AX-350DH MK3 - Motion detector OPTEX - Free user manual and instructions
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| Product Type | Outdoor Passive Infrared Motion Detector |
| Brand | Optex |
| Model | AX-350DH MK3 |
| Detection Technology | Dual-element PIR |
| Detection Range | 12 m (40 ft) at 90° |
| Detection Pattern | 15 curtains (9 long, 6 short) |
| Mounting Height | 2.0 – 2.5 m (6.6 – 8.2 ft) |
| Power Input | 9 – 16 V DC, 12 V DC nominal |
| Current Consumption | 45 mA (max.) at 12 V DC |
| Alarm Output | NC/NO selectable, 100 mA (max.) at 28 V DC |
| Tamper Output | NC, 100 mA (max.) at 28 V DC |
| Dimensions (W x H x D) | 150 x 70 x 50 mm (5.9 x 2.8 x 2.0 in) |
| Weight | 130 g (4.6 oz) |
| Operating Temperature | -20°C to +50°C (-4°F to +122°F) |
| Humidity | Up to 95% RH (non-condensing) |
| Pet Immunity | Up to 25 kg (55 lb) |
| LED Indication | Green (power), Red (detection) |
| Protection Class | IP54 (weather resistant) |
| Key Functions | Day/night mode, pulse count, sensitivity adjustment |
| Maintenance | Clean lens with soft, dry cloth; do not use solvents |
| Safety | Low voltage (SELV), conforms to EN 62368-1 |
| Spare Parts & Repairability | No user-serviceable parts; contact qualified service |
Frequently Asked Questions - AX-350DH MK3 OPTEX
What is the detection range of the AX-350DH MK3?
The AX-350DH MK3 has a detection range of 12 meters (40 feet) with a 90° angle, using a curtain pattern of 15 beams (9 long, 6 short).
Can the detector be used indoors?
Yes, but it is designed primarily for outdoor use with IP54 weather resistance. Indoor installation is possible if the environment is dry.
How do I adjust the sensitivity?
Sensitivity is adjusted via a potentiometer inside the unit (requires opening). Turn clockwise to increase, counterclockwise to decrease. Start at mid-range.
Does the detector have pet immunity?
Yes, it features pet immunity up to 25 kg (55 lb). Adjust the mounting height and pattern to avoid triggers from small animals.
What power supply is required?
The detector operates on 9–16 V DC, typically 12 V DC. Connect to a security system or a dedicated power supply (not included). Current draw is 45 mA max.
How do I connect the alarm output?
The alarm output is NC (normally closed) or NO (normally open), selectable by a jumper. Maximum load: 100 mA at 28 V DC. Default is NC.
Why does the LED stay off?
If the green power LED is off, check the power supply and wiring. The red detection LED can be disabled via a jumper. Verify the jumper setting on the PCB.
Can I mount the detector upside down?
No, the detector must be mounted upright with the lens facing the area to be monitored. Inverted mounting will severely reduce detection performance.
How do I clean the lens?
Use a soft, dry cloth to gently wipe the lens. Do not use water, solvents, or abrasive cleaners, as they may damage the optics.
What does the tamper switch do?
The tamper switch is a normally closed (NC) output that opens if the cover is removed. Connect it to your alarm system to detect unauthorized tampering.
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USER MANUAL AX-350DH MK3 OPTEX
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Product information
Brand : OPTEX
Model : AX-350DH MK3
Category : Motion detector