Central Processing Unit with Serial Links (CPS, CPF)

Central Processing Unit with Serial Links (CPS, CPF)

EKE Trainnet® CPS Front EKE Trainnet® CPS Side


EN 50155
EN 45545

EIC 61131

Dimensions (W x H x D):
4 TE x 3 U x 160 mm
255 g
Input Power:
5 V DC ± 5 % (1.5 A max., 1 A typ.)
Temperature Range (operational):
-40 °C…+70 °C
MTBF (40 ºC ambient temperature):
1 340 000 h
Ethernet Interface:
1 x 10/100 Mbit M12 connector
Serial Interfaces:
3 isolated RS 485 on front
1 RS 485 on back for I/Obus connectivity
Boot Flash Memory:
8 MB
File System Flash Memory:
512 MB
Event Logging Flash Memory:
512 MB (CPS2258B)
4 GB (CPF3027B)
16 GB (CPF3575B)

Processor RAM:

64 MB

VME Bus (IEC 821) Interface:
A24/D16 Master or Slave

module functions

The Trainnet® CPS can be used as a processor to manage train computers and sub-systems connected to them. The Trainnet® CPS can be used to develop, store and run applications for the control and diagnostics of on-board systems, making it suitable to develop Train Control and Management Systems (TCMS) or Vehicle Control Units (VCU). It can also implement Gateway functionnalities by providing the necessary interfaces and routing capabilities

key features

The Trainnet® CPS Module is a processing unit providing serial communication interfaces. Three (four as an option) programmable isolated asynchronous or bit-synchronous SCC channels are available (RS 485) for connection to compatible devices in the train.

A 10/100 Mbit/s Full Duplex Ethernet interfaces can be used to connect to any Ethernet Communication Network, typically connecting the CPS with switches or other electronic racks. The Ethernet interface can alternatively be directly connected to any Ethernet enabled devices (e.g. network cameras). The number of Ethernet interfaces can be increased with one of the Trainnet® Ethernet Switches.

The ISaGRAF® PLC kernel embedded in the CPU acts as the CPU's operating Software. Train management applications can be developed with the ISaGRAF® PLC Software in order to create the desired control and diagnostic functions of the train. The open platform runs on the Linux Operating Software and supports further Software development in C language, either as an ISaGRAF® extension or on top of the module’s Linux kernel. The PowerPC processor provides enough processing power for demanding applications with 400 MHz core speed and 64 megabytes of 64-bit wide 100 MHz SDRAM.

The Trainnet® CPS real-time clock is powered by a back-up capacitor and will run for a minimum of 30 days from the time power is no longer applied.

A PST interface (usually serial link or Ethernet) enables the use of the Trainnet® Portable System tester (PST) as well as other tools for event log operations, maintenance, debugging, downloading and application development purposes.


Event logging memory:
Trainnet® CPF modules are similar to Trainnet® CPS with extended event logging flash memory capacities (16 GB or 4 GB vs 512 MB). Trainnet® CPF modules can act as low cost event recorders when limited memory and protection are required. The Trainnet® CPF modules have all the features of the Trainnet® CPS.

Published on: 2020-05-18

EKE-Electronics Ltd
Piispanmäentie 5
02240 Espoo
Tel +358 9 6130 30