General information
Product type designation		SM 1223, DI 16x24 V DC, DQ 16x relay
Supply voltage
Rated value (DC)		24 V
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.		180 mA
Digital inputs
● from load voltage L+ (without load), max.		4 mA/input 11 mA/relay
output voltage / header
supply voltage of the transmitters / header
● present		Yes
Power loss
Power loss, typ.		10 W
Digital inputs
Number of digital inputs		16
● in groups of		2
Input characteristic curve in accordance with IEC 61131, type 1		Yes
Number of simultaneously controllable inputs
all mounting positions
— up to 40 °C, max.		16
horizontal installation
— up to 40 °C, max.		16
— up to 50 °C, max.		16
vertical installation
— up to 40 °C, max.		16
Input voltage
● Type of input voltage		DC
● Rated value (DC)		24 V
● for signal "0"		5 V DC at 1 mA
● for signal "1"		15 V DC at 2.5 mA
Input current
● for signal "0", max. (permissible quiescent current)		1 mA
● for signal "1", min.		2.5 mA
● for signal "1", typ.		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
for interrupt inputs
— parameterizable		Yes
Cable length
● shielded, max.		500 m
● unshielded, max.		300 m
Digital outputs
Number of digital outputs		16
● in groups of		4
Short-circuit protection		No; to be provided externally
Switching capacity of the outputs
● with resistive load, max.		2 A
● on lamp load, max.		30 W with DC, 200 W with AC
Output voltage
● Rated value (DC)		5 V DC to 30 V DC
● Rated value (AC)		5 V AC to 250 V AC
Output current
● for signal "1" rated value		2 A
● for signal "1" permissible range, max.		2 A
Output delay with resistive load
● "0" to "1", max.		10 ms
● "1" to "0", max.		10 ms
Total current of the outputs (per group)
horizontal installation
— up to 50 °C, max.		8 A; Current per mass
Relay outputs
● Number of relay outputs		16
● Rated supply voltage of relay coil L+ (DC)		24 V
● Number of operating cycles, max.		mechanically 10 million, at rated load voltage 100 000
Switching capacity of contacts
— with inductive load, max.		2 A
— on lamp load, max.		30 W with DC, 200 W with AC
— with resistive load, max.		2 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 inputs		Yes
● for status of the outputs		Yes
Potential separation
Potential separation digital inputs
● between the channels, in groups of		2
Potential separation digital outputs
● between the channels		Relays
● between the channels, in groups of		4
● between the channels and backplane bus		1 500 V AC for 1 minute
Permissible potential difference
between different circuits		750 V AC for 1 minute
Degree and class of protection
IP degree of protection		IP20
Standards, approvals, certificates
CE mark		Yes
CSA approval		Yes
UL approval		Yes
cULus		Yes
FM approval		Yes
RCM (formerly C-TICK)		Yes
KC approval		Yes
Marine approval		Yes
Ecological footprint
● environmental product declaration		Yes
Global warming potential
— global warming potential, (total) [CO2 eq]		123 kg
— global warming potential, (during production) [CO2 eq]		12.1 kg
— global warming potential, (during operation) [CO2 eq]		111 kg
— global warming potential, (after end of life cycle) [CO2 eq]		-0.434 kg
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; Number of simultaneously activated outputs: 8 (no adjacent points) at 60 °C horizontal or 50 °C vertical, 16 at 55 °C horizontal or 45 °C vertical
● 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		70 mm
Height		100 mm
Depth		75 mm
Weights
Weight, approx.		350 g