Batch controller with CPU, double display, clock based and RS485 serial port.
S21N1 is a batch controller with a polycarbonate front panel 72×144 mm including 2 numerical displays 5 digit red LED high brightness, 7 LED that designate operating status, 6 keys for device’s programming and batching cycle command. The device has 3 control digital input (start, stop, reset) and 1 pulse sensor input as free contact, reed contact, NPN/PNP open collector BJT, NAMUR sensor, Hall effect sensor or photoelectric sensor (max frequency 2,2 kHz). Two are SPDT relay digital outputs (5 A, 250 V, resistive load). S21N1 is available in standard, Ex, IP65 versions. Unlike the S20 model, S21N1 is also equipped with clock and flash memory and it can manage the transition from summer time to winter time and vice-versa.