ABB NASM03 Digital I/O module

ABB NASM03 Digital I/O module

THE NASM03 Control and Status Register (CSR) Bits 11 and 13 Control the connection of the synchro outputs VIA RELAYS K2 AND K3 to the synchro backplane (see Figure 1-10 on page 28); therefore, only one of these relays can be energized at one time. The programmer must provide a one millisecond (minimum) delay for relays to drop out before another relay can be energized. Relays on other boards must also be de-energized before they are tested. Simultaneous connection of more than one synchro signal to the test backplane can result in stuck relays and/or blown fuses.

NASM03 Quad SDC/RDC interface is utilized for fault detection and isolation of DSC/DRC Boards and is based on an industry standard quad-multiplexing SDC/RDC module. This high performance, fast settling, 14-bit SDC/RDC Board is required to support the real-time fault detection and isolation capabilities of the IIOC and the real-time synchro/resolver input data processing required in the simulation and training industry. The relay operation described in the following section provides the user with the information necessary to implement built-in-test functions.

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