Velleman HAA2801 - Manual (Page 10)

10
CONNECTION TERMINALS
NOTE:
DRY CONTACT
A dry contact means that no electricity is connected to it. It is prepared for free connections.
N.C.
Normally Closed, the contact is closed circuit at normal state. It is open circuit when active.
N.O.
Normally Open, the contact is open circuit at normal state. It is closed circuit when active.
TRANSISTOR OPEN COLLECTOR OUTPUT
An open collector output is equivalent to a Normally Open (N.O.) contact referring to ground similar
to a relay contact referring to ground. The transistor is normally OFF, and its output switches to
ground (-) when active. The open collector can only provide switching function for small power but
it is usually good enough for controlling of an alarm system. The maximum rating is 24V DC/100mA
Sink
OPEN COLLECTOR
OUTPUT ----
Output switches to
ground when activated
N.O. CONTACT
OUTPUT ----
Output switches to
ground when activated
EQUIVALENT
-
AL
ARM O/P -
KEY ACT O/
P
-
N.O
. -
COM -
N.C
. -
N.O
. -
COM -
N.C
. -
N.O
. -
COM -
N.C
. -
T
AMPER
-
GND(
-
)
-
DOOR SENS -
O/P 1 INHI
B
-
IN
T. L
OCK
-
DU OUT -
DOOR BELL I
N
-
EG IN -
DATA
I/O
-
KEYP
AD PW
R
-
GND(
-
)
-
12-24V DC
OPEN COLLECTOR OUTPUT OPEN COLLECTOR OUTPUT 1A RE
LA
Y DRY CONT
ACT
S
FOR AU
XILIARY CONTROL
1A REL
AY
DRY CONT
ACT
S
FOR AU
XILIARY CONTROL
5A RE
LA
Y
DRY CONT
ACT
S
FOR DOOR STRIKE OPEN COLLECTOR OUTPUT OPEN COLLECTOR OUTPUT INPUT/OUTPUT FOR SPLIT
-DECODED SIGNAL
S
POWER OUTPUT FOR KEYP
ADS
COMMON GROUND POWER INPUT FOR SYSTEM
N.C. S
W
COMMON GROUN
D
N.C. S
W
N.
O. S
W
N.
O. S
W
N.
O. S
W
OUTPUT 1O UTPUT 2O UTPUT 3