1. Introduction
Image 1.1: The SOS 12 Siren Operated Sensor unit alongside its 'Siren Activated' informational sign.
Image 1.2: The official logo for the SOS Siren-Operated Sensor.
1.1 Product Overview
The Generic SOS 12 Siren Operated Sensor is an emergency access system designed to automatically open gates, doors, parking arms, barriers, or roll-up doors upon recognition of an emergency vehicle's 'Yelp' siren. This system provides a cost-effective and efficient method for emergency responders to gain access to properties without requiring codes, keys, or stopping their vehicle, thereby saving critical time in emergency situations.
1.2 Key Features
- Automatic activation by emergency vehicle 'Yelp' siren.
- NEMA 4 enclosure for robust outdoor protection.
- Adjustable sensitivity via potentiometer dial.
- Customizable gate hold-open times (single vehicle, 15 minutes, or latch open).
- Dual reset buttons (internal and external).
- Wide voltage compatibility: DC 9-30V or AC 9-16V.
- Low power consumption.
- Operating temperature range: -30°F to 120°F (-34°C to 49°C).
2. Safety Information
Read all instructions carefully before installation and operation. Failure to follow these instructions may result in property damage, injury, or improper system function.
- Electrical Safety: Ensure power is disconnected before performing any wiring. All electrical work should be performed by a qualified electrician in accordance with local codes and regulations.
- Gate Safety: This device controls automated gates. Ensure all gate safety mechanisms (e.g., photo-eyes, safety edges) are properly installed and functioning to prevent entrapment or injury.
- Mounting: Mount the unit securely to prevent it from falling or being dislodged.
- Authorized Personnel: Only authorized and trained personnel should install, maintain, or troubleshoot this system.
- Intended Use: This device is intended for emergency vehicle access. Do not use for purposes other than its specified function.
3. Installation and Setup
3.1 Components Included
- SOS 12 Siren Operated Sensor Unit
- Siren Test CD (or download instructions)
3.2 Tools and Materials Required
- Screwdriver set
- Wire strippers
- 18-22 AWG wire (not included)
- Mounting hardware (screws, anchors suitable for mounting surface)
- Multimeter (for verifying voltage)
3.3 Mounting the SOS 12
The SOS 12 unit features a NEMA 4 enclosure, designed for outdoor installation. It should be mounted in a location where it can reliably detect emergency sirens, typically near the gate or access point. Ensure the up-front microphone is unobstructed and facing the direction from which emergency vehicles will approach.
- Select a suitable mounting location that is secure and allows for optimal sound detection.
- Use appropriate mounting hardware to securely fasten the unit to a wall, post, or other stable surface.
- Ensure the unit is level and the microphone is clear of obstructions.
3.4 Wiring Connections
The SOS 12 requires power and provides a trigger output to the gate operator. Always disconnect power to the gate operator before making any wiring connections.
- Power Input: Connect the power supply to the designated terminals. The unit accepts DC 9 to 30 volts or AC 9 to 16 volts.
- Amp Draw: The unit draws 0.1 mA when listening and 25 mA during a trigger event.
- Trigger Output: Connect the trigger output wires from the SOS 12 to the gate operator's input terminals that control the gate opening function. Refer to your gate operator's manual for specific wiring instructions.
- Wire Gauge: Use 18-22 AWG wire for all connections.
4. Operation
4.1 Siren Recognition
The SOS 12 is programmed to recognize the 'Yelp' siren pattern commonly used by emergency vehicles. Once the 'Yelp' siren is detected for a continuous period of 3 seconds, the unit will send a trigger signal to the connected gate operator, causing the gate to open.
