Article number	6ES7323-1BH01-0AA0	6ES7323-1BL00-0AA0
	SM323, 8DI/8DO, DC24V, 0,5A	SM323, 16DI/DO, DC24V, 0,5A
Supply voltage
Load voltage L+
● 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 load voltage L+ (without load), max.	40 mA	80 mA
from backplane bus 5 V DC, max.	40 mA	80 mA
Power loss
Power loss, typ.	3.5 W	6.5 W
Digital inputs
Number of digital inputs	8	16
Input characteristic curve in accordance with IEC 61131, type 1	Yes	Yes
Number of simultaneously controllable inputs
horizontal installation
— up to 40 °C, max.		16
— up to 60 °C, max.	8	8
vertical installation
— up to 40 °C, max.	8	16
Input voltage
● Type of input voltage	DC	DC
● Rated value (DC)	24 V	24 V
● for signal “0”	-30 to +5 V	-30 to +5 V
● for signal “1”	13 to 30V	13 to 30V
Input current
● for signal “1”, typ.	7 mA	7 mA
Input delay (for rated value of input voltage)
for standard inputs
— at “0” to “1”, min.	1.2 ms	1.2 ms
— at “0” to “1”, max.	4.8 ms	4.8 ms
— at “1” to “0”, min.	1.2 ms	1.2 ms
— at “1” to “0”, max.	4.8 ms	4.8 ms
Cable length
● shielded, max.	1 000 m	1 000 m
● unshielded, max.	600 m	600 m
Digital outputs
Number of digital outputs	8	16
Short-circuit protection	Yes	Yes
● Response threshold, typ.	1 A	1 A
Limitation of inductive shutdown voltage to	L+ (-53 V)	L+ (-48 V)
Controlling a digital input	Yes	Yes
Switching capacity of the outputs
● on lamp load, max.	5 W	5 W
Load resistance range
● lower limit	48 Ω	48 Ω
● upper limit	4 kΩ	4 kΩ
Output voltage
● for signal “1”, min.	L+ (-0.8 V)	L+ (-0.8 V)
Output current
● for signal “1” rated value	0.5 A	0.5 A
● for signal “1” permissible range, min.	5 mA	5 mA
● for signal “1” permissible range, max.	0.6 A	0.6 A
● for signal “1” minimum load current	5 mA	5 mA
● for signal “0” residual current, max.	0.5 mA	0.5 mA
Output delay with resistive load
● “0” to “1”, max.	100 µs	100 µs
● “1” to “0”, max.	500 µs	500 µs
Parallel switching of two outputs
● for uprating	No	No
● for redundant control of a load	Yes; only outputs of the same group	Yes; only outputs of the same group
Switching frequency
● with resistive load, max.	100 Hz	100 Hz
● with inductive load, max.	0.5 Hz	0.5 Hz
● with inductive load (acc. to IEC 60947-5-1, DC13), max.	0.5 Hz
● on lamp load, max.	10 Hz	100 Hz
Total current of the outputs (per group)
horizontal installation
— up to 40 °C, max.	4 A	4 A
— up to 60 °C, max.	4 A	3 A
vertical installation
— up to 40 °C, max.	4 A	2 A
Cable length
● shielded, max.	1 000 m	1 000 m
● unshielded, max.	600 m	600 m
Encoder
Connectable encoders
● 2-wire sensor	Yes	Yes
— permissible quiescent current (2-wire sensor), max.	2 mA	1.5 mA
Interrupts/diagnostics/status information
Alarms	No	No
Diagnostics function	No	No
Diagnostics indication LED
● Status indicator digital input (green)	Yes	Yes
● Status indicator digital output (green)	Yes	Yes
Potential separation
Potential separation digital inputs
● between the channels	Yes	Yes
● between the channels, in groups of	8	16
● between the channels and backplane bus	Yes; Optocoupler	Yes; Optocoupler
Potential separation digital outputs
● between the channels	Yes	Yes
● between the channels, in groups of	8	8
● between the channels and backplane bus	Yes; Optocoupler	Yes; Optocoupler
Isolation
Isolation tested with	500 V DC	500 V DC
connection method / header
required front connector	20-pin	40-pin
Dimensions
Width	40 mm	40 mm
Height	125 mm	125 mm
Depth	120 mm	120 mm
Weights
Weight, approx.	220 g	260 g