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Description
The failsafe digital input is suitable for connecting the following devices:
• safety sensors, e.g. emergency stop control devices and light curtains.
• pre-processing devices, e.g. failsafe control systems and safety relays.
• Sourcing/sourcing or sourcing/sinking failsafe digital outputs
Conditions for quiescent current in the P and M channels:
– The quiescent current must be identical.
– The quiescent current must not be greater than 0.5 mA.
The converter expects signals with the same state at its failsafe digital input:
• 1 signal: The safety function is deselected.
• 0 signal: The safety function is selected.
Table 7-28
Category
Cat 3
Cat 4
Example
The following examples correspond to Performance Level (PL) e according to EN ISO 13849-1
and Safety Integrity Level (SIL) 3 according to IEC 61508 and IEC 62061.
The information relating to PL and SIL applies in respect of the converter. The external
connection of the converter is to be assessed on the customer side.
The maximum current of the supply voltages VS 1 and VS 2 must not be exceeded.
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
Achievable category according to EN ISO 13849‑1
Supply voltage
No use of the converter
supply voltage
Exclusive use of the sup‐
ply voltage from termi‐
nal X130:1 (VS 1)
Simultaneous use of
both supply voltages
from terminals X130:1
(VS 1) and X130:5 (VS 2)
No use of the converter
supply voltage, but with
test pulses of the con‐
nected external device
Application
Result
Local use, e.g.
The converter self-test detects errors in
Emergency Stop
the circuits of the failsafe digital input.
Protected cable
The converter self-test detects errors in
routing, e.g. within
the circuits of the failsafe digital input.
a control cabinet
The self-test of the connected cables with
internally specified dark pulses detects the
following errors:
•
Short-circuit to ground
•
Short-circuit to 24 V supply voltage
Unprotected cable
The converter self-test detects errors in
routing, e.g. cable
the circuits of the failsafe digital input.
carrier or free rout‐
The self-test of the connected cables with
ing
internally specified staggered dark pulses
detects the following errors:
•
Short-circuit to ground
•
Short-circuit to 24 V supply voltage
•
Cross circuit
Depending on the connected external device
Connecting
7.2 Interfaces for the controller
183
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