The IO821 I/O module (with an optional GNSS (GPS/GLONASS) receiver) provides precision timing and synchronization for real-time applications, and includes both IRIG and 1PPS input and output interfaces. The precision timing reference uses a 5 ns-resolution onboard oscillator that is phase-locked to an external timing reference input. Simulink driver blocks are also provided.
This I/O module supports multiple timing inputs and, when the current timing input is lost, it switches automatically to the next lower-priority input. Furthermore, the crystal oscillator provides uninterrupted precision timing even when all external sources become unavailable (referred to as holdover). For applications where accuracy during holdover is essential, an oven-controlled crystal oscillator (OCXO) is optionally available.
The IO821 I/O module is fully compatible with the Simulink Real-Time™ workflow. It can be used to generate an interrupt which triggers the Simulink model execution at very precise intervals. In addition, it can supply precision timing references to synchronize external hardware.
Key Features
- 1PPS input and output interfaces
- Inputs and outputs for both IRIG AM and IRIG DCLS
- Crystal oscillator capable of 5 ns resolution
- Optional GNSS receiver supporting GPS, QZSS, GLONASS and BeiDou