PLC SIEMENS S7-300 (SM-322)

Load voltage L+
● Rated value (DC) : 24 V
● permissible range, lower limit (DC) : 20.4 V
● permissible range, upper limit (DC) : 28.8 V

Input current
from load voltage L+ (without load), max. : 160 mA
from backplane bus 5 V DC, max. : 110 mA

Power loss
Power loss, typ. : 6.6 W

Digital outputs
Number of digital outputs : 32
Short-circuit protection : Yes; Electronic
● Response threshold, typ. : 1 A
Limitation of inductive shutdown voltage to : L+ (-53 V)
Controlling a digital input : Yes

Switching capacity of the outputs
● on lamp load, max. : 5 W

Load resistance range
● lower limit : 48 Ω
● upper limit : 4 kΩ

Output voltage
● for signal "1", min. : L+ (-0.8 V)

Output current
● for signal "1" rated value : 0.5 A
● for signal "1" permissible range for 0 to 40 °C, min. : 5 mA
● for signal "1" permissible range for 0 to 40 °C, max. : 0.6 A
● for signal "1" permissible range for 40 to 60 °C, min. : 5 mA
● for signal "1" permissible range for 40 to 60 °C, max. : 0.6 A
● for signal "1" minimum load current : 5 mA
● for signal "0" residual current, max. : 0.5 mA

Output delay with resistive load
● "0" to "1", max. : 100 µs
● "1" to "0", max. : 500 µs

Parallel switching of two outputs
● for uprating : No
● for redundant control of a load : Yes; only outputs of the same group

Switching frequency
● with resistive load, max. : 100 Hz
● with inductive load, max. : 0.5 Hz
● with inductive load (acc. to IEC 60947-5-1, DC13), max. : 0.5 Hz
● on lamp load, max. : 10 Hz

Total current of the outputs (per group)
horizontal installation
— up to 40 °C, max. : 4 A
— up to 60 °C, max. : 3 A

vertical installation
— up to 40 °C, max. : 2 A

Cable length
● shielded, max. : 1 000 m
● unshielded, max. : 600 m

Interrupts/diagnostics/status information
Alarms : No
Diagnostics function : No

Alarms
● Diagnostic alarm : No

Diagnoses
● Diagnostic information readable : No
● Wire-break : No
● Short-circuit : No
● missing load voltage : No

Diagnostics indication LED
● Rated load voltage PWR (green) : No
● Fuse OK FSG (green) : No
● Group error SF (red) : No
● Status indicator digital output (green) : Yes; per channel
● Channel fault indicator F (red) : No

Potential separation
Potential separation digital outputs
● between the channels : Yes
● between the channels, in groups of : 8
● between the channels and backplane bus : Yes; Optocoupler

Isolation
Isolation tested with : 500 V DC

connection method
required front connector : 40-pin

Dimensions
Width : 40 mm
Height : 125 mm
Depth : 120 mm

Weights
Weight, approx. : 260 g