SECO-LARM SK-910RD3 / SK-910RD4 — ENFORCER 3- and 4-Channel RF Receivers Installation Manual

Overview

The SECO-LARM ENFORCER 3- and 4-Channel RF Receivers (SK-910RD3, SK-910RD4, and dual-frequency variants SK-910RD3-4, SK-910RD4-4) provide multi-channel receivers with independently controlled output modes for remotely controlling garage doors, lights, motorized gates, lifts, and other devices. They're dual-frequency capable and compatible with all ENFORCER transmitters of the same frequency, including fixed-code and code-hopping CODEBUMP™ variants.

Key Features

• Flexible 10~24 VAC/VDC operating voltage
• Simultaneously receive 315 and 433.92MHz signals with an optional Extended Range Antenna
• Range up to 500ft (150m), or up to 1,000ft (300m) with optional Extended Range Antenna
• Independently programmable channels, up to 60 transmitter button codes per channel
• Pushbutton programming — no jumpers to cut or switches to set
• 5 output modes per channel: timed pulse (0.5~99 sec), timed pulse (1~99 min), toggle, latch, and follow (validity)
• Compatible with all SECO-LARM transmitters of the same frequency

Specifications

*Can simultaneously receive 433.92MHz with optional SK-93ERSD Extended Range Antenna. †Special order. ‡Can simultaneously receive 315MHz with optional SK-91ERSD Extended Range Antenna.

• Memory capacity: 60 codes per channel
• Operating voltage: 10~24 VAC/VDC
• Standby current: 16mA@12VDC, 12mA@24VDC
• Active current: 60mA@12VDC, 50mA@24VDC (both per channel)
• Relay contacts: Form C, 10A@14VDC
• Connectors: Screw terminals, +/-, with NO/NC/COM per relay
• Digital display: 2-digit, 7-segment LED
• Operating humidity: 5~95%, non-condensing
• Operating temperature: 32°~167°F (0°~75°C)
• Dimensions: 4 3/16" x 7/8" x 2 3/8" (107 x 23 x 60 mm)

Installation Notes

• Mount the receiver out of sight, in a location not exposed to weather or moisture, and not surrounded by metal (metal blocks the signal and reduces range).
• An optional Extended Range Antenna can extend range or activate dual frequency. Open the case, plug the antenna cable into the antenna plug, remove the knockout on the back cover, and reinstall the cover.
• SK-910RD3/RD4 (315MHz) can add an SK-93ERSD (433.92MHz) antenna to also receive 433.92MHz, or an SK-91ERSD (315MHz) antenna to extend range to 1,000ft.
• SK-910RD3-4/RD4-4 (433.92MHz) can add an SK-91ERSD (315MHz) antenna to also receive 315MHz, or an SK-93ERSD (433.92MHz) antenna to extend range to 1,000ft.

Programming

Entering Programming Mode

1. Press and hold the selector button for at least 3 seconds. The LED flashes "L1" for channel 1. Press again to switch channels in sequence.
2. After 2 seconds, the display slowly flashes the number of codes stored and enters programming mode.

If no button is pressed within 15 seconds, the receiver exits programming mode.

Learning a New Transmitter Code

With the desired channel selected and the LED still flashing, press the transmitter button once. The display flashes two horizontal bars and exits programming mode. Repeat for additional codes. Each channel can learn up to 60 transmitter button codes; learning a 61st code deletes the earliest-learned code.

Clearing a Channel's Memory

In programming mode, select the channel. While the display flashes the channel number, press and hold the selector button 3 seconds (or until the LED flashes twice) to clear all codes for that channel.

Programming a Channel's Relay Output Mode

• P1 — Timed Pulse (0.5~99 sec, default 1 sec): Relay turns ON for the programmed number of seconds.
• P2 — Toggle: Press once to turn relay ON, press again to turn OFF.
• P3 — Latch: Relay turns ON and stays ON; press the receiver's selector switch once to reset OFF.
• P4 — Follow (Validity): Relay follows the transmitter button — active only while the button is pressed.
• P5 — Timed Pulse (1~99 min): Relay turns ON for the programmed number of minutes.

In programming mode with the channel selected, press the selector button to display the current mode, then press again to cycle through P1–P5. In P1 or P5, press and hold the selector button to change the duration. Wait 15 seconds after the last change for the receiver to exit programming mode automatically.

Sample Applications

Typical N.C. (normally closed) wiring is used for electromagnetic locks; typical N.O. (normally open) wiring is used for electric door strikes. Connect COM/NC or COM/NO per relay to the lock/strike and a 12VDC power supply as shown in the manual's wiring diagrams.

Compliance & Warranty

• FCC ID: K4E951T4. Complies with FCC Part 15 — operation subject to no harmful interference and must accept any interference received.
• Unauthorized changes or modifications not expressly approved could void the user's authority to operate the equipment.
• No changes to the antenna or device are permitted, per FCC RF exposure compliance requirements.
• California Proposition 65: this product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
• Warranty: 1 year from date of sale to the original customer against defects in material and workmanship, limited to repair or replacement at SECO-LARM's option.