Securitron DKC - Manual (Page 5)

PN# 500-33510
Page 5 Rev. A, 06/13
DKC CPU Board Configuration
AC Lock with AC Power
When a fail secure lock operating on AC is used, power
must be applied to release the lock. The two
transformer secondary wires connect to the AC input
terminals (there is no polarity with AC). Power from one
terminal then goes to the common of the associated
door relay. The NO contact of the relay will power the
lock to release the door when a correct code is entered.
Note that if the AC lock is fail safe (secure when
powered) make the connection to the lock from the NC
terminal.
DKC
COM
AC LOCK – AC POWER WIRING
Figure 2
NO
AC FAIL SECURE
LOCK
TRANSFORMER
12 OR 24 VAC
NC
MAIN IN
DC Lock with AC Power
Most DC electric locks can be operated from an AC
transformer when the DKC is used. The DKC converts
the input AC to DC to operate the lock. The lock must
accept full wave rectified DC power. This is true of most
DC locks (including Securitron Magnalocks) but some
specialty units require regulated DC power.
The DC terminals furnish output power for the lock. DC
locks must not draw more than 1 Amp. The positive DC
terminal connects to the common of associated door
relay and either the NO terminal (if the lock is fail
secure) or the NC terminal (if the lock is fail safe)
connects to the locks’ positive power input. Only
connect one of these terminals. Consult lock
instructions to determine if the lock is polarized and
must connect lock power correctly to positive and
negative.
Note that many DC lock installations call for battery
backup. To achieve this, employ a DC battery backup
power supply.
DKC
NC COM
DC LOCK – AC POWER WIRING
Figure 3
NO
TRANSFORMER
12 OR 24 VAC
DC FAIL SECURE OR
FAIL SAFE LOCK
DC
‐
DC
+
+
‐
IF
FA
IL
SE
CU
RE
IF
FA
IL
SA
FE
MAIN IN
DC Lock with DC Power
The DKC does not require regulated power but certain
specialized electric locks do. Please match the power
supply to the requirements of the lock. DC locks come
in fail secure (secure when not powered) and fail safe
(secure when powered) versions. All magnetic locks are
fail safe. The positive DC terminal connects to the
common of associated door relay and either the NO
terminal (if the lock is fail secure) or the NC terminal (if
the lock is fail safe) connects to the locks positive
power input. Only connect one of these two terminals.
Consult lock instructions to determine if the lock is
polarized and must connect lock power correctly to
positive and negative.
DKC
NC C
DC LOCK – DC POWER WIRING
Figure 4
NO
POWER SUPPLY
12 OR 24 VDC
DC FAIL SECURE
OR FAIL SAFE LOCK
DC
‐
DC
+
+
‐
IF
FA
IL
SE
CU
RE
IF
FA
IL
SA
FE
+
‐
DC POWER NEED NOT
BE REGULATED
MAIN IN