Weight, approx.210 g
Power loss, typ.2.5 W
Rated value (DC)24 V
— up to 40 °C, max.16
— up to 50 °C, max.16
— parameterizableYes
IP degree of protectionIP20
Number of digital inputs16
Product type designationSM 1221, DI 16x24 V DC
required front connectorYes
from backplane bus 5 V DC, max.130 mA
permissible range, lower limit (DC)20.4 V
permissible range, upper limit (DC)28.8 V
— global warming potential, (total) [CO2 eq]123 kg
— global warming potential, (during operation) [CO2 eq]111 kg
— global warming potential, (during production) [CO2 eq]12.1 kg
— Against chemically active substances acc. to EN 60654-4Yes; Class 3 (excluding trichlorethylene)
— global warming potential, (after end of life cycle) [CO2 eq]-0.434 kg
— to chemically active substances according to EN 60721-3-3Yes; Class 3C4 (RH < 75 %) incl. salt spray acc. to EN 60068-2-52 (severity degree 3); *
— to chemically active substances according to EN 60721-3-6Yes; Class 6C3 (RH < 75 %) incl. salt spray acc. to EN 60068-2-52 (severity degree 3); *
— to biologically active substances according to EN 60721-3-3Yes; Class 3B2 mold, fungus and dry rot spores (with the exception of fauna); Class 3B3 on request
— to biologically active substances according to EN 60721-3-6Yes; Class 6B2 mold and fungal spores (excluding fauna); Class 6B3 on request
— to mechanically active substances according to EN 60721-3-3Yes; Class 3S4 incl. sand, dust, *
— to mechanically active substances according to EN 60721-3-6Yes; Class 6S3 incl. sand, dust; *
— Resistant to commercially available coolants and lubricantsYes
Input characteristic curve in accordance with IEC 61131, type 1Yes
— Environmental conditions for process, measuring and control systems acc. to ANSI/ISA-71.04Yes; Level GX group A/B (excluding trichlorethylene; harmful gas concentrations up to the limits of EN 60721-3-3 class 3C4 permissible); level LC3 (salt spray) and level LB3 (oil)
— Note regarding classification of environmental conditions acc. to EN 60721, EN 60654-4 and ANSI/ISA-71.04* The supplied plug covers must remain in place over the unused interfaces during operation!
