Siemens SIMATIC S7 Functional Safety Manual

Technical specifications
A.3 Fail-Safe signal module (SM) technical specifications
S7-1200 Functional Safety Manual
174 Manual, 02/2015, A5E03470344-AA
Table A- 50 Digital inputs
Model
SM 1226 F-DI 16 x 24 VDC
Number of inputs:
• 1oo1 evaluation
• 1oo2 evaluation
16 maximum
8 maximum
Note: You can individually assign each pair of inputs "a.x"
and "b.x" as a single 1oo2 channel or as 2 separate 1oo1
channels.
Type
Sink (IEC 61131-2 Type 1)
Rated voltage
24 VDC at 5 mA, nominal
Surge voltage
35 VDC for 0.5 s
Logic 1 signal
15 VDC at 3 mA to 30 VDC at 6 mA
Logic 0 signal
-30 VDC to 5 VDC
Connection of 2-wire proximity switch (BERO):
• Permissible quiescent current
Not possible
0.5 mA maximum
Filter times
• 0.8 ms
• 1.6 ms
• 3.2 ms
• 6.4 ms
• 12.8 ms
Note: Refer to "Fail-Safe signal module (SM) response times"
(Page 197) for further information.
Number of inputs on simultaneously
16 inputs at 55 °C horizontal or 45 °C vertical
Cable length (meters)
1
• 200 m unshielded with input filter time of 1.6 ms to 12.6
ms
• 200 m shielded with input filter time of 0.8 ms to 12.6 s
1
1
With an input delay of 0.8 ms, shielded cables must be used for the digital inputs and the sensor supply.

Siemens SIMATIC S7 Specifications

General

Brand	Siemens
Model	SIMATIC S7
Category	Controller
Language	English