The full 3 way (input, output, power) isolation makes this module useful for ground loop elimination, common mode signal rejection or noise pickup reduction. The adjustable excitation power supply generates a stable source of voltage to drive from one to four 350 Ω (or greater) devices. Sense lead circuitry is included to cancel the effects of lead wire resistance, if required. Input, output, excitation and zero offset are field configurable, via external rotary and slide switches. Offsets up to ±100% of span can be used to cancel sensor offsets or non-zero dead weights (taring). Non-interactive zero and span simplifies calibration.
The APD4059 can be specified with varying degrees of filtering to tailor the response time to the application. For maximum versatility, the APD4059STRD milliamp output can be selectively wired for sinking or sourcing. This allows connection to any type of mA input receiving device. Consult factory for assistance.
