Viking Secure Relay Controller - SRC-1

Viking Electronics SRC-1 Secure Relay Controller

The Viking SRC-1 is a compact door entry and access control relay controller designed for installations where you need keyless entry, door strike control, and optional phone system integration — all without a dedicated access control server or panel. The SRC-1 supports up to 32 programmable entry codes (1 to 6 digits each), making it a practical fit for small commercial buildings, multi-tenant vestibules, and utility access points where badge readers or biometric systems are cost-prohibitive or logistically impractical.

Overview

At its core, the SRC-1 handles two distinct jobs: relay-controlled door strike or gate release, and optional call-out to an analog phone line, analog port on a VoIP system, or traditional PBX. That dual-mode design means you can deploy it in a building already wired for telephone entry — no new network drops required — or run it entirely standalone without any phone system involvement. The form factor is wall-mount-ready, measuring 5.5" × 4.5" × 1.5" and weighing 1.5 lbs, so it fits inside a standard surface-mount box or directly on a wall near a door frame.

Key Features

• 32 programmable keyless entry codes: Each code can be 1 to 6 digits, giving you flexibility to assign short codes for frequent users or longer codes for higher-security zones. Managing 32 independent codes is enough for most single-door commercial applications — a small office, parking garage pedestrian gate, or server room — without requiring software or a networked panel.
• 5A relay contact rating (30V DC / 250V AC): The SRC-1's relay handles up to 5 amps at both 30V DC and 250V AC, which covers the vast majority of electric door strikes, magnetic locks, and gate controllers on the market. You won't need an external relay booster for standard door hardware — wire directly to your strike or lock power supply.
• Wide input voltage range — 12 to 24V AC or DC: Accepts virtually any low-voltage power source already present at the door location, whether that's an existing 12V DC transformer, a 24V AC access control power supply, or a 24V DC supply. A 12V DC adapter is included, so the unit is ready to power up out of the box.
• 32V DC talk battery output: For installations integrated with analog door phone handsets or intercom stations, the SRC-1 provides 32V DC talk battery to drive the audio circuit. This eliminates the need for a separate talk battery power supply — a genuine wiring simplification in retrofit telephone-entry deployments.
• Standalone or phone-integrated operation: Deploy the SRC-1 independently as a pure keypad-entry relay controller, or integrate it with an analog POTS line, an analog FXS port on a VoIP gateway, or a standard PBX analog extension. This makes it compatible with a broad range of existing phone infrastructure without requiring SIP configuration or IP networking.
• Wide operating temperature: -30°F to 150°F: The SRC-1 is rated for a temperature range that covers unheated mechanical rooms, parking structures, and outdoor-adjacent entry vestibules in most North American climates. That range significantly expands deployment options compared to controllers limited to standard office-temperature bands.
• Compact wall-mount enclosure: At 5.5" × 4.5" × 1.5", the SRC-1 fits on a standard single-gang or double-gang backbox and won't compete for space in tight electrical closets. Installation requires only low-voltage wiring skills — no specialty tools or conduit work for the control unit itself.

Integration & Compatibility

The SRC-1 (sometimes searched as SRC 1) is designed for integration with analog telephone infrastructure — specifically analog POTS lines, analog ports on VoIP systems, or analog extensions from traditional or hosted PBX platforms. This makes it particularly useful in older commercial buildings where analog wiring is already in place and replacing it with IP infrastructure would be costly.

For access control, the relay output interfaces directly with electric strikes, electromagnetic locks, and gate operators rated within the 5A contact rating. Viking's Viking Electronics product line includes compatible door phones and intercom stations that pair with the SRC-1's talk battery output for full entry station functionality. If you're specifying a door entry system and need a complete station-plus-controller solution, review the broader access control category for compatible Viking door phones and entry panels.

For new installations, consider your power infrastructure early: the SRC-1 accepts 12–24V AC/DC, so it can share a power supply with a compatible door strike if the current draw permits — review your power supply options to confirm adequate current budget for the strike plus controller. Operating humidity tolerance of 5% to 95% non-condensing means the unit handles typical indoor environments including HVAC rooms and light-industrial spaces, but avoid direct condensation exposure.

Frequently Asked Questions

Q: Can the SRC-1 operate without a phone line connected?

A: Yes. The SRC-1 supports fully standalone operation as a keypad relay controller. The phone line integration is optional — you can use it purely for keypad-based code entry and relay-controlled door strike without connecting any telephone line or PBX port.

Q: How many entry codes does the SRC-1 support, and how long can they be?

A: The SRC-1 supports 32 independent keyless entry codes, each between 1 and 6 digits in length. This allows you to assign different codes to different users or groups without requiring any software or network connection to manage.

Q: What is the relay contact rating on the SRC-1?

A: The relay is rated at 5A at 30V DC or 250V AC maximum. This is sufficient for most standard electric door strikes and magnetic locks. Verify your lock hardware's current draw before wiring — if the strike requires more than 5A, an external relay or power controller will be needed.

Q: What VoIP or PBX systems is the SRC-1 compatible with?

A: The SRC-1 works with any system that provides a standard analog (FXS) port — including analog POTS lines, analog ports on VoIP gateways, and traditional or hosted PBX systems with analog extensions. It does not support SIP or IP-based direct connection.

Q: What power supply does the SRC-1 require?

A: The SRC-1 accepts 12 to 24V AC or DC. A 12V DC adapter is included in the package, so no additional power supply is required for basic deployment. For installations sharing a supply with a door strike, verify that the supply can handle the combined current draw.

Q: What is the warranty on the Viking SRC-1?

A: The SRC-1 carries a two-year limited manufacturer warranty.

James Everett

The SRC-1 is one of those controllers that earns its place by doing a narrow job well. I spec it specifically when a site already has analog phone infrastructure and needs door strike control without adding an IP-networked access control panel — the SRC-1's ability to ride an existing analog FXS port means you're not pulling new Cat6 or commissioning a server. That 32V DC talk battery output is the detail that matters most in retrofit telephone-entry jobs: it drives the door phone audio circuit natively, which eliminates a wiring run that trips up a lot of integrators on older commercial retrofits.

Technical Highlights:

• 5A relay at 30V DC / 250V AC: Covers the contact rating of virtually every standard electric strike and mag-lock in commercial use. Wire directly — no intermediate relay board required for typical hardware.
• 32 codes, 1–6 digits: Enough capacity for most single-door commercial applications. The variable code length lets you tune security posture per user group — short codes for high-frequency access, longer codes for after-hours or secure zones.
• -30°F to 150°F operating range: Broader than most small relay controllers. Handles unheated utility rooms, parking structure interiors, and outdoor-protected vestibules without a heated enclosure — a real cost factor on multi-door retrofit projects.

Deployment Considerations:

• The SRC-1 requires an analog signal path for phone integration — SIP trunks or pure-IP PBX systems without an analog FXS card won't work directly. Confirm an analog port is available before specifying this unit in a VoIP-only environment.
• Watch the operating temperature ceiling on the high end: 150°F means direct outdoor sun exposure in hot climates may push the enclosure temperature close to the limit. Mount in a shaded or interior-facing location on southern exposures in warm regions.

The SRC-1 is the right call for small commercial retrofits — particularly multi-tenant office buildings, light-industrial facilities, or mixed-use properties where analog telephone wiring is already present and adding a networked access control panel isn't justified by the door count or budget.