$ 141.68 – $ 214.13
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.
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 |
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Dimensions | N/A |
INOSAKI Limited
RM B 5/F Gaylord Comm,
Bldg 114-118 Lockhart Rd.
Hong Kong
INOSAKI Sdn. Bhd.
2-1-9, Ground Floor, One Square, Tingkat Mahsuri 1,
11900 Bayan Lepas, Penan
INOSAKI Pte. Ltd.
101 Upper Cross Street,
No. 06-17, People’s Park Centre,
Singapore (058357)