Siemens 340 Manual page 38

Description
3.5 Functions
Configuration with 3SK1 safety relay/fail-safe controller by means of wiring
In a configuration without device connectors, the motor starters are interfaced to the 3SK1
safety relay or to the fail-safe controller and safety-related shutdown by means of wiring. If
steps are taken to ensure that the cables are laid in such a way that they are protected
against a cross-circuit/line-to-line fault, safety-related shutdown of A1 (L+) via a safety-
related output of the control suffices. If this cannot be ensured, or if a PM-switching output is
used, both A1 (L+) and A2 (M) must be shut down via a safety-related output. In both cases,
safety-related shutdown in compliance with SILCL 3 to EN 62061, PL e/Cat. 4 to EN ISO
13849-1 is achieved.
For units with a 24 V DC supply voltage, safety-related shutdown via the IN1 and IN2 inputs
is alternatively possible. Thus, operational switching takes place via the safety-related output
of the fail-safe controller/evaluation unit.
Depending on peripherals used, shutdown is in one or two channels:
● PM (PPM)-switching: shutdown is in two channels.
● PP-switching: shutdown is in one channel.
Single-channel switching achieves SILCL 3 to EN 62061, PL e/Cat. 4 to EN ISO 13849-1
if steps are taken to ensure that the cables are laid in such a way that they are protected
against a cross-circuit/line-to-line fault.
Typical circuits and further information
Function test interval for 3RM11/3RM13 Failsafe motor starters
In continuous operation, the key safety values apply in the case of a function test interval
(state change of the outputs) ≤ 1 year.
Annual function test
• Actuate the connected sensors.
• Check their effect on the safety relay and the downstream actuators.
• Activate the safety relay via the connected sensors.
• Check their effect on the safety relay and the downstream actuators.
• Defective devices must be replaced.
You will find typical circuits for safety-related applications of the 3RM11/3RM13 Failsafe
motor starters in combination with 3SK1 safety relays or with interfacing to a fail-safe
controller/evaluation unit in Chapter "Typical circuits for 3RM1 Failsafe (Page 150)".
You can find the technical data for safety applications in Chapter "General safety data
(Page 121)".
You can find more information on the safety relays in the applicable manuals of the devices
on the Internet; see Chapter "Further documentation (Page 11)".
38
WARNING
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002