SR504-4 Switching Relay，SR-504-4，4 Channel Relay Module

Key features

• Switchable PrioritySR504-4 Switching Relay, compatible with Taco switching relay. It features diagnostic lights, fuse-protected outputs, sealed relays, simplified wiring and switchable priority for stable and flexible operation
• Wide Application & Stable Sealed RelaysThis 4 zone switching relay fits most household hydronic systems and provides a reliable alternative to Taco relays. Stable sealed relays ensure consistent performance
• Flexible High & Low Level TriggerSR504-4 Supports both High-Level and Low-Level trigger modes via a configurable jumper for each relay
• User-Friendly & Safe DesignFeatures clear screw terminals for secure AC/DC wiring, a transparent cover for safety, and status LEDs for each channel (power and relay engagement）
• Reliable Quality & WarrantyRigorously tested with 6-month warranty and free return & replacement service for reliable performance and customer support

Free shipping included. 30-day hassle-free returns.