... Communication protocol Modbus RTU&ASCII Expansion yes RTC yes LCD display with keypad Optional Alarming mode SMS,Ring ,email, ... on/ off-delays, pulse relay ,counters ,Watchdog function ,PI controller etc..Ø Logic functions-AND, OR, NOT, XOR……Ø Standard configure ... memory capabilityØ 4-lines, 16-character per line, backlight display& keypad optionalØ Standard Modbus RTU/ASCII/TCP communication protocol ...