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    Seco-Larm ENFORCER Wired Single-Channel RF Transmitter (SK-919T1-GBWQ) — Installation Manual

    September 08, 2026 2 min read

    Installation manual for the Seco-Larm ENFORCER Wired Single-Channel RF Transmitter, models SK-919T1-GBWQ and SK-939T1-GBWQ.

    💾 Download Original PDF
    Full text manual (for reference)

    Installation manual for the Seco-Larm ENFORCER Wired Single-Channel RF Transmitter, models SK-919T1-GBWQ (315MHz) and SK-939T1-GBWQ (433.92MHz) — a compact wired transmitter that converts any dry-contact device (push-to-exit plates, photobeam sensors, doorbell buttons, PIR motion sensors, etc.) into a wireless signal.

    Specifications

    Spec SK-919T1-GBWQ SK-939T1-GBWQ
    RF Frequency 315MHz (FCC) 433.92MHz (CE)
    Type 1-Channel Wired RF Transmitter
    Switch wiring Two 6" wires for N.O. contact
    Power wiring Two 6" wires for power input
    Power (battery) 3VDC CR-2032 (included)
    Power (external) 3~13VDC regulated adapter (not included)
    Buttons / Channels 1 / 1
    Possible codes Over 68 billion (6.8×10¹⁰)
    Range Up to 500ft (150m), varies with environment
    Dimensions 1¼" x 2³⁄₁₆" x 5⁄₁₆" (31.5 x 55 x 8mm)

    Compatible with all SECO-LARM SK-series receivers of the same frequency. A logo-free version is also available: SK-919T1-GBWUQ (315MHz) / SK-939T1-GBWUQ (433.92MHz).

    Sample Applications

    • Make any push-to-exit plate wireless (paired with an electromagnetic lock)
    • Convert photobeam sensors with dry contacts into a wireless entry alert (paired with an SL-126Q strobe)
    • Wireless equipment / perimeter security
    • Wireless doorbell / service call button
    • Wireless PIR motion sensing

    Installation

    Power Connection

    The transmitter can run on its factory-installed 3VDC lithium CR-2032 battery, or on an external 3~13VDC regulated adapter (not included). To use an external adapter, connect the red wire (positive) and black wire (negative) of the transmitter to the adapter's output wires — correct polarity is critical.

    • Power input range is 3~13VDC and polarity-sensitive. Exceeding 13VDC or reversing polarity will burn out the unit and void the warranty.
    • Use only "regulated" adapters.
    • If an external adapter is used, the CR-2032 battery serves as backup during a power interruption (remove the battery if using an external inline power-on switch).
    • If using an external power-on switch, remove the battery to disable the built-in button so it can only be triggered via the switch.

    External Switch Connection

    The transmitter can be triggered by its built-in button, an external normally-open (N.O.) switch/contact/sensor only, or by both:

    • Fig. 1 — Built-in button only: Insulate the unused blue wires; connect the red/black wires to the adapter as normal.
    • Fig. 2 — External inline power-on switch: Connect the blue wires to the external switch; the battery must be removed for this configuration.
    • Fig. 3 — External switch plus built-in button: AC adapter is optional; insulate red/black wires if not used.

    Any unused wires must be insulated to avoid a short circuit. Do not let the red wire touch any other wire, or it may burn out the transmitter. (External switch is not included.)

    Regulatory & Warranty

    FCC ID: K4E919T2GDW. Complies with Part 15 of the FCC rules. Warranted against defects in material and workmanship for one year from date of sale; SECO-LARM's obligation is limited to repair or replacement of defective parts.