User Data Space; Specifications - Siemens SIMATIC S7 Functional Safety Manual

Technical specifications
A.3 Fail-Safe signal module (SM) technical specifications
A.3.2.2

User data space

The SM 1226 F-DI 16 x 24 VDC user data space is 2 bytes (16 bits) of process value input
followed by 2 bytes of quality bits.
This is the bit structure for an F-DI configured with input start address 8:
A.3.2.3

Specifications

Table A- 46 General specifications
Model
Article number
Dimensions W x H x D (mm)
Weight
Power dissipation
Current consumption (SM Bus, 5 VDC)
Current consumption (24 VDC)
Isolation
Assigned address area:
I/O area for inputs
•
I/O area for outputs
•
Maximum achievable safety class:
In accordance with IEC 61508:2010
•
In accordance with EN ISO 13849-1:2008
•
Fail-safe performance characteristics:
Operation in Low Demand Mode (Average probability
•
of a dangerous failure on demand), PFD_avg
Operation in High Demand or Continuous Mode (Aver-
•
age frequency of a dangerous failure per hour), PFH
Proof test interval (Mission time or Useful lifetime)
•
Safety repair time
•
Inputs status display
Inputs fault display
172
Input terminal
DI a.0
DI a.7
DI b.0
DI b.7
Process value
I8.0
I8.7
I9.0
I9.7
SM 1226 F-DI 16 x 24 VDC
6ES7 226-6BA32-0XB0
70 x 100 x 75
250 grams
7 W
155 mA
130 mA + 6 mA / input used + any Vs1/Vs2 current used
Signal terminals on this module are referenced to this
•
module's M terminal and NOT ISOLATED from each oth-
er.
Signal terminals on this module are isolated to 500VAC
•
for 1 min from S7-1200 system internal logic and Ground.
9 bytes
5 bytes
1-channel
SIL 2
Category 3, PL d
SIL 2
5e-4
1e-8
20 years
100 hours
Green LED / channel
Red LED / channel
Quality bit
I10.0
I10.7
I11.0
I11.7
2-channel
SIL 3
Category 4, PL e
SIL 3
1e-5
1e-10
20 years
100 hours
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA