RISCO RK-150T Dual-Technology Ceiling Motion Detector — Installation Manual

Installation and technical manual for the RISCO RK-150T, a microprocessor-based dual-technology (PIR + microwave) ceiling-mounted motion detector.

General Description

The RK-150T is a ceiling-mounted detector combining infrared (PIR) and microwave (MW) detection technology with a 110° wide-angle Fresnel lens covering a 360° field-of-view. Combining both technologies eliminates false alarms and provides superior RFI/EMI protection.

• IR channel: responds to differences between the thermal radiation caused when an intruder crosses the protected area and the ambient thermal radiation.
• MW channel: transmits signals and analyzes reflected frequency echo changes due to the Doppler effect caused by a moving intruder.
• An alarm is triggered only when BOTH channels detect simultaneously — greatly reducing false alarms and increasing catch performance.

Features

• Dual IR and MW technologies, microprocessor controlled
• Automatic true temperature compensation (patent pending proprietary algorithm)
• Microwave range adjustment via onboard potentiometer
• Superior rejection of fluorescent interference
• Alternate polarity pulse count
• High RFI immunity: 30V/m up to 1 GHz
• Optional memory function (latches alarm events)

LED Display

When the LEDS jumper is IN:

• Yellow LED — indicates PIR detection
• Green LED — indicates MW (microwave) detection
• Red LED — indicates alarm (simultaneous PIR and MW detection)

When the MEMORY jumper is OUT (memory-equipped units only), events on the Red LED are latched.

Installation

Step 1 — Preliminary Considerations

The RK-150T is designed to be installed above the center of the protected area. For best coverage, its lens is arranged into three all-round optical levels covering 12 external sectors, 12 middle sectors, and 7 internal sectors.

Step 2 — Frontal Cover Removal

Remove the front cover by holding the unit's base in the palm of your hand and turning the cover clockwise.

Step 3 — Mounting

1. Open the knockout mounting and cable holes on the back cover using a drill or other suitable tool. Use the 4 marks on the back of the package to guide hole placement.
2. Insert the cable through the cable hole.
3. Mount the back cover onto its final position.

Step 4 — Terminal Wiring

Wire the cable to the terminal block at the bottom of the PCB:

• 12VDC: power supply input
• ALARM: normally closed output
• TAMPER: normally closed dry output

Note: for memory-equipped units, use the RESET terminal to input an active-low reset signal to clear the latched LED.

Step 5 — Jumper Settings

The RK-150T has 3 jumpers, each either IN (inserted) or OUT (unused). Unused jumpers are placed on one leg only.

Step 6 — Walk Test

After a two-minute warm-up period from power up, walk test the detector across the entire protected area to verify proper operation. Caution: make sure to replace the front cover before performing the walk test.

The MW range can be adjusted using the potentiometer on the left side of the PCB. Set it to the lowest position that still provides coverage for the entire protected area.

Step 7 — Final Setup

After completing installation and testing, reset the LED and Pulse Count jumpers to their desired final position, if necessary. The unit is then ready for normal use.

Note: the MW detection pattern corresponds to the optical coverage but depends on reflections from the protected area — verify actual coverage by performing a walk test.

Specifications

Electrical

Optical

Physical & Environmental

UL Notes

• The tamper switch must be connected to a 24-hour alarm circuit.
• The detector is intended to be connected to a listed burglar alarm control unit capable of providing 4 hours of standby power.
• Units containing the memory function have not been investigated by UL and are not UL Listed.

Warranty

RISCO Group warrants its products free from defects in materials and workmanship under normal use for 24 months from the date of sale. Since the seller does not install or connect the product, and the product may be used with components from other manufacturers, RISCO's liability is limited to repair or replacement (at RISCO's option) within a reasonable time after delivery for any product not meeting specifications. No other warranty, express or implied (including merchantability or fitness for a particular purpose), is made. RISCO shall not be liable for consequential or incidental damages. Warning: this product should be tested at least once a week.