1Purpose and Functions
The high-quality ACTii AC7051 photoelectric barrier with a range of up to 15 meters is a professional solution designed for security systems and gate automation. The device consists of a transmitter and receiver operating on active infrared technology (940nm). It is ideal as a safety photocell for sliding, swing, and garage gates, effectively preventing them from closing when an obstacle (vehicle, person, or animal) is in the path. Thanks to universal power supply and weather resistance, it can also be used as an alarm sensor in perimeter security systems for fences.
Key features:
- ✔ Compact dimensions and aesthetic design
- ✔ Operating range up to 15 meters
- ✔ Wide power supply range: 12V - 24V AC and DC
- ✔ NO or NC relay output (1A 36V)
- ✔ Resistant to harsh weather conditions (sealed housing)
- ✔ Advanced 940nm active infrared technology
Operating principle:
The transmitter (TX) emits an invisible infrared beam to the receiver (RX). Interrupting this beam by any object causes an immediate change in the status of the built-in relay, which sends a signal to the gate controller or alarm system.
2Technical Specification
| Technology | Active infrared beam |
| Frequency | 1.92KHz |
| Wavelength | 940nm |
| Alarm output | Relay NO or NC; 1A max 36V |
| Current consumption | Receiver (RX) 15mA, Transmitter (TX) 30mA |
| Barrier range | ≤ 15m (may decrease by 30% in rain/fog) |
| Operating temperature | -10°C to +70°C |
| Material | ABS resin (UV resistant) |
| Power supply | 12V - 24V DC or AC |
| Product dimensions | 49.2 x 76 x 21.6 mm |
| Weight | 90g |
| Certificates | CE, RoHS |
3Installation and Connection
Mounting rules:
To ensure optimal device performance, the mounting height should be above 20 cm from the ground. The distance between the transmitter and the receiver should not be less than 2 meters.
Transmitter (TX):
- • Connect power to terminals V+ and V- (12-24V AC/DC).
- • Ensure the LED indicates operation.
Receiver (RX):
- • Connect power (12-24V AC/DC).
- • Use COM and NO (or NC) contacts for connection to the controller.
- • Configure the Jumper for NO or NC mode depending on the controller requirements.
Calibration procedure:
- Mount the transmitter and receiver at the same height, perfectly opposite each other.
- After turning on the power, align the position of the devices until the LED on the receiver goes out (or changes state), which means the beam is correctly established.
- Test the barrier by cutting the beam with your hand – you should hear the relay click in the receiver.
- Put on the covers, ensuring the rubber seals are correctly seated to ensure tightness.
4Safety and Maintenance
Important safety instructions (EU Compliance):
- • Installation should be carried out by a person with appropriate technical qualifications.
- • Before starting mounting work, strictly disconnect the system power.
- • The device operates on low voltage (12-24V). It must not be connected directly to the 230V AC mains.
- • Regularly check the cleanliness of the front cover of the transmitter and receiver. Dust, mud, or snow can limit the operating range.
- • For outdoor mounting, ensure the rubber seals are correctly installed to prevent moisture from entering the electronics interior.
5Kit Contents
The package contains the following items:
- ● 1x Transmitter (TX)
- ● 1x Receiver (RX)
- ● 2x Rubber seal
- ● Set of wall plugs and mounting screws
- ● User manual