SECO-LARM Enforcer E-960 Series — Twin Photobeam Detector Installation Manual

Installation manual for the SECO-LARM Enforcer Twin Photobeam Detectors (models E-960-D90, E-960-D190, E-960-D290, E-960-D390) — outdoor/indoor perimeter security beam sensors with laser-assisted alignment.

Features

• Twin beams provide reliable perimeter security, minimizing false alarms from falling leaves, birds, etc.
• Lensed optics reinforce beam strength and resist false alarms from rain, snow, or mist.
• Weatherproof, sunlight-filtering case for indoor and outdoor use.
• Anti-frost system keeps the beam functioning in extreme conditions.
• Automatic input power filtering with noise-rejection circuitry.
• N.C./N.O. alarm output and N.C. tamper circuit included; non-polarized power inputs.
• Built-in laser beam alignment system for quick, easy installation.
• Adjustable interruption (delay) time for nearly any situation.

Box contents: 1 transmitter, 1 receiver, 2 mounting plates, pole mounting brackets (2 sets), mounting hardware.

Choosing a Location

To prevent erratic operation or false alarms:

• Don't mount near trees, bushes, or leafy vegetation that could blow into the beam path.
• Avoid locations where the transmitter or receiver could be splashed by water or mud.
• Avoid sudden bright light exposure (floodlights, headlights).
• Don't let sunlight enter the transmitter's sensing spot — if needed, orient so the receiver (not the transmitter) faces the sun.
• Avoid locations where animals could break the beam.

Typical Installation

The lens can be adjusted ±90° horizontally and ±5° vertically. Install at 32"–39" (80–100cm) above the ground for most situations.

Running the Cable

Run a cable from the alarm control panel to the photobeam sensor. Use electrical conduit if burying the cable; shielded cable is strongly recommended.

Note: when two or more sets are connected, divide the max cable length above by the number of sets. Power line can be wired up to 3,300 ft. (1,000m) using AWG22 telephone wire.

Wiring the Transmitter

Wall Mount

1. Remove the cover and the screw under the lens unit to detach the mounting plate.
2. Wiring from inside the wall: break a hole in the mounting plate's rubber grommet, pull the cable through, then route it out the top hole of the sensor unit. Attach the mounting plate with two mounting screws, reattach the sensor unit, connect the wires, and snap the cover back on.
3. Wiring along the wall surface: break out one of the two plastic knockouts on the back of the unit, pull wiring through, and route it out the top hole. Attach as above.

Pole Mount

Requires a pole mounting bracket. Remove the cover and mounting plate as above, break a hole in the grommet, pull the cable through, mount the bracket to the pole, then reattach the sensor unit and wire connections.

Wiring Terminals

Transmitter: Power (+/−, 10–30VDC non-polarized) and Tamper output (N.C. switch, 120V AC/DC, 1A — triggers if cover is detached).

Receiver: Power (+/−, 10–30VDC non-polarized), Alarm output (N.C./N.O., 120V AC/DC, 1A), and Tamper output (N.C. switch, 120V AC/DC, 1A). Screw terminals snugly — tight enough not to slip, not so tight they break. Unused terminal screws should still be tightened. Grounding may be necessary depending on location.

Multiple sensors can be wired to a single control panel as: (1) a standard single sensor pair, (2) dual sensor pairs on separate alarm channels, or (3) sensor pairs in-line on a single shared channel.

Adjusting the Alignment

Once mounted and powered, the transmitter and receiver can be adjusted ±5° vertically and ±90° horizontally. Two adjustment methods:

1. Laser adjustment: remove the transmitter cover and turn on the laser (ON/OFF switch) — a red dot shows where the beam is aimed. Adjust the transmitter's angle until the dot is centered on the receiver and both receiver LEDs turn off (you may need to adjust the receiver's angle too). Repeat for the receiver, then turn off the lasers and replace the covers. Warning: do not look directly at the lasers.
2. Eyeball adjustment: remove the transmitter cover and look into one of the four alignment viewfinders at a 45° angle. Adjust the lens angle until the receiver is clearly visible, then repeat for the receiver. If you can't see the opposite unit, hold a sheet of white paper near it and move your eye about 2" (5cm) from the viewfinder.

Receiver LED signal strength: Both LEDs OFF = best signal; one LED ON = good; both LEDs ON = re-adjust needed.

Fine-Tuning with a Voltmeter

Set a volt-ohm meter to 0–10VDC, insert the red probe into (+) and black into (−), then adjust horizontal and vertical angle for the highest voltage reading (8VDC is the maximum possible). Voltage output guide: 5–8V = best, 2.5–5V = good, 1.5–2.5V = fair, below 1.5V = re-adjust. Do not interrupt the beam while adjusting.

Adjusting the Delay (Interrupt) Time

The delay time knob sets how long the beam can be interrupted before triggering the alarm (adjustable 50ms–700ms). A short interrupt time (high sensitivity) catches fast-moving intruders but is more prone to false alarms; a long interrupt time reduces false alarms but may miss fast movers. Adjust to the site's situation, then fine-tune after a walk-through test.

Testing the Unit

1. Power up the transmitter and receiver.
2. If the yellow or red LED stays lit even when the beam is uninterrupted, re-adjust the alignment.
3. Walk between the transmitter and receiver at various speeds to interrupt the beams, adjusting the delay time knob as needed.

Note: the alarm only triggers if both the upper and lower beams are interrupted simultaneously. Test the detector periodically to confirm alignment and delay settings remain suitable for the site.

Specifications

Troubleshooting

SECO-LARM® U.S.A., Inc., 16842 Millikan Avenue, Irvine, CA 92606. SECO-LARM reserves the right to change specifications without notice.