Product details
PC-E984-275 Schneider Electric Modicon CPU Module
The PC-E984-275 is a CPU module from Schneider Electric. It fits into Modicon systems. This module runs on 24V DC. Also, it draws 1 Amp. Moreover, it brings strong memory and fast processing to your rack.
Why This CPU Stands Out
- Big memory – 512 KB handles large programs.
- Fast scan time – 2.5 ms/k keeps I/O moving.
- Many registers – 1920 registers store lots of data.
- Triple comm ports – 2 Modbus plus 1 Modbus+.
- Scalable racks – Up to 4 racks and 1 I/O drop.
Technical Data
- Brand: Schneider Electric
- Model: PC-E984-275
- Series: Modicon
- Type: CPU Module
- Weight: 3.00 lbs (1.36 kg)
- Voltage: 24V DC
- Current: 1 Amp
- Registers: 1920
- Memory: 512 KB
- Scan time: 2.5 ms/k
- Comm ports: 2 Modbus, 1 Modbus+
- Local I/O: 256
- Total I/O: 512/512
- I/O drops: 1
- Max racks: 4
Setup and Care
- Mount the CPU in a dry cabinet. Keep airflow clear.
- Feed it stable 24V DC. Check polarity before power-up.
- Use Modbus ports for HMI and SCADA links.
- Add racks only up to four. More racks need another CPU.
- Back up your program often. 512 KB fills up fast.
- Watch scan time. Large logic trees slow it down.
Compatibility Notes
- Works with Modicon 984 and related I/O bases.
- Talks to any Modbus or Modbus+ device.
- Fits racks that accept 984 series CPUs.
- Not for newer Momentum or M340 platforms.
- Third-party SCADA can poll it over Modbus.
Certifications and Packing
- CE marked for European use.
- RoHS and WEEE compliant.
- 1 x PC-E984-275 CPU module
- 1 x quick start guide
- 1 x original box
Warranty and Shipping
- 12-month warranty on defects.
- Ships in 12–24 hours after payment.
- Couriers: FedEx, UPS, DHL.
- Tracking number sent same day.
Expert Review
What This CPU Does Well
The PC-E984-275 is a workhorse for older Modicon lines. It packs 512 KB and 1920 registers. Moreover, its 2.5 ms/k scan time is quick for its class. The triple comm ports cut extra hardware needs.
Where It Falls Short
However, it only supports one I/O drop and four racks. So, very large systems need more. Also, it is not for new designs. Therefore, buy it for retrofits, not greenfield projects.
Manager’s Insight
Why Retrofits Choose It
Many plants still run 984 racks. For example, water plants and old assembly lines. This CPU drops right in. Consequently, you avoid a full controls upgrade. That saves time and money.
One Practical Tip
Order a spare. Downtime on a legacy line costs more than the module. Also, label your Modbus+ cable. It is easy to mix up with Modbus.
Best Fit Devices and Applications
- Modicon 984 racks – direct replacement.
- Legacy SCADA systems – poll over Modbus.
- Water and wastewater plants – stable, slow processes.
- Old assembly lines – keep them running.
- Small process cells – up to 512 I/O points.
- HMI panels – connect via Modbus port.
Compare With Other Models
- 170ENT11002 – Ethernet adapter, not a CPU.
- PC-E984-265 – less memory, lower cost.
- PC-E984-285 – more I/O, higher price.
- 140CPU11302 – newer platform, different racks.
- BMXP342020 – M340 series, modern choice.
FAQ
Power and Wiring
Q: What voltage does this CPU need?
A: 24V DC. It draws 1 Amp.
Q: Can I use 12V DC instead?
A: No. 12V will not power it. You need a 24V DC supply.
Memory and Performance
Q: How much memory does it have?
A: 512 KB. That holds a medium-sized program.
Q: What is scan time?
A: 2.5 ms per k of logic. Faster logic means quicker response.
Communication and Expansion
Q: How many comm ports does it offer?
A: Three. Two Modbus and one Modbus+.
Q: Can I add more racks later?
A: Yes, up to four racks. Plus one I/O drop.
Buying and Support
Q: Is this CPU still in production?
A: Schneider may phase it out. So, check stock with us first.
Q: What warranty do you offer?
A: 12 months. It covers manufacturing defects only.
Q: How fast do you ship?
A: Within 12 to 24 hours. We use FedEx, UPS, or DHL.
Q: Do you test before shipping?
A: Yes. Every unit gets a basic power and comm check.
Q: Can I return it if it does not fit?
A: Yes. Contact us within the return window. Keep the original box.
Buying Guide
Check Your Rack First
Confirm your rack takes 984 series CPUs. Not all Modicon racks do. Count your I/O points. Stay under 512.
Plan Your Network
Decide if you need Modbus+ or plain Modbus. Both are on board. Label your cables to avoid mix-ups.
Stock and Spares
Legacy parts sell out fast. Buy a spare if uptime matters. Also, ask us about bulk pricing.
Contact us for stock, quotes, or help:
- Email: sales@powergearx.com
- WhatsApp: +86 18030005825
Copyright © 2026 Powergear X Automation Limited. All rights reserved.
Original Source: https://www.powergearx.com/
There are no reviews yet.