S21N1 is a batch controller with a polycarbonate front panel 72x144 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.

Max consumption - 10 VA
Data storage - EEPROM, storage
Interfaces - Nr. 1 RS232 (printer command)
Nr. 1 RS485 / ModBUS (data monitoring and control)
Nr. 1 MicroUSB (firmware update)
Displays - Nr. 2 LED numerical displays with five digits
Status Indicators - Start, stop, reset
Clock function - Clock with autonomous batteries, memory data storage and automatic management of the transition from summer time to winter time and vice versa
Input channels - Nr. 1 (isolated)
Input type - From sensor: reed, npn (2/3 fili), Namur, effetto Hall, fotoelettrico
Frequency - 1.000 Hz, minimum pulse lenght 0,1 ms
Control channels - Nr. 3 inputs (start, stop, reset)
Output channels - Nr. 2
Output type - Relays SPDT, 5 A, 250 V (resistive load)
Operating temperature - 0..50°C
Connections - Removable terminals on the backside
Dimensions (LxHxP) - 144x72x130 mm
Weight - 800 g
Programming / Dose - Frontal buttons
Certifications - CE

Parameter Name	Parameter Value
Options	panel-mounted