Acromag”s BusWorks Model 989EN isolated discrete I/O units are inch-wide modules that provide an isolated Ethernet Modbus TCI/IP interface for any input/output mix of up to 16 discrete signals. Inputs sense the status of dry contacts, switches, power supplies, or DC logic. Industrial-grade units have eight 32-bit pulse counters with timers, alarms, and nonvolatile memory for metering, totalizing, and low-frequency periodic measurement functions. Outputs control solid-state switching of lamps, horns, and other devices. Common applications involve monitoring of temperature, pressure, flow, level, and discrete sensor switches in process control applications. Outputs are a good fit for switching valves, actuators, pumps, and motors, as well as for audible or visual alarms. Counter/timer functions are useful for proximity, RFID, or speed measurement and for totaling pulses in utility meter and predictive-maintenance cycle applications. CE, UL and ATEX approvals (Zone 2, Class I, Division 2, Group ABCD locations) are pending.