Velleman HAA2850 - Manual (Page 7)

HAA2850
v4 - 15.11.2013
7
©Ve lleman nv
in parallel with its power terminals. The diode is not required for AC
operated locks.
Note 2: always ground the GND (-) terminal of the keypad to earth to avoid
Electro-Static Discharges.
Note 3: always connect the DOOR SENS [d] to ground (-) when not in use.
o
stand-alone system with inhibited authorization code
•
Simply connect the O/P 1 INHIB (output 1 inhibit) with out
Warning 1: make sure nobody gets trapped inside the building when
starting the door lock-inhibit function.
Warning 2: the inhibit authorization code should be treated highly
confidential.
Note 1: use output 2 as authorization control. The administrator can use
user code 2 to prevent operation of the electric lock e.g. to
prevent unauthorized access at night time or outside office hours.