Optex SP-1, SP-1LH, SP-1 Installation Instructions

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MODEL SP-1 TOUCH SENSITIVE WALL SWITCH

INSTALLATION AND OPERATING INSTRUCTIONS

1. DESCRIPTION

The SP-1 is a touch sensitive wall switch which is generally used as a superior alternative to wall
mounted mechanical push buttons. When touched by the human hand (even through gloves)
the unit operates a set of internal dry contacts. The unit includes an internal timer, an LED
which indicates operation and a redundant backup switch. The SP-1 is intended for indoor use

only.

FIGURE 1: SP-1 OVERVIEW

CONNECTION WIRE
FROM SENSOR TO
PLATE

SEN

POT TO ADJU ST TOUCH
SENSITIVITY

CABLE
CONNECTOR

TIME

POT TO SET TIME
DELAY (1-35 SEC)

2. PHYSICAL MOUNTING

Identify the top of the unit by noting that the LED is on the top face of the backb ox. Remove
the bottom screw of the plate. Note that the top screw includes a spring that goes around
the screw below the plate. Do not lose this spring as its presence is necessary for proper
operation. It is not necessary to remove the top screw with th e spring on it, but to just loosen
this screw and rotate the plate enough to access the mounting screw points. Mount the unit to
the wall using the supplied screws. Note that there are two approaches to mounting. You can
use the holes at the diagonal corners of the box and optionally one of the interior holes for
surface mounting on dry wall or other material. #8 x 1 1/2" Sheet metal screws are provided
for this purpose. Alternately, if you are putting the SP-1 over a US type backbox, you can use
two machine screws (supplied) to mount into the standard backbox tab threads.

Note that the stainless steel plate must be isolated from any conductive (metal)
surface. At least one inch of separation must be maintained between the edge of the
plate and any protruding metal piece.

3. WIRING

The SP-1 has 6 colored wires which are for sensor power and DPST relay output:

Red - "+" DC Power
Black - "-" DC Power
White - Relay Common, Pole 1
Green - Relay Normally Closed, Pole 1
Blue - Relay Common, Pole 2
Orange - Relay Normally Open, Pole 2

© Copyright, 2011, all rights reserved PN# 500-15600
Page 1 Rev. D, 03/11

The relay has 2 amp contacts; the operation of the SP-1 is fail safe. When the SP-1 re ceives
power, its control relay automatically energizes. It de-energizes when the plate is touched. For
applications releasing an electric lock, the following drawing (Figure 2) shows typical connections
of sensor, power supply and both fail safe (secure when powered) or fail secure (released
when powered) electric locks. Note installation of the MOV in parallel wi th the electric lo ck. The
MOV is supplied loose with the SP-1. It is a black or blue disk-like component with two bare
wires for connection. The MOV acts to suppress the inductive kickback from the lock which will
greatly shorten the life of the relay contacts if not suppressed. To work properly it should be
spliced in as close to the electric lock as possible. It has no polarity. If, however,

Securitron's Magnalock is used in the installation, the MOV is not necessary as the
Magnalock is internally suppressed.

The sensor operates on 12-24 volts DC and is normally powered by the same pow er supply that
operates the electric lock. When wiring power, polarity must be observed. Note that the
sensor draws 40 mA when "at rest" and 25 mA when it is releasing the lock. . As an additional
safety feature, the SP-1 includes a low voltage sensing circuit. The unit will keep working
normally if input voltage declines until it reaches roughly 9 volts. At that point, the SP-1 will
automatically act as if all power was removed. If a lock is being controlle d, it will release. Inp ut
voltage could decline if the unit was being operated on batteries and the batteries were
discharging or because of a fault in the power supply.

When employing the cable to make electrical connections, never coil the gray cable within
the white backbox. It must be pulled straight out. A coiled cable in the white backbox will
interfere with proper electronic operation of the unit.

FIGURE 2: SP-1 TYPICAL WIRING

WIRING FOR FAIL SAFE LOCK

POWER SUPPLY
12-24 VDC

+

ELECTRIC

LOCK

CABLE

RED (+ POWER)
BLACK (- POWER)

WHITE (RELAY COM1)
GREEN (RELAY N.C.1)

MOV

WIRING FOR FAIL SECURE LOCK

POWER SUPPLY

RED (+ POWER)
BLACK (- POWER)

CABLE

NOTE 1: MOV NOT NEEDED IF SECURITRON MAGNALOCK USED
NOTE 2: POWER SUPPLY MUST ALWAYS CONNECT DIRECTLY TO

SENSOR. OTHER CONTROL SWITCHES SHOULD BREAK OR PARALLEL RELAY CONTACTS.
NOTE 3: INPUT POWER POLAR I TY MUST BE OBSER VE D.

BLUE (RELAY COM2)

ORANGE (RELAY N.O.2)

MOV

12-24 VDC

+

-

ELECTRIC

LOCK

3.1 DOUBLE BREAK WIRING

Many installations include a controlled entry device such as a digital keypad or card reader.
Such devices typically have a REX (request to exit) input.

If the REX input alone is used for exiting a safety/reliability problem will exist. If the entry
device malfunctions, exit will not be possible and people may be trapped. We therefore always
recommend double break wiring which is supported by the SP-1 because of its two pole relay.
The SP-1's NC contacts are used to break power to the fail safe electric lock while its NO
contacts trip the REX input of the controlled entry device. This releases the lock a second time,
hence the term, "double break". If the controlled entry device fails f or any reason, direct exit is
still possible. This type of circuit works only with fail safe locks but these comprise the great
majority of lock types used for safety related exit.

PN# 500-15600
Page 2 Rev. D, 03/11