General information
Product type designationSM 1226, F-DI 4x 24 V DC, F-DQ 2x 24 V DC, DI 2x 24 V DC
HW functional status01
Firmware versionV1.0.0
Supply voltage
Rated value (DC)24 V
permissible range, lower limit (DC)20.4 V
permissible range, upper limit (DC)28.8 V
Reverse polarity protectionYes
Input current
from backplane bus 5 V DC, max.80 mA
Digital inputs
from load voltage L+ (without load), max.42 mA; 1L+ plus 6 mA / input used plus any VS0 to VS3 current used
Digital outputs
from load voltage L+, max.45 mA; 2L+ plus load current for all P-switch outputs
Encoder supply
Number of outputs4; Vs0 - Vs3
24 V encoder supply
Short-circuit protectionYes; per channel, electronic
Output current, max.0.5 A; per sensor supply; 1.0 A total sensor supplies
Power loss
Power loss, typ.6 W
Digital inputs
Number of digital inputs6; 4 fail-safe inputs: 2 (1oo2), 4 (1oo1), or a mix; 2 standard inputs
in groups of6
Sourcing/sinking inputNo
Input characteristic curve in accordance with IEC 61131, type 1Yes; Current-sinking
Input voltage
Rated value (DC)24 V
for signal "0"-3 to +5V
for signal "1"+15 to +30 V
Input current
for signal "0", max. (permissible quiescent current)0.5 mA
for signal "1", min.2.5 mA
for signal "1", typ.4 mA; 6 mA maximum
for standard inputs
— parameterizableYes; Fail-safe: 0.8 / 1.6 / 3.2 / 6.4 / and 12.8 ms (selectable individually) Standard: 0.2 / 0.4 / 0.8 / 1.6 / 3.2 / 6.4 / and 12.8 ms (selectable together)
Cable length
shielded, max.500 m
unshielded, max.300 m
Digital outputs
Number of digital outputs2
in groups of2
Short-circuit protectionYes; per channel, electronic
Response threshold, typ.10 A
Open-circuit detectionYes; per channel, only detects when output is off with PM load that allows small negative current
Overload protectionYes; per channel
Response threshold, typ.4 A; measured at P-switch for more than 0.5 s
Limitation of inductive shutdown voltage toTyp. -74 V (typ. -26 V P-switch; typ. +48 V M-switch)
Controlling a digital inputYes; Only permitted in PP mode, not with PM mode
Switching capacity of the outputs
on lamp load, max.10 W
Output voltage
Rated value (DC)24 V
for signal "1", min.2L+ (-2.0 V); P-switch: 2L+ (-1.5 V); M-switch: 0.5 V
Output current
for signal "1" rated value2 A
for signal "1" permissible range, max.10 mA to 2 A; 4 A total for all outputs
for signal "0" residual current, max.0.5 mA; P-switch or M-switch
Parallel switching of two outputs
for upratingNo
for redundant control of a loadNo
Switching frequency
with resistive load, max.30 Hz
with inductive load, max.0.1 Hz
on lamp load, max.10 Hz
Cable length
shielded, max.500 m
unshielded, max.30 m for hardware version FS-01; 10 m for hardware revision FS-01 when used in burner applications related to EN 298
Interrupts/diagnostics/status information
Diagnostics functionYes; available for the module and failsafe I/O only; not supported for standard inputs
Diagnostics indication LED
DIAG LEDYes
for status of the inputsYes
for status of the outputsYes
Potential separation digital inputs
between the channelsNo
Number of potential groups1
between the channels and backplane busYes
Potential separation digital outputs
between the channelsNo
between the channels and backplane busYes
Isolation
Isolation tested with707 V DC (type test)
Degree and class of protection
IP degree of protectionIP20
Standards, approvals, certificates
Siemens Eco Profile (SEP)Siemens EcoTech
CE markYes
cULusYes
RCM (formerly C-TICK)Yes
KC approvalYes
Highest safety class achievable in safety mode
Performance level according to ISO 13849-1PLd (F-DI single-channel, F-DQ with Dark test disabled), PLe (F-DI two-channel, F-DQ including Dark test disabled for 48 hours)
Category according to ISO 13849-1Cat. 3 (F-DI single-channel, F-DQ with Dark test disabled), Cat. 4 (F-DI two-channel, F-DQ including Dark test disabled for 48 hours)
SIL acc. to IEC 61508SIL 2 (F-DI single-channel, F-DQ with Dark test disabled), SIL 3 (F-DI two-channel, F-DQ including Dark test disabled for 48 hours)
Probability of failure (for service life of 20 years and repair time of 100 hours)
— Low demand mode: PFDavg in accordance with SIL2< 2.00E-04 F-DI; < 2.00E-04 F-DQ
— Low demand mode: PFDavg in accordance with SIL3< 3.00E-05 F-DI; < 3.00E-05 F-DQ
— High demand/continuous mode: PFH in accordance with SIL2< 5.00E-09 1/h F-DI; < 6.00E-09 1/h F-DQ
— High demand/continuous mode: PFH in accordance with SIL3< 5.00E-10 1/h F-DI; < 5.00E-09 1/h F-DQ
Free fall
Fall height, max.0.3 m; five times, in product package
Ambient temperature during operation
horizontal installation, min.0 °C; No condensation
horizontal installation, max.60 °C; at max. specification
vertical installation, min.0 °C; No condensation
vertical installation, max.50 °C; at max. specification
Ambient temperature during storage/transportation
min.-40 °C
max.70 °C
Air pressure acc. to IEC 60068-2-13
Operation, min.540 hPa
Operation, max.1 140 hPa
Storage/transport, min.540 hPa
Storage/transport, max.1 140 hPa
Altitude during operation relating to sea level
Installation altitude, min.-1 000 m
Installation altitude, max.5 000 m
Ambient air temperature-barometric pressure-altitudeFor altitudes above 2 000 m, the maximum permissible ambient temperature must be derated: >2 000 m 0.9 factor, >3 000 m 0.8 factor, >4 000 m 0.7 factor. 5 000 m is max allowed altitude.
Relative humidity
Operation at 25 ℃ without condensation, max.95 %
Mechanics/material
PlasticYes
Dimensions
Width30 mm
Height125 mm
Depth100 mm
Weights
Weight, approx.180 g