Schneider PC-E984-285 Modicon CPU 32k Logic Memory

PC-E984-285 Modicon CPU Module

Product Introduction

The Schneider Electric PC-E984-285 stands as a capable central processor within the Modicon controller family. This unit provides 32k of logic memory for executing sophisticated control routines and 64k of data memory for managing extensive process variables. It handles 1,920 internal registers, offering substantial capacity for data manipulation and storage. Furthermore, the processor achieves a scan time of just 2.5 milliseconds per k, ensuring rapid response to field inputs. Its communication suite includes two Modbus ports and one Modbus+ port, enabling flexible integration with drives, HMIs, and supervisory systems. Consequently, the PC-E984-285 represents a balanced solution for mid-range automation projects.

Memory and Processing Performance

This CPU distinguishes itself through its robust memory architecture tailored for complex logic and data handling. Specifically, the 32k logic memory accommodates large ladder logic programs and function blocks without performance degradation. Meanwhile, the 64k data memory provides ample space for historical data, alarm logs, and real-time process values. The 1,920 registers further enhance its data management capabilities, allowing engineers to store and retrieve critical parameters efficiently. With a scan time of 2.5 ms/k, the PC-E984-285 processes inputs and updates outputs with minimal delay, making it suitable for time-sensitive control loops.

• Logic Memory: 32k (Supports complex programming)

• Data Memory: 64k (Extensive process data storage)

• Registers: 1,920 (Flexible data handling)

• Scan Time: 2.5 ms/k (Fast and deterministic)

• Total I/O Capacity: 512 inputs / 512 outputs

I/O and System Expansion

The PC-E984-285 provides substantial I/O capacity for diverse field device integration. It supports 256 local I/O points directly connected to the base chassis. Additionally, it addresses a total of 512 discrete inputs and 512 discrete outputs, offering extensive connectivity for sensors, actuators, and relays. This processor manages one I/O drop, simplifying distributed I/O architectures. It also accommodates up to four maximum racks, enabling system expansion without replacing the core controller. This scalability makes the PC-E984-285 a practical choice for growing production lines.

• Local I/O: 256 points (Direct chassis connection)

• Total I/O: 512 inputs / 512 outputs

• I/O Drops: 1 drop supported

• Maximum Racks: Up to 4 racks for expansion

Communication Ports and Networking

Connectivity remains a strong point for this Modicon CPU. It features two dedicated Modbus ports that support standard serial communication with a wide range of industrial equipment. Moreover, the integrated Modbus+ port enables high-speed peer-to-peer networking between multiple controllers and supervisory stations. This combination allows the PC-E984-285 to function effectively in both standalone and networked automation environments. System integrators can leverage these ports for data acquisition, remote monitoring, and coordinated control strategies across large facilities.

• Modbus Ports: 2 (Standard serial connectivity)

• Modbus+ Port: 1 (High-speed peer networking)

• Protocol Support: Modbus messaging compliant

Installation and Rack Configuration

Installing the PC-E984-285 follows the standard Modicon rack-based procedure. First, insert the CPU module into the designated slot of the chassis, ensuring firm seating and proper backplane connection. Next, connect your 24V DC power supply to the dedicated terminals. Then, attach field wiring to the I/O modules according to your system layout. For network integration, link your Modbus and Modbus+ devices using appropriate shielded cables. Finally, configure the processor's parameters using the programming software and verify scan time performance. This straightforward process ensures minimal setup time.

Logistics and Shipping

We prioritize swift delivery for all industrial automation components. Orders for the Schneider PC-E984-285 are shipped using premium express carriers. All shipments are dispatched via FedEx, UPS, or DHL to provide reliable tracking and timely global delivery.

Packaging List

• Schneider Electric PC-E984-285 CPU Module (1 unit)

• Standard rack mounting hardware

• Anti-static protective packaging

• Quick installation reference card

Frequently Asked Questions (FAQ)

1. What memory capacities does the PC-E984-285 offer?
This processor provides 32k of logic memory for program execution and 64k of data memory for storing process variables and historical information.

2. How fast is the scan time on this CPU module?
The Schneider PC-E984-285 achieves a scan time of 2.5 milliseconds per k, ensuring responsive handling of critical control tasks.

3. What communication protocols does this CPU support?
It supports standard Modbus via two ports and Modbus+ via a dedicated port, enabling connectivity with diverse field devices and supervisory networks.

4. How many I/O points can this processor handle?
The PC-E984-285 supports 256 local I/O points and a total addressing capacity of 512 inputs and 512 outputs.

5. Can I expand this system with additional racks?
Yes, this CPU supports up to four maximum racks, providing flexibility to scale your control system as operational needs grow.