4.2 Adjusting Sensitivity
The unit's sensitivity to sound can be adjusted using the potentiometer dial located inside the enclosure. This allows you to fine-tune the detection threshold to suit your environment and prevent false triggers while ensuring reliable activation.
| Sensitivity Setting (0-9) | Trigger Decibel Level | Description |
|---|---|---|
| 0 | Will not trigger | Unit is inactive, no siren will trigger it. |
| 3 | 125 decibels | Low sensitivity, requires very loud siren. |
| 5 | 105 decibels | Medium sensitivity, suitable for most environments. |
| 7 | 95 decibels | High sensitivity, detects sirens from further distances. |
| 9 | 80 decibels | Very high sensitivity, for quiet environments or distant detection. |
4.3 Programming Gate Behavior
The SOS 12 is equipped with four internal switches that allow customization of the gate's behavior after activation. These switches control the duration the gate remains open.
- Single Vehicle Entry: The gate opens and then closes after a standard cycle, suitable for allowing one emergency vehicle through.
- Hold for 15 Minutes: The gate remains open for approximately 15 minutes, then automatically closes.
- Latch Open: The gate remains open indefinitely until manually reset.
Refer to the internal diagram or specific instructions provided with your unit for the exact switch configurations for each mode.
4.4 Reset Function
The SOS 12 features two reset buttons: one on the exterior of the enclosure and another on the circuit board inside. Both buttons perform the same function, which is to reset the unit and close a latched-open gate.
4.5 Testing the Unit
Regular testing ensures the SOS 12 is functioning correctly. A siren test CD is included, or an MP3 file can be downloaded from www.sosgate.com. It is recommended to test the unit with a live siren twice a year to verify optimal performance and sensitivity settings.
5. Maintenance
The SOS 12 is designed for minimal maintenance due to its robust NEMA 4 enclosure. However, periodic checks are recommended to ensure continued reliable operation.
- Visual Inspection: Periodically inspect the unit for any visible damage, loose wiring, or obstructions to the microphone.
- Cleaning: Gently clean the exterior of the unit, especially the microphone area, to remove dirt, dust, or debris that could impair sound detection. Use a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Functionality Test: Perform a siren test (as described in Section 4.5) at least twice a year to confirm proper operation and sensitivity.
6. Troubleshooting
This section addresses common issues you might encounter with your SOS 12 unit.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not trigger with siren. | Low sensitivity setting. Microphone obstructed. Incorrect siren type. Power issue. Faulty wiring to gate operator. | Increase sensitivity using the potentiometer. Clear any obstructions from the microphone. Ensure 'Yelp' siren is used for at least 3 seconds. Verify power supply to the unit. Check trigger output wiring to gate operator. |
| Unit triggers too easily or falsely. | High sensitivity setting. Environmental noise interference. | Decrease sensitivity using the potentiometer. Consider relocating the unit if excessive ambient noise is a persistent issue. |
| Gate does not close after activation. | Unit programmed to 'Latch Open' mode. Gate operator issue. | Press the reset button (external or internal). Check gate operator for proper function and safety devices. |
| No power to the unit. | Power supply disconnected or faulty. Incorrect voltage. | Check power connections and power source. Verify input voltage is within DC 9-30V or AC 9-16V range. |
7. Technical Specifications
- Model: SOS 12
- Voltage: DC 9 to 30 volts or AC 9 to 16 volts
- Amp Draw: 0.1 mA (listening), 25 mA (triggered)
- Wire Gauge: 18-22 AWG (not included)
- Operating Temperature: -30°F to 120°F (-34°C to 49°C)
- Enclosure Rating: NEMA 4
- Dimensions: Approximately 6 x 4 x 2 inches
- Included Components: Siren Sensor
8. Warranty and Support
8.1 Warranty Information
The SOS 12 Siren Operated Sensor comes with a 5-year warranty from the date of purchase, covering defects in materials and workmanship under normal use. This warranty does not cover damage caused by improper installation, misuse, abuse, or unauthorized modifications. Please retain your proof of purchase for warranty claims.
8.2 Further Support
For additional information, technical assistance, or to download the siren test MP3 file, please visit the official website: www.sosgate.com.