In driverless underground systems up to 500 mobile and stationary control and management systems are needed to monitor the train on a line; in this case the control and monitoring system provides a response channel that allows the permanent transmission of status data of the vehicles back to the control center.

The redundant CompactPCI® computer systems consist of standard Pentium® III based single-board computer in single Eurocard format. It features a low-voltage Celeron® with 650 MHz clock frequency, two Fast Ethernet and two serial ports. The serial interfaces and an additonal watchdog are implemented as IP cores in the on-board FPGA. The second card in the system comes with eight additional serial interfaces which are all realized in FPGA and which work in asynchronous RS422 mode and in synchronous HDLC mode.

Another card delivers the remaining I/Os required in the system, consisting of digital I/O channels, analog outputs, counter pulses, a radar sensor to pick up data from the route sensors and interrupt inputs. All these functions are again configured in the on-board FPGA. If required in a project, an MVB (Multifunction Vehicle Bus) fieldbus interface card can also be plugged on a mezzanine carrier board. The complete electronics are screened for an operation temperature of -40 to +85°C and conformally coated against humidity and dust.