Assa Abloy SL500 Owner's Manual page 16

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I/O functions:
- Fire alarm connection
Used to emergency open or fire close the door with mains power on.
- External error indication
Obtained if a lamp or a buzzer is connected.
- Open / Close function
A one button impulse, will alternate between Open and Close. The door will stand open until
next impulse or can after an adjustable time delay automatically start to close even if a new
impulse is not received.
- Nurse function
A pedestrian partial opening in operation mode selections Exit, Auto and Auto partial. The
Nurse impulse hold open time is adjustable.
- Night mode
Remotely put door into exit only via an automated system. Requires a NO contact.
I/0 unit (IOU) P/N: 1007779
16 Issue 2018-05-25 1018022-US-0.0