Application 3: Safety Mode Sil3/Cat.4/Ple - Siemens SIMATIC ET 200SP Manual

Applications of the F-I/O module

5.4 Application 3: Safety mode SIL3/Cat.4/PLe

Fault detection
The following table presents fault detection according to the sensor supply and the
parameter assignment for the short circuit test:
Table 5- 5
Fault
Short circuit within the channel
pair
Short circuit with other channels
or other sensor supplies
Short circuit with L+ to DI
Short circuit with M to DI
Discrepancy error
Short circuit with L+ to VS
Short circuit with M to VS
defective
*) Fault detection only if signals are corrupted. That is, the read signal differs from the sensor signal
5.4 Application 3: Safety mode SIL3/Cat.4/PLe
Assigning inputs to each other
The digital input module F-DI 8×24VDC HF has 8 fail-safe inputs, DI
combine two of these inputs each to one input.
You can combine the following inputs:
● DI
● DI
● DI
● DI
The process signals are provided by channels DI
Wiring
The wiring is carried out on the matching BaseUnit (Page 13).
36
Fault detection
n
n
n
or
n
(discrepancy error). If there is no signal corruption with respect to the sensor signal, fault detection
is not possible and is not required from a safety standpoint.
with DI
0 4
with DI
1 5
with DI
2 6
with DI
3 7
Fault detection
Internal sensor supply and
short circuit test deactivated
no
yes*
yes*
yes*
yes
no
yes
, DI , DI
0 1 2
Digital input module F-DI 8x24VDC HF (6ES7136-6BA00-0CA0)
External sensor supply
no
yes
yes*
yes*
yes
no
—
to DI (SIL3). You can
0 7
and DI .
3
Manual, 07/2013, A5E03858068-01