gefran SIEIDrive ADL300 Safety User Manual page 29

1. SYSTEM CONTROL UNIT (SCU) shall use ADL300 safety integrated function STO as means
to stop cabin. Two separated and independent wirings shall be used to activate/deactivate
ENABLE and SAFETY ENABLE signals.
2. SCU will monitor both DRIVE OK and SAFETY OK relay.
3. ADL300 shall be enabled using both ENABLE and SAFETY ENABLE signals
4. Any time Motor comes to a stop SAFETY OK relay and DRIVE OK shall be monitored by SCU,
switch from open status to closed status. In case of unexpected relay status (SAFETY OK,
DRIVE OK) is found SCU will not issue a restart (K1, K2 remain open) until condition is
cleared.
ADL300 will log any unexpected relay conditions. Operators witnessing unexpected relay
conditions shall return ADL300 unit for revamping.
It is highlighted here that wiring used for ENABLE and SAFETY ENABLE connections must be
protected against external damage (armouring, cable ducting) and protected by means sleeve
rated to 600V.
Separate wirings are necessary for fault tolerance of 1 to be supported at system level.
It should be noticed that any damage to wirings can take conductors either to:
• Short circuit
• Open circuit
Any of the above cases would prevent current from flowing in conductors making Safety function
active. Same design philosophy should be used for feedback conductors: current flow in wirings is
the normal condition, so that any damage would issue an alarm and be easily identified.
Following is a specific ADL300 design case using no contactors.
1S9STOEN_26-5-17_ADL300_STO_STO
Figure 15 ADL300 contactor-less application design case
Pag. 29/30