Planning/Configuring
6.4 Flow diagram of the DM-F LOCAL configuration
42
SIMOCODE pro - Fail-Safe Digital Modules
Manual, 11/2017, NEB631679702000/RS-AA/002
6 Start mode of cascade
input
• Automatic start: The enabling circuits are switched to the active position as soon
as the switch-on condition at cascading input 1 is satisfied, i.e. as soon as a static
+24 V DC signal is present (e.g. from T3).
• Monitored start: The enabling circuits are switched to the active position as soon
as the switch-on condition at cascade input 1 is satisfied, i.e. as soon as a static
+24 V DC signal is present (e.g. from T3), and the START button at the
terminal Y33 is actuated (start at falling edge).
7 Start-up testing After a power failure, startup testing requires that the system operator actuates the
sensors at Y12 and Y22 once.
8 Starting after power failure The parameters of the DM-F Local can be defined so that the enabling circuits are
automatically switched to the active position after a power failure, i.e. without
actuation of the Y33 start button.
Requirements:
• Y12, Y22 or the cascading input 1 are set to "monitored start".
• The switch-on condition at the sensor inputs and at the cascade input is satisfied.
• The START button was actuated before the power failure and this was valid, i.e.
the enabling circuits were in the active position.
Function of the cascade input (terminal 1)
As an alternative to using the sensor inputs (terminals Y12, Y22), safety-related tripping can
also take place via the cascade input (terminal 1).
Note
Application / safety relay safety category
If faults can be ruled out (protected laying of the control cable at terminal
1), the application's
safety category corresponds to that of the higher
-level safety relay.
Flow diagram of the DM-F LOCAL configuration
Note
The configuration can only be modified after disconnecting the power supply.
Modifications during operation are not accepted. The device is in the configuration mode if
you configure it under voltage and then deactivate and
reactivate the power supply. The
device is therefore in the safe state and all enabling circuits are deactivated.
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