CPU with 128K User Memory

Replaces Siemens 545-1103 and 545-1105 with no rewiring

CPU with 256K User Memory

Replaces Siemens 545-1101, 545-1102, 545-1104, 545-1106 with no rewiring

CPU with 512K User Memory

Replaces Siemens 555-1101, 555-1103, 555-1105 with no rewiring

CPU with 3072K User Memory

Replaces Siemens 555-1102, 555-1104, 555-1106 with no rewiring

Application Coprocessor

Auxiliary controller that enhances the capabilities of all CTI 2500 Series and SIMATIC 505 PLC systems

Ethernet Communications Coprocessor

Supports CAMP Server, CAMP Client, Modbus Server, Modbus Client, Network Data Exchange

Fast Ethernet TCP/IP Adapter (100 Mbit)

Direct replacement for 2572-A

Compatible with CTI 2572-A, CTI 2572, and Siemens 505-CP2572

Profibus Slave Adapter

2577 allows a Profibus Master to read any PLC V, WX, X, and C memory location and write any V, WY, and C memory location over Profibus

Serial Interface Adapter w/Modbus

Provides support for communicating with serial and Modbus plant floor devices such as modems, bar code readers, scales, displays, printers, and other PLCs

Redundant Processor Manager

Automatic backup solution for 2500 Series PLCs