon 984 system.

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