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    • Home  / Product Manuals & Documentation
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    SECO-LARM SK-4131-SPSQ — Split Series Keypad with Proximity Card Reader Specifications

    September 08, 2026 2 min read

    Product specification sheet for the SECO-LARM ENFORCER SK-4131-SPSQ Split Series Keypad with Proximity Card Reader, supporting up to 1,200 users.

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    Full text manual (for reference)

    Product specification sheet for the SECO-LARM SK-4131-SPSQ Split Series Keypad with Proximity Card Reader, supporting up to 1,200 users.

    Overview

    The SK-4131-SPSQ is a split-series access control system: the keypad and controller are physically separate, preventing an intruder from bypassing security by tampering with the exposed keypad. A simple three-wire connection links the keypad to the controller, and the keypad has a built-in current-limited (750mA) power source for added protection.

    Key Features

    • Split installation — keypad and controller separated for added security
    • Built-in current-limited (750mA) power source for the keypad
    • Simple 3-wire connection between keypad and controller
    • 12–24 VDC auto-adjusting operation
    • User codes/cards: 1,000 for Output #1, 100 each for Output #2 and #3
    • Up to 50 temporary visitor codes (one-time or 1–99 hour limited use)
    • Up to 50 duress codes for Output #1, 10 each for Output #2/#3
    • EEPROM memory protects programming through power loss
    • Illuminated keys; backlight programmable FULL or AUTO
    • Programmable egress input with optional warning alarm and delayed egress
    • Door sensor input for anti-tailgating; interlocking input for mantrap applications with a second keypad

    Specifications

    Operating Voltage 12–24 VDC
    Current Draw (Standby / Total Max) 88mA / 220mA at 12VDC
    Output #1 Form C, 5A@24VDC
    Output #2 Form C, 1A@24VDC
    Output #3 Form C, 1A@24VDC
    Alarm / Key Active / Duress / Interlock Outputs 100mA@24VDC each
    Tamper Output 50mA@24VDC
    Inputs Egress (N.O.), Door sensor (N.C.), Door inhibit (N.O.), Doorbell (N.O.), Tamper (N.C.)
    Proximity Reader Frequency 125kHz (EM125)
    Proximity Reader Sensing Distance 1½″ (38mm)
    Operating Humidity 5–95% non-condensing
    Operating Temperature -4° to 158°F (-20° to 70°C)
    Weight Keypad: 6.3 oz (180g); Controller: 8.8 oz (250g)

    Dimensions

    Keypad: 4⅝″ x 2⅞″ x 1½″ (117 x 73 x 38 mm). Controller: 3-7/16″ x 4¾″ x 1¼″ (87 x 120 x 32 mm).

    Keypad Status Indicators

    Status Sound Amber LED (Center)
    In programming mode — Steady ON
    Successful key entry 1 Beep 1 Flash
    Successful code/card entry 2 Beeps 2 Flashes
    Unsuccessful code/card entry 5 Beeps 5 Flashes
    Power up delay Continuous beeping for 1 min Continuous flashing for 1 min
    Output relay activation 1-sec long beep —
    System restore mode 2 Beeps Fast flashing for 2.5 min
    Keypad link-up with controller failed Continuous beep every 1.5 sec —

    Warranty

    Manufactured by SECO-LARM U.S.A., Inc., 16842 Millikan Avenue, Irvine, CA 92606. Phone: (949) 261-2999 / (800) 662-0800. Refer to SECO-LARM's standard product warranty terms.