The RM4-RTC is a DIN rail mount real time clock. When fitted with a RS485
serial retransmission it can be used as a master clock to synchronise other
displays. The programming is very flexible and achieved through the front
panel pushbuttons. The RM4-TMR is a timer with stopwatch and elapsed timer
functions. Remote inputs allow for start/stop/reset/etc functions. Both
instruments have 5 digit displays and 2 setpoint relays as standard.