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		SIMATIC S7-1200, Digital output SM 1222, 8 DO, 24 V DC, transistor 0.5 A
General information
Product type designation		SM 1222, DQ 8x24 V DC/0.5 A
Supply voltage
permissible range, lower limit (DC)		20.4 V
permissible range, upper limit (DC)		28.8 V
Input current
from backplane bus 5 V DC, max.		120 mA
Power loss
Power loss, typ.		1.5 W
Digital outputs
Number of digital outputs		8
● in groups of		1
Short-circuit protection		No; to be provided externally
Limitation of inductive shutdown voltage to		typ. (L+) -48 V
Switching capacity of the outputs
● with resistive load, max.		0.5 A
● on lamp load, max.		5 W
Output voltage
● Rated value (DC)		24 V
● for signal "0", max.		0.1 V; with 10 kOhm load
● for signal "1", min.		20 V DC
Output current
● for signal "1" rated value		0.5 A
● for signal "0" residual current, max.		10 μA
Output delay with resistive load
● "0" to "1", max.		50 μs
● "1" to "0", max.		200 μs
Total current of the outputs (per group)
horizontal installation
— up to 50 °C, max.		4 A; Current per mass
Relay outputs
Switching capacity of contacts
— with inductive load, max.		0.5 A
— on lamp load, max.		5 W
— with resistive load, max.		0.5 A
Cable length
● shielded, max.		500 m
● unshielded, max.		150 m
Interrupts/diagnostics/status information
Alarms
● Diagnostic alarm		Yes
Diagnostics indication LED
● for status of the outputs		Yes
Potential separation
Potential separation digital outputs
● between the channels, in groups of		1
● between the channels and backplane bus		500 V AC
Degree and class of protection
Degree of protection acc. to EN 60529
● IP20		Yes
Standards, approvals, certificates
CE mark		Yes
CSA approval		Yes
UL approval		Yes
cULus		Yes
FM approval		Yes
RCM (formerly C-TICK)		Yes
Marine approval		Yes
Ambient conditions
Free fall
● Fall height, max.		0.3 m; five times, in product package
Ambient temperature during operation
● min.		-20 °C
● max.		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
Ambient temperature during storage/transportation
● min.		-40 °C
● max.		70 °C
Air pressure acc. to IEC 60068-2-13
● Storage/transport, min.		660 hPa
● Storage/transport, max.		1 080 hPa
Relative humidity
● Operation at 25 ℃ without condensation, max.		95 %
Connection method
required front connector		Yes
Mechanics/material
Enclosure material (front)
● Plastic		Yes
Dimensions
Width		45 mm
Height		100 mm
Depth		75 mm
Weights
Weight, approx.		180 g
last modified:		10/31/2018

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6ES72221BF320XB0  6ES72221BF320XB0