Taco SR503-EXP-4 3 Zone Expandable Switching Relay with Priority & 3 Powerpoints

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Taco SR503-EXP-4 3 Zone Expandable Switching Relay with Priority & 3 Powerpoints.

Whether you want to expand up to 20 zones or utilize the advanced features of the PowerPort Cards and Add-on Power Controls, Taco -EXP controls allow for simple integration of advanced features. Plug in any combination of cards and controls to optimize the operation of any system.

Product Features:

• External Indicator Lights
• Switchable Priority
• Simplified Wiring
• Fully Enclosed Snap-Out Relays
• Compact Design
• Fuse Protected
• 100% Factory Tested
• Isolated End Switch
• Contractor Friendly PC Board Layout
• Universal Thermostat Compatibility
• UL and CSA Approved
• 24 Volt Power Input or Output Terminal
• Extended 3 Year Warranty
• Made in the USA
• Plug-in PowerPort Card Slots
• Add-on Power Control Plug
• Expandable to 20 Zones
• Interface with -EXP Zone Valve Controls
• SKU: SR503-EXP-4

Product Specs:

• Specification Sheet
• Installation Sheet