The Schneider PCE984385 delivers reliable processing power for Modicon Quantum control applications. This 984CPU module features 16K user memory and 2K data memory with dual Modbus communication ports.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Schneider Electric |
| Part Number | PCE984385 |
| Product Category | CPU Module / Controller |
| Series | Modicon Quantum 984 |
| Processor Type | 984 Family |
| User Program Memory | 16K words |
| User Data Memory | 2K words |
| Power Supply Input | 115/230 VAC or 24 VDC |
| Communication Ports | 2 x Modbus RS-232/485 |
| Mounting Type | Quantum rack mounting |
| Bus Current Draw | 1.2 A @ 5 VDC typical |
| Dimensions | 260 mm x 110 mm x 40 mm (approx.) |
| Weight | 0.85 kg (approx.) |
| Battery Backup | Lithium, 5+ year service life |
| Program Retention | 30 days typical without power |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5% to 95% non-condensing |
| Certifications | UL, CSA, CE |
| RoHS Status | Compliant |
Dual-Power Supply Flexibility
The Schneider PCE984385 accepts either 115/230 VAC or 24 VDC input power without module modification. This dual-voltage capability simplifies global machine design and reduces spare parts inventory for multinational manufacturers.
An internal auto-ranging power supply accepts 100-240 VAC or 18-36 VDC. The module automatically detects and configures itself for the connected power source.
Memory Architecture and Capacity
This 984CPU provides 16K words of user program memory for ladder logic, sequential function charts, and instruction list programming. This capacity supports medium-scale automation applications with several hundred I/O points.
2K words of dedicated data memory store register values, timers, counters, and system status information. Battery backup preserves all data memory during power interruptions.
Dual Modbus Communication Ports
Two independent Modbus ports enable simultaneous communication with programming workstations, HMI panels, and supervisory systems. Port 1 typically connects to Unity Pro or Concept programming software during commissioning.
Port 2 remains available for operator interface terminals or SCADA system integration. Each port configures independently for RS-232 or RS-485 electrical interface.
Mechanical Design and Form Factor
Weighing approximately 0.85 kg, this CPU module occupies a single slot in Modicon Quantum racks. Its dimensions of 260 mm x 110 mm x 40 mm include the integrated power supply section.
Front-panel LED indicators display processor status, battery condition, communication activity, and power supply health. Operators verify system status at a glance without software tools.
System Integration with Quantum Platform
The PCE984385 serves as the central processing element for Modicon Quantum I/O systems. The module connects directly to the Quantum backplane, communicating with discrete, analog, and special function modules.
Compatible I/O modules include 140DDI digital input, 140DDO digital output, 140ACI analog input, and 140ACO analog output series. The 984 architecture supports up to 32 local I/O modules per rack.
Energy Storage and Memory Retention
An internal lithium battery provides memory backup for approximately five years under normal operating conditions. This non-replaceable battery maintains program and data integrity during extended power outages.
Supercapacitors supplement the battery during short interruptions. The module retains program memory for a minimum of 30 days without main power at 25°C ambient temperature.
Programming Environment Support
The PCE984385 supports multiple programming software platforms. Engineers use Concept, ProWORX 32, or Modsoft for ladder logic development and system configuration.
All three software packages provide online monitoring, forcing, and program editing capabilities. Users select their preferred environment based on legacy support requirements.
Application Versatility
Industrial facilities deploy the Schneider PCE984385 across numerous control applications. Typical implementations include material handling systems, packaging machinery, water treatment plants, and building automation systems.
The 984 instruction set includes advanced math, PID control, and matrix operations. These capabilities support both discrete manufacturing and continuous process applications.
Power Supply Characteristics
The integrated power supply delivers 1.2 A at 5 VDC to the Quantum backplane for I/O module operation. This capacity supports fully loaded racks with mixed digital and analog modules.
Separate field power terminals accept AC or DC control voltage for input module wetting and output load switching. This isolation separates logic power from I/O power for enhanced noise immunity.
Communication Protocol Support
Each Modbus port supports RTU and ASCII transmission modes with programmable baud rates from 1200 to 19200 bps. The module responds to standard Modbus function codes for bit and register access.
Peer-to-peer communication uses Modbus Plus protocol when equipped with optional coprocessor modules. This networking capability distributes control across multiple processors.
Details
| Weight | 0.91 kg |
|---|---|
| Dimensions | 110 × 55 × 90 mm |
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