
MorphoAccess® SIGMA Series - Administrator Guide
Compatibility with an Access Control System
2017_2000025464-v03
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467
July 17
External activation of the internal relay
Description
The administrator can enable this function to allow the activation of the terminal internal relay
via a push button connected between the LED1 and the GND wires. When this function has been
enabled, the internal relay is activated in two cases: when the terminal authorizes the access
after access rights check, and when a contact is closed between the LED1 and GND terminals.
A typical application of this feature is to open the door from inside an area protected by a
MorphoAccess® SIGMA Family terminal (as depicted in the figure below):
To enter in the protected area the user must be successfully recognized by the
MorphoAccess® SIGMA Family terminal,
To exit from the protected area, the user presses a simple push-button connected
between the LED1 and GND wires of the MorphoAccess® SIGMA Family terminal.
Figure 357:
Internal relay activated by LED 1 signal