Siemens SIMATIC S7 Functional Safety Manual

Technical specifications
A.3 Fail-Safe signal module (SM) technical specifications
S7-1200 Functional Safety Manual
172 Manual, 02/2015, A5E03470344-AA
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:
Input terminal
Process value
Quality bit
DI a.0
I8.0
I10.0
DI a.7
I8.7
I10.7
DI b.0
I9.0
I11.0
DI b.7 I9.7 I11.7
A.3.2.3
Specifications
Table A- 46 General specifications
Model
SM 1226 F-DI 16 x 24 VDC
Article number
6ES7 226-6BA32-0XB0
Dimensions W x H x D (mm)
70 x 100 x 75
Weight
250 grams
Power dissipation
7 W
Current consumption (SM Bus, 5 VDC)
155 mA
Current consumption (24 VDC)
130 mA + 6 mA / input used + any Vs1/Vs2 current used
Isolation
• 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.
Assigned address area:
• I/O area for inputs
• I/O area for outputs
9 bytes
5 bytes
Maximum achievable safety class:
• In accordance with IEC 61508:2010
• In accordance with EN ISO 13849-1:2008
1-channel
SIL 2
Category 3, PL d
2-channel
SIL 3
Category 4, PL e
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
SIL 2
5e-4
1e-8
20 years
100 hours
SIL 3
1e-5
1e-10
20 years
100 hours
Inputs status display
Green LED / channel
Inputs fault display
Red LED / channel

Siemens SIMATIC S7 Specifications

General

Brand	Siemens
Model	SIMATIC S7
Category	Controller
Language	English