PRODUCTS & TECHNOLOGY
Remote Isolated Field Input Card or PC-Based Control
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A 48-point remote isolated field input card designed for fast real-time PC-based control systems. The 7I70 from Mesa Electronics communicates with the host with a robust isolated RS-422 link. Standard CAT5 cables are used for wiring convenience. The 7I70 is supported by Mesa’s low cost FPGA cards, which present a simple parallel register interface to the host, with all protocol details handled by the smart interface. One FPGA card can support up to 32 external devices and up to 3,072 control points while still maintaining a 10 kHz service rate for all points.
The 7I70 has 48 DC voltage sensing inputs. The 7I70 inputs are smart with variable threshold sensing. Default input threshold is 50 percent of field power voltage with 20 percent hysteresis, but input thresholds are individually programmable from 0 VDC to 36 VDC. All inputs have LED status indicators and removable screw terminal field wiring. The 7I70 is suited for high performance industrial automation and machine tool applications. Price of the 7I70 in quantity100 is $57.