Securitron PB4 User Manual
Page 2
PN#
500-16100
Page
2
Rev. C, 2/08
3. LAMP OPERATION
The bicolor LED (Securitron part number 030-12500) can illuminate red or green and has 3
wires attached to it: Red, Green and Black. Black is common DC negative. Red is the +VDC
input to illuminate red. Green is the +VDC input to illuminate green. Note that the black wire
has 2 resistors on it. If the resistors are left as they are, the LED will operate on 24
volts. For 12 volt operation, remove the outer resistor. With this set up, you can use
either color for your indicator or even alternate red and green to show 2 different conditions.
The LED's could be operated, for instance, from an SPDT switch to change colors. You cannot,
however, drive both sides of the LED at the same time (the indicator would show orange)
or the resistors will be overloaded. If you need to be able to drive both colors at the same time
to display a third (orange) condition, remove both resistors on the black wire and connect
individual resistors on the red and green wires. The values would be: 620 Ohms 1/2 watt for 12
volts and 1300 Ohms 1 watt for 24 volts.
4. WIRING
The PB4 can be used in many different ways but the drawings below show two common
applications. The first shows momentary release of a fail safe or fail secure electric lock. The
PB4 indicators are connected so that the green LED is normally on. When the button is pressed,
releasing the lock, the green LED turns off and the red one comes on. The second drawing
shows timed release of a fail safe electric lock using the PB4 and Securitron's TimeMate.
Momentarily pressing the button will release the lock for the amount of time set on the
TimeMate. The indicator will switch from green to red during the lock release period. The wiring
is also done in double break fashion so that even if the timer fails, the button will still be able to
momentarily release the lock. This is for added safety.
POWER
SUPPLY
TIMEMATE
+
YELLOW
RED
WHITE
BLACK
D.C. LOCK
FAIL SAFE
GREEN
PB4
+
BLUE
RED
BLK/LED
BLUE
GRN/LED
POWER
SUPPLY
+
D.C. LOCK
ELECTRIC
PB4
+
BLUE
RED
BLACK
LED
+
GRN/LED
RED/LED
IF FAIL SAFE
IF FAIL SECURE
MOMENTARY RELEASE OF FAIL SAFE OR FAIL SECURE ELECTRIC LOCK
TIMED DOUBLE BREAK RELEASE OF FAIL SAFE LOCK
WHITE
LED
WHITE
LED