General information
based on	6ES7421-1BL01-0AA0
Input current
from backplane bus 5 V DC, max.	20 mA
Power loss
Power loss, typ.	6 W
Digital inputs
Number of digital inputs	32
Number of simultaneously controllable inputs
● Number of simultaneously controllable inputs	32
Input voltage
● Type of input voltage	DC
● Rated value (DC)	24 V
● for signal “0”	-30 V DC to +5 V DC
● for signal “1”	13 V DC to 30 V DC
Input current
● for signal “0”, max. (permissible quiescent current)	1.3 mA
● for signal “1”, typ.	7 mA
Input delay (for rated value of input voltage)
for standard inputs
– at “0” to “1”, min.	1.2 ms
– at “0” to “1”, max.	4.8 ms
– at “1” to “0”, min.	1.2 ms
– at “1” to “0”, max.	4.8 ms
Cable length
● shielded, max.	1 000 m
● unshielded, max.	600 m
Encoder
Connectable encoders
● 2-wire sensor	Yes
– permissible quiescent current (2-wire sensor), max.	1.5 mA
Interrupts/diagnostics/status information
Diagnostics function	No
Diagnostics indication LED
● Status indicator digital input (green)	Yes
Potential separation
Potential separation digital inputs
● between the channels	No
● between the channels, in groups of	32
● between the channels and backplane bus	Yes
Isolation
Isolation tested with	500 V DC
Ambient conditions
Ambient temperature during operation
● min.	-25 °C; = Tmin
● max.	60 °C; = Tmax
Ambient temperature during storage/transportation
● min.	-40 °C
● max.	70 °C
Altitude during operation relating to sea level
● Installation altitude above sea level, max.	5 000 m
● Ambient air temperature-barometric pressure-altitude	Tmin … Tmax at 1 140 hPa … 795 hPa (-1 000 m … +2 000 m) // Tmin … (Tmax – 10 K) at 795 hPa … 658 hPa (+2 000 m … +3 500 m) // Tmin … (Tmax -20 K) at 658 hPa … 540 hPa (+3 500 m … +5 000 m)
Relative humidity
● With condensation, tested in accordance with IEC 60068- 2-38, max.	100 %; RH incl. condensation / frost (no commissioning in bedewed state), horizontal installation
Resistance
Use in stationary industrial systems
– to biologically active substances according to EN 60721-3-3	Yes; Class 3B2 mold, fungus and dry rot spores (with the exception of fauna); Class 3B3 on request
– to chemically active substances according to EN 60721-3-3	Yes; Class 3C4 (RH < 75 %) incl. salt spray acc. to EN 60068-2-52 (severity degree 3); *
– to mechanically active substances according to EN 60721-3-3	Yes; Class 3S4 incl. sand, dust, *
Use on ships/at sea
– to biologically active substances according to EN 60721-3-6	Yes; Class 6B2 mold and fungal spores (excluding fauna); Class 6B3 on request
– to chemically active substances according to EN 60721-3-6	Yes; Class 6C3 (RH < 75 %) incl. salt spray acc. to EN 60068-2-52 (severity degree 3); *
– to mechanically active substances according to EN 60721-3-6	Yes; Class 6S3 incl. sand, dust; *
Usage in industrial process technology
– Against chemically active substances acc. to EN 60654-4	Yes; Class 3 (excluding trichlorethylene)
– Environmental conditions for process, measuring and control systems acc. to ANSI/ISA-71.04	Yes; 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)
Remark
– 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!
Conformal coating
● Coatings for printed circuit board assemblies acc. to EN 61086	Yes; Class 2 for high reliability
● Protection against fouling acc. to EN 60664-3	Yes; Type 1 protection
● Military testing according to MIL-I-46058C, Amendment 7	Yes; Discoloration of coating possible during service life
● Qualification and Performance of Electrical Insulating Compound for Printed Board Assemblies according to IPC- CC-830A	Yes; Conformal coating, Class A
Dimensions
Width	25 mm
Height	290 mm
Depth	210 mm
Weights
Weight, approx.	500 g