SIMATIC S7-1200 – SM 1221 – Digital Input Signal Modules – Siemens

$ 135.52 – $ 204.82

SKU: N/A

The SM 1221 digital input signal modules convert the level of the external digital signals from the process into the internal signal level of the S7-1200 controller.

Product Specifications :

Article number 6ES7221-1BF32-0XB0 6ES7221-1BH32-0XB0
Digital Input SM 1221, 8DI, 24V DC Digital Input SM 1221, 16DI, 24V DC
General information
Product type designation SM 1221, DI 8×24 V DC SM 1221, DI 16×24 V DC
Supply voltage
Rated value (DC) 24 V 24 V
permissible range, lower limit (DC) 20.4 V 20.4 V
permissible range, upper limit (DC) 28.8 V 28.8 V
Input current
from backplane bus 5 V DC, max. 105 mA 130 mA
Digital inputs
● from load voltage L+ (without load), max. 4 mA; per channel 4 mA; per channel
output voltage / header
supply voltage of the transmitters / header
● product function / supply voltage for transmitters Yes Yes
Power loss
Power loss, typ. 1.5 W 2.5 W
Digital inputs
Number of digital inputs 8 16
● in groups of 2 4
Input characteristic curve in accordance with IEC 61131, type 1 Yes Yes
Number of simultaneously controllable inputs
all mounting positions
— up to 40 °C, max. 8 16
horizontal installation
— up to 40 °C, max. 8 16
— up to 50 °C, max. 8 16
vertical installation
— up to 40 °C, max. 8 16
Input voltage
● Rated value (DC) 24 V 24 V
● for signal “0” 5 V DC at 1 mA 5 V DC at 1 mA
● for signal “1” 15 V DC at 2.5 mA 15 V DC at 2.5 mA
Input current
● for signal “0”, max. (permissible quiescent current) 1 mA 1 mA
● for signal “1”, min. 2.5 mA 2.5 mA
● for signal “1”, typ. 4 mA 4 mA
Input delay (for rated value of input voltage)
for standard inputs
— parameterizable Yes; 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four Yes; 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four
for interrupt inputs
— parameterizable Yes Yes
Cable length
● shielded, max. 500 m 500 m
● unshielded, max. 300 m 300 m
Interrupts/diagnostics/status information
Alarms
● Diagnostic alarm Yes Yes
Diagnostics indication LED
● for status of the inputs Yes Yes
Potential separation
Potential separation digital inputs
● between the channels, in groups of 2 4
Degree and class of protection
IP degree of protection IP20 IP20
Standards, approvals, certificates
CE mark Yes Yes
CSA approval Yes Yes
UL approval Yes Yes
cULus Yes Yes
FM approval Yes Yes
RCM (formerly C-TICK) Yes Yes
KC approval Yes Yes
Marine approval Yes Yes
Ambient conditions
Free fall
● Fall height, max. 0.3 m; five times, in product package 0.3 m; five times, in product package
Ambient temperature during operation
● min. -20 °C -20 °C
● max. 60 °C 60 °C
● horizontal installation, min. -20 °C
● horizontal installation, max. 60 °C
● vertical installation, min. -20 °C
● vertical installation, max. 50 °C
● permissible temperature change 5°C to 55°C, 3°C / minute 5°C to 55°C, 3°C / minute
Ambient temperature during storage/transportation
● min. -40 °C -40 °C
● max. 70 °C 70 °C
Air pressure acc. to IEC 60068-2-13
● Storage/transport, min. 660 hPa 660 hPa
● Storage/transport, max. 1 080 hPa 1 080 hPa
Relative humidity
● Operation at 25 ℃ without condensation, max. 95 % 95 %
connection method / header
required front connector Yes Yes
Mechanics/material
Enclosure material (front)
● Plastic Yes Yes
Dimensions
Width 45 mm 45 mm
Height 100 mm 100 mm
Depth 75 mm 75 mm
Weights
Weight, approx. 170 g 210 g
Weight N/A
Dimensions N/A

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