Product Overview
Downtime on a Modicon Quantum control rack costs money by the minute. The Schneider Electric 140CPU11302C processor keeps those racks running with a 20 MHz clock speed and 109 kB of internal RAM. This is a practical, proven CPU for automation applications that need steady scan performance without a platform migration.
As a Modicon Quantum series processor, the 140CPU11302C handles both local and distributed I/O. Local racks support up to 64 inputs and 64 outputs. Distributed configurations accept 30 inputs and 32 outputs per module, scaling to 500 inputs and 500 outputs network-wide. For plants running legacy Quantum systems, that headroom matters.
Technical Specifications
Processing Performance
The 20 MHz clock speed and 109 kB internal RAM define what this CPU can do. Instruction processing runs 0.3 to 1.4 ms per 1K instruction (LL984), so scan times stay predictable as logic grows. A 250 ms watchdog timer monitors execution and flags faults before they cascade.
Communication and I/O
Two built-in ports cover integration: one Modbus RS232 and one Modbus Plus. The processor supports up to three distributed networks and two remote networks, giving engineers room to segment traffic across a plant.
Power and Environment
Bus current requirement is 780 mA. The unit operates from 32°F to 140°F (0°C to 60°C) at up to 95% relative humidity, non-condensing. A lithium battery rated 1.2 Ah delivers approximately 10 years of backup life, which cuts routine maintenance visits.
Where the 140CPU11302C Fits
Water and Wastewater Control
Distributed I/O capacity suits pump stations spread across a site. The CPU coordinates remote drops over Modbus Plus while local racks handle immediate interlock logic.
Manufacturing and Process Lines
A 0.3 to 1.4 ms scan range keeps high-speed sequencing responsive. Plants upgrading an existing Quantum rack can slot this processor in without re-engineering the I/O layout.
Oil, Gas and Energy Skids
Compact at 0.7 pounds (0.3 kg), the processor fits space-constrained panels. Modbus RS232 supports direct connection to HMIs and supervisory systems.
Selection Checklist
Before ordering, confirm your rack compatibility, required I/O counts, and network topology. Verify that Modbus RS232 and Modbus Plus match your existing cabling plan. If you run a mixed network, check whether a gateway or connection module is needed for your fieldbus devices, and confirm cable and gateway choices with your supplier.
Oil AutoTech supplies ready-to-ship spares for oil, gas and industrial automation applications, with fast dispatch worldwide and hands-on help selecting the right processor for your rack.
Reliability and Maintenance
Inspect the processor and rack connections periodically. Keep cabinet temperature within the rated 32°F to 140°F (0°C to 60°C) range and humidity below 95%, non-condensing. Replace the lithium battery on a planned schedule before its 10-year life expires to protect program memory. Follow the manufacturer’s safety manual for all service work.
Please verify current lifecycle status and availability with Oil AutoTech before ordering.
Frequently Asked Questions
What is the clock speed of the 140CPU11302C?
It runs at 20 MHz with 109 kB of internal RAM.
How fast does it process instructions?
Processing time is 0.3 to 1.4 ms per 1K instruction (LL984).
What communication ports does it include?
One Modbus RS232 port and one Modbus Plus port.
How much I/O can it handle?
Local racks support up to 64 inputs and 64 outputs. Distributed networks scale to 500 inputs and 500 outputs.
What is the battery life?
The lithium battery is rated 1.2 Ah with approximately 10 years of life.
Contact Oil AutoTech today for pricing and availability.
