Serial Links Interface Unit
The EKE-Trainnet® Serial Links Interface Unit (SIU) is used to implement up to eight serial links.
The physical layer level and parts of data link layer are implemented within SIU and higher protocol layers are implemented on the system’s Central Processing Unit (CPU). For gateway applications, the routing between the Serial Link buses and other buses are implemented by the train computer CPU module.
Key Features
The module has one DIN41612- F48 connector on the front panel where Serial Links can be connected. Serial links are split into two identical groups which are isolated from the FPGA and from each other. In each group there are four Serial Links that can be configured in different ways according to the table below.
The EKE-Trainnet® SIU module provides 2 kByte long RX and TX double buffers for each serial link. The system CPU can access these buffers through the VME shared memory. A dedicated FPGA controls precise timing for all eight channels in parallel and provides convenient double buffering for the system CPU. This guarantee high performance in demanding safety critical applications.
Communication between the module and the train computer/system is done through shared memory over the IEC 821 VME back plane bus.
Options
The EKE-Trainnet® SIU comes in two different versions offering different Serial Interface combinations. Please consult the Technical Specification for Serial Links Interface Unit.
