PN# 500-15600
Page 3
Rev. D, 03/11
FIGURE 3: DOUBLE BREAK WIRING
CABLE
RED (+ POWER)
BLACK (- POWER)
WHITE (RELAY COM1)
GREEN (RELAY N.C.1)
POWER SUPPLY
12-24 VDC
+
MOV
ELECTRIC
LOCK
ENTRY CONTROL
REX INPUT
ENTRY CONTROL
LOCK CONTROL
NC CONTACTS
BLUE (RELAY COM2)
ORANGE (RELAY N.O.2)
FAIL SAFE
4. TIMED OPERATION
In timed operation, the SP-1 will operate its contacts for 1-35 seconds after it is touched. Time
duration is set by adjusting the potentiometer located in the center of the control circuit board
(see Figure 1). The pot is factory set for approximately 7 seconds. Time is increased by
turning the pot clockwise. Timing is of the "retriggerable, off delay" type. This means first
that the contacts will stay switched as long as the person's hand remains on the plate. Timing
starts when the hand is removed and if the plate is touched a second time during the switched
cycle, the contacts will remain switched for the selected time which will be “retriggered”.
If the SP-1 is being used to trigger some other device such that only a momentary signal is
required, turn the pot all the way counterclockwise and the contacts will switch for roughly one
second.
5. LABELING
A vinyl press-on label is supplied with the unit which says, "TOUCH TO EXIT" and includes a
graphic representation of a hand. An international handicap symbol is also available (ordered
separately SP-1LH). The label may be applied to the stainless steel plate completely or portions
may be applied only to create the desired prompt. To use the label, first slowly remove the
backing sheet by starting peeling from one corner. Too rapid removal of the backing may take
some of the label with it. When the backing has been removed, you can "edit" the label copy by
carefully removing portions of the message. Use a knife tip to peel away the vinyl characters.
Then line up and press the label top carrier onto the plate. Firmly rub all over the top carrier
sheet to apply the vinyl lettering to the stainless plate and remove air bubbles. Then slowly peel
off the top carrier sheet, again starting from a corner. If while peeling some of the vinyl may
come off with the top carrier, rub over the carrier again aggressively to make the vinyl adhere.
6. USE OF REDUNDANT BACKUP SWITCH
When you open or remove the plate from the backbox, you'll
notice a push button switch soldered to the circuit board by two
wires. The switch is lightly stuck down to the backbox base. As
factory delivered, pushing the button breaks the connection
between the white (COM1) and green (NC1) wires just the same
way as if the plate was touched. It does not however affect the
COM2 and NO2 circuit (blue and orange). If the application
for the SP-1 is safety related and employs the NC
contacts, remove the plastic plug and mount the switch
through the hole in the bottom of the backbox as shown in
the drawing on the right. With the switch mounted, there are
two independent controls which can release the door. In the event that the sensor fails, the
button will still work. Of course, in a double break installation (see Figure 3) the button will not
activate the REX input of the entry control device because its use only affects the NC contacts,
nor will it activate the SP-1's internal timer but the lock will still release for safety as long
as the button is held. Never cut the wires from the switch to the circuit board. If the
switch is not used, it must be left inside the backbox as its wires are part of the circuit.
