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    OPTEX CDX Series — Indoor PIR/Microwave Detector Installation Instructions

    September 08, 2026 3 min read

    Installation instructions for the OPTEX CDX-AM/CDX-NAM/CDX-DAM Grade 3 indoor motion detectors, covering wiring, DIP switch settings, and specifications.

    💾 Download Original PDF
    Full text manual (for reference)

    Installation instructions for the OPTEX CDX series indoor PIR/microwave motion detectors — Grade 3 security detectors with wide-area (15m x 15m) or long-range (24m x 2m) down-zone coverage, available in three variants: CDX-AM, CDX-NAM, and CDX-DAM.

    Model Overview

    Model PIR Coverage Microwave Anti-Masking
    CDX-AM 15 x 15m (49 x 49 ft), 85° wide, 82 zones — AIR type (EN 50131-2-2 Grade 3)
    CDX-NAM 24 x 2m (80 x 6.6 ft) narrow, 20 zones — —
    CDX-DAM 15 x 15m (49 x 49 ft), 85° wide, 82 zones 10.525/10.587 GHz AIR type (EN 50131-2-4 Grade 3)

    Safety Warnings

    • Failure to follow warning instructions and improper handling may cause death or serious injury.
    • Failure to follow caution instructions and improper handling may cause injury and/or property damage.
    • Do not obscure partially or completely the detector's field of view.

    Wiring Knockouts

    • Use knockout (1) & (2) for wall mount, or (3) & (4) for corner mount, so the gray section stays in place and triggers the output in a tamper case.
    • Cut out the gray section before installation if mounting on soft material such as plaster board.

    Terminal Connections

    Terminal Function
    (+) / (-) Power input
    SP Spare
    TR Trouble output
    COM Common
    AL Alarm output
    LED Remote LED
    RST Remote self-test (UL: not verified for this operation)
    TP / TP Tamper output

    Wire Gauge / Cable Length (at 12V DC / 14V DC)

    Wire Gauge CDX-AM / -NAM @ 12V (14V) CDX-DAM @ 12V (14V)
    AWG 22 [0.33mm²] 290m (620m) 220m (480m)
    AWG 20 [0.52mm²] 450m (980m) 350m (760m)
    AWG 18 [0.83mm²] 720m (720m) 560m (1,210m)

    DIP Switch Settings

    Factory defaults shown in bold/italic in the original manual; summarized below:

    Switch Item ON OFF
    1 LED ON/OFF LED always activated (default) LED controllable remotely via LED terminal (Open=OFF, 0V=ON)
    2 Detection Mode — STANDARD — complies with EN 50131-2-2/-2-4
    3 PIR Sensitivity HIGH — for sites requiring greater sensitivity STD (default) / SP for hostile areas (not UL evaluated)
    4 Anti-Masking ON/OFF Switches 5 & 6 activated Switches 5 & 6 not activated
    5 Anti-Masking Sensitivity HIGH — complies with EN 50131-2-2/-2-4 in HIGH setting STD — standard application
    6 Anti-Masking Output Select ALARM & TROUBLE output in masking condition TROUBLE only

    Optional Plug-In End-of-Line Resistor (EOL)

    A plug-in EOL resistor option is available (not evaluated by UL) for connection to control panels requiring end-of-line resistance monitoring.

    Full Specifications

    Spec CDX-AM CDX-NAM CDX-DAM
    Detection Method Passive infrared Passive infrared & microwave
    Standard / Grade EN 50131-2-2 Grade 3 Grade 3 EN 50131-2-4 Grade 3
    Power Input 9 to 18V DC
    Current (normal / max @12V DC) 17mA / 20mA 17mA / 20mA 19mA / 26mA
    Alarm Output N.C., 28V DC 0.2A max (resistive load)
    Tamper Output N.C., opens when cover removed or wall tamper switch operates. 28V DC 0.1A max
    Trouble Output N.C., 28V DC 0.2A max (resistive load)
    Operating Temperature -10°C to +50°C (14°F to 122°F)
    Environmental Humidity 95% max
    RF Interference No alarm at 10V/m
    Mounting Height 1.8 to 2.4m (6 to 8 ft)
    Weight 150g 150g 180g

    Important Notes

    • UL requires CDX to be connected to a UL-listed control panel or listed burglar alarm power supply, nominal input 12V DC, 26mA max, with battery standby time of 4 hours.
    • CDX shall be installed per the National Electrical Code (NEC 70) and CSA 22-2 Part 1 (Canada).
    • The distance indications for MW/PIR overlap are guides only — do not set the MW sensitivity too low or too high, which may cause an MW failure or false alarm. Set the MW and PIR detection areas to overlap for higher detection performance and to prevent false alarms.
    • CDX series is only a part of a complete system; OPTEX cannot accept full responsibility for damages or consequences resulting from an intrusion.