DATA ACQUISITION  -  PXI Based Instruments

PXI-7921
24-CH-2-Wire Multiplexer Module

ADLINK PXI-7921 is a relay multiplexer which consists of 24 2-wire relays (DPDT, 2 Form C). As a multiplexer, the PXI-7921 provides 48x1 1-wire, 24x1 2-wire and 12x1 4-wire configurations. Users could choose one of the configurations by software. PXI-7921 typically connects one instrument, such as a DMM, a digitizer or a signal source, with many points which need measurement or excitation. The contact position of the relays can be changed either by direct software commands or by following the instructions previously stored in the on-board scan list. The scan list advances upon the trigger from external measurement devices, such as a DMM. The scan list could also advance when the scan-delay timer expires. In the PXI-7921, PXI trigger functions are supported and software programmable. Multiple modules can therefore be synchronized without additional field wiring.

Features:

• PXI specifications Rev. 2.1 compliant
• 24-CH DPDT (2 Form C) non-latching relays
• Switching capacity: Max. count - 2A; Max. voltage - 220 VDC, 125 VAC
• On-board 1 k-sample scan list for deterministic scanning
• Handshaking signals for external instruments synchronization
• Safety functions: Hardware emergency shutdown and watchdog timer from 1 ms to 420s
• Multiple modules synchronization through PXI trigger bus and star trigger

Ordering Information

Associated Software

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