Overview
The EX1200-3001 high-density multiplexer module is designed for scanning of multiple points to a common bus, in either 1-, 2-, or 4-wire configurations, either synchronously with the EX1200 system DMM scan function, or asynchronously as a system switch to other devices through LXI LAN messages or the hardware trigger bus. Up to 384 two-wire (or 192 four-wire) channels can be accommodated in a 1U EX1200 mainframe for maximum density, or mixed and matched with other EX1200 plug-ins for flexibility. Applications include cable harness testing, semiconductor and PCB testing, and applications where multiple points need to be switched to a common resource. All relays also have individual relay control, and each path allows for 2 A switching.
The EX1200-3001 consists of eight individual (1 x 8) 2-wire multiplexers, or eight (1 x 16) 1-wire multiplexers that can be interconnected under program control (via the bussing relays) to configure larger multiplexers as required. This eliminates external wiring and helps reduce unterminated stubs. The card has internal relays that can be closed to connect directly to the EX1200 analog bus. This feature allows the card and the internal EX1200 DMM to be tightly coupled, dramatically reducing test execution times. Access to the DMM also allows 4-wire measurements to be made, providing more accurate resistance measurements that compensate for lead-length.
The EX1200-3001 can be controlled programmatically using IVI-Switch compliant calls. Both path level programming and individual relay control are available. This information can be used for individual relay control through the driver. An optional terminal block provides screw termination points for external field wiring. This terminal block also includes cold junction compensation reference for more precise temperature measurements.
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