Add network-controlled relay switching and sensor monitoring to any installation — the Viking RC-4A is a 4-relay network controller that lets you activate door strikes, gates, locks, and other equipment from anywhere on the network, or use it as a secure remote relay for Viking VoIP entry phones. Each of the four relays can be configured as a toggle or a timed closure from 1 to 99 seconds — ideal for door strikes, cameras, lighting, or any device that needs a momentary or sustained contact. Four sensor inputs monitor external states and trigger email or text message notifications when they change — useful for door contact monitoring, temperature alerts, or tamper detection. A ready-to-use web interface provides direct browser-based control with encrypted login and two access levels: Administrator (full access) and Guest (programmable limits). Remote interaction lets sensor changes on one RC-4A trigger relay activation on a second RC-4A across the network — enabling coordinated cross-site automation. Our Expert Take: The RC-4A is particularly powerful as a secure remote relay controller for Viking VoIP entry phones — it extends relay control well beyond the phone's onboard contacts, enabling complex access control scenarios across multiple entry points. It's also a standalone automation controller for smaller facilities that need network-managed switching without a full access control platform. Key Features 4 independent SPDT relay contacts — toggle or timed (1–99 seconds) 4 sensor inputs with email or text notification on state change Ready-to-use web interface for browser-based control Encrypted login; two access levels (Administrator and Guest) Secure remote relay for Viking VoIP series phones Cross-unit remote interaction: sensor on one RC-4A triggers relay on another Terminal strip connections for all relays and sensor inputs Network connected; programmable relay names and input names Technical Specifications Relays: 4 SPDT; toggle or timed (1–99 seconds) Sensor Inputs: 4 Notifications: Email and text message Interface: Encrypted web browser control Access Levels: Administrator and Guest
