The Qolsys IQ Motion Sensor QS1231-840 is compatible with all Qolsys brand IQ Panels with a 319.5MHz radio, including the IQ Panel 4 IQP4001. It offers S-Line encrypted technology to protect wireless signal and is pet immune up to 40 pounds.
Sensor Specs
| Manufacturer | Qolsys |
| Part number | QS1231-840 |
| Dimensions | 3.4H x 2.4W x 1.5D in. |
| Wireless signal range | 600ft (200M) in open air |
| Signals | Alarm, alarm restore, tamper, tamper restore, supervisory, low battery |
| Transmitter frequency | 319.5MHz ±15KHz |
| Wireless Protocol | S-Line |
| Transmitter bandwidth | 24KHz |
| Modulation type | ASK-OOK |
| RF output power | 91.1dBuV +/- 5% at 3m |
| Sensor Range | 30 ft (9.1 m) x 40 ft (12.2 m) |
| Horizontal Sensing Angle | 80° |
| Operating Temperature | -10˚C – 50˚C |
| Relative Humidity | 5 – 95% |
| Non-Condensing Storage Temp | -40˚C to 80˚C |
How to install the QS1231-840
Physical installation of the Qolsys QS1231-840 Motion Sensor sensor should follow the manufacturer’s instructions found in the product installation manual. Installation steps from the QS1231-840 manual are below:
A link to the QS1231-840 full manual can be found here:
Mounting the QS1231-840
- The sensor should be permanently mounted in a corner or on a flat wall that is free of vibrations, at a height of 7.5 feet.
- Mount the sensor on an insulated exterior wall facing in.
- Position the sensor to protect an area where an intruder is most likely to walk across the detection pattern.
- Position the sensor so it faces a solid reference point, such as a wall.
- If possible, mount the sensor within 100 ft of the panel. While the transmitter may have a range of 600 ft or more out in the open, the environment at the installation site can have a significant effect on transmitter range. Verify actual transmitter range for each installation.
- Close all windows in an area with an armed motion sensor.
Programming the QS1231-840 with the Qolsys IQ Panel
- Place the IQ Panel into Auto-Learn Mode. To do so, at the panel navigate to:
- Settings
- Advanced Settings
- Enter your Installer or Dealer Code
- Installation
- Devices
- Security Sensor
- Auto Learn Sensor
- With the panel in Auto-Learn Mode, open and close the sensor case to tamper the sensor.
- Program the sensor as needed. Then Click Add to finalize programming.
Programming Instructions for Qolsys 319.5Mhz sensors like the QS1231-840 can be found here: