SIRIUS
®
TECHNICAL REFERENCE MANUAL
5. SIRIUS® measurement modules
5.1. Data transfer overview
Dewesoft offers SIRIUS® slices that can use different data-transfer technologies:
● USB
● high data-throughput allows for high sampling rates (up to 1 MS/s)
● extra connectors for power and synchronisation required
● direct connection to USB ports on the PC
● Standard EtherCAT®
● only one single cable needed for data, synchronisation and power
● Data-throughput allows for sampling rates up to 20 kS/s
● direct connection to standard Ethernet port on the PC possible
● DS-EtherCAT+
● this is a Dewesoft enhancement to the EtherCAT® standard, so that we can combine the
advantages of Standard Ethernet and USB data-transfer
5.1.1. USB data transfer
USB is a high speed data bus being able to transmit full speed data for all channels to the measurement
PC. The SIRIUS® USB slices allow sampling rates of up to 1 MHz (high-speed) and can be directly
connected to native USB ports on the measurement PC (or SBOX). In comparison to the EtherCAT®
version, the SIRIUS®-USB slices need extra connectors for power supply and synchronisation.
5.1.2. EtherCAT® data transfer
EtherCAT® - Ethernet for Control Automation Technology - is a 100 Mbit/s Ethernet-based fieldbus
system. The protocol is standardized in IEC 61158 and is suitable for both hard and soft real-time
requirements. EtherCAT® can be used for applications that require short data update times with low
communication jitter (for precise synchronisation purposes).
Important
When connecting EtherCAT® devices to the computer please make sure that you connect the
EtherCAT® cable directly to the Ethernet card of your PC without the use of network switches
or hubs.
SIRIUS
®
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