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SIMATIC S7-1200, Digital output SM 1222, 8 DO, Relay Changeover contact
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General information
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Product type designation
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SM 1222, DQ 8x relay/2 A
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Supply voltage
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permissible range, lower limit (DC)
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20.4 V
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permissible range, upper limit (DC)
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28.8 V
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Input current
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from backplane bus 5 V DC, max.
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140 mA
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Digital outputs
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● from load voltage L+, max.
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16.7 mA/relay coil
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Power loss
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Power loss, typ.
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5 W
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Digital outputs
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Number of digital outputs
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8
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● in groups of
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1
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Short-circuit protection
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No; to be provided externally
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Switching capacity of the outputs
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● with resistive load, max.
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2 A
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● on lamp load, max.
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30 W with DC, 200 W with AC
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Output voltage
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● Rated value (DC)
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5 V DC to 30 V DC
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● Rated value (AC)
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5 V AC to 250 V AC
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Output current
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● for signal "1" rated value
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2 A
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Output delay with resistive load
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● "0" to "1", max.
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10 ms
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● "1" to "0", max.
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10 ms
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Total current of the outputs (per group)
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horizontal installation
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— up to 50 °C, max.
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2 A; Current per mass
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Relay outputs
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● Number of relay outputs
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8
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● Rated supply voltage of relay coil L+ (DC)
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24 V
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● Number of operating cycles, max.
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mechanically 10 million, at rated load voltage 100 000
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Switching capacity of contacts
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— with inductive load, max.
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2 A
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— on lamp load, max.
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30 W with DC, 200 W with AC
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— with resistive load, max.
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2 A
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Cable length
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● shielded, max.
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500 m
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● unshielded, max.
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150 m
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Interrupts/diagnostics/status information
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Alarms
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● Diagnostic alarm
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Yes
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Diagnostics indication LED
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● for status of the outputs
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Yes
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Potential separation
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Potential separation digital outputs
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● between the channels
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Relays
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● between the channels, in groups of
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1
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● between the channels and backplane bus
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1500 V AC for 1 minute
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Permissible potential difference
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between different circuits
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750 V AC for 1 minute
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Degree and class of protection
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Degree of protection acc. to EN 60529
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● IP20
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Yes
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Standards, approvals, certificates
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CE mark
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Yes
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CSA approval
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Yes
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UL approval
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Yes
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cULus
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Yes
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FM approval
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Yes
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RCM (formerly C-TICK)
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Yes
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Marine approval
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Yes
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Ambient conditions
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Free fall
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● Fall height, max.
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0.3 m; five times, in product package
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Ambient temperature during operation
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● min.
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-20 °C
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● max.
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60 °C; Number of simultaneously activated outputs: 4 (no adjacent points) at 60 °C horizontal or 50 °C vertical, 8 at 55 °C horizontal or 45 °C vertical
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● horizontal installation, min.
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-20 °C
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● horizontal installation, max.
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60 °C
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● vertical installation, min.
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-20 °C
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● vertical installation, max.
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50 °C
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● permissible temperature change
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5°C to 55°C, 3°C / minute
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Ambient temperature during storage/transportation
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● min.
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-40 °C
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● max.
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70 °C
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Air pressure acc. to IEC 60068-2-13
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● Storage/transport, min.
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660 hPa
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● Storage/transport, max.
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1 080 hPa
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Relative humidity
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● Operation at 25 ℃ without condensation, max.
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95 %
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Connection method
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required front connector
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Yes
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Mechanics/material
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Enclosure material (front)
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● Plastic
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Yes
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Dimensions
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Width
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70 mm
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Height
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100 mm
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Depth
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75 mm
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Weights
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Weight, approx.
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310 g
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