ABB 200-CPU40/40 CPU | 4 MB Memory, 2x Ethernet

This CPU module serves as the main controller for ABB AC500 systems. The ABB 200-CPU40/40 executes user logic programs with high speed. You can manage discrete and analog I/O through this processor. Its integrated communication ports simplify network integration.

Physical Dimensions and Hardware Layout

The ABB 200-CPU40/40 measures 12.2 cm in module width. Its total depth reaches 14.5 cm including connectors. This processor unit weighs approximately 0.42 kg. A backlit LCD screen shows system diagnostic messages. Meanwhile, multiple status LEDs indicate run, stop, and error conditions.

Memory Capacity and Processing Power

This CPU contains 4 MB of user program memory. The module also includes 4 MB of data memory space. Processing speed reaches 0.08 µs per bit operation. The ABB 200-CPU40/40 handles up to 1024 digital I/O points. Additionally, it manages 256 analog I/O channels simultaneously.

Parameter	Specification
Product Type	Central Processing Unit (CPU)
User Program Memory	4 MB
Data Memory	4 MB
Retentive Memory	128 kB
Processing Speed	0.08 µs per bit operation
Digital I/O Capacity	1024 points
Analog I/O Capacity	256 channels
Integrated Ports	2x Ethernet, 1x RS‑485, 1x USB
Ethernet Protocols	Modbus TCP, PROFINET, EtherNet/IP
Real‑Time Clock	Yes, with 7 days backup
Dimensions (W x D)	122 mm x 145 mm
Weight	0.42 kg (0.93 lbs)
Backplane Current Draw	350 mA @ 5V DC
Power Dissipation	2.2 W max
Energy Storage	100 µF capacitor + lithium battery
Battery Type	CR2032 lithium (field replaceable)
Program Cycle Time	1 ms for 1k instructions

Energy Storage and Data Retention

Internal capacitors maintain program execution during short power dips. A CR2032 lithium battery preserves retentive memory for 7 days. The ABB 200-CPU40/40 stores all variable values safely during shutdown. Consequently, you avoid reloading programs after power restoration.

Communication Interfaces and Networking

Two independent Ethernet ports support daisy‑chain topologies. The RS‑485 port handles Modbus RTU connections to field devices. You can also use the USB port for program uploads and diagnostics. This CPU supports real‑time communication with remote I/O racks.

Programming and Diagnostic Features

You program the ABB 200-CPU40/40 using Automation Builder software. Supported languages include ladder logic and function block diagrams. The built‑in LCD shows error codes and IP addresses directly. Consequently, troubleshooting becomes faster without external tools.