SD System RelayCube for SDS Series Two Wire Irrigation Controllers

The Signal RelayCube™ is a plug-and-play multi-wire expansion module that enables SDS Series Two-Wire Irrigation Controllers to operate conventional 24VAC solenoid valves. Ideal for retrofitting existing irrigation systems or creating hybrid control setups, the RelayCube™ connects directly to the two-wire network and adds 24 additional station outputs per module.

Each RelayCube™ is powered by its own 24VAC transformer and can be installed anywhere along the two-wire path, offering unmatched flexibility in layout and system design. Up to 2 RelayCubes™ can be connected to an SDS-50 controller, while the SDS-100 supports up to 4, delivering up to 96 extra conventional valve outputs when fully expanded.

The system retains the ability to mix and match DataValves™ (with DataCoils™) and conventional 24VAC solenoids, offering complete control system flexibility. Bright LED indicators provide real-time feedback for power status, communication, valve activity, and short circuit protection — ensuring fast diagnostics and easy field servicing.

FEATURES

• Hybrid System Compatibility – Converts two-wire SDS controllers to support 24VAC solenoids
• Adds 24 Outputs Per Module – Expand control capacity with modular plug-and-play installation
• Flexible Mounting – Install anywhere along the two-wire network
• Dedicated 24VAC Power Supply Required – Operates independently of the controller’s main power
• LED Status Indicators – Displays power, communication, and active valve status
• Short Circuit Protection – Resettable circuit breaker protects field wiring from overload
• SDS-50 & SDS-100 Compatible –
  • SDS-50: Supports up to 2 RelayCubes (48 conventional outputs)
  • SDS-100: Supports up to 4 RelayCubes (96 conventional outputs)
• Addressable Integration – Unused RelayCube addresses can be allocated to DataCoils™ for mixed operation

SPECIFICATIONS

• Product Name: Signal RelayCube™
• Function: Multi-wire expansion for SDS Series controllers
• Valve Outputs per Module: 24 conventional 24VAC solenoids
• Controller Compatibility:
  • SDS-50: Up to 2 RelayCubes
  • SDS-100: Up to 4 RelayCubes
• Mounting: In-line with the two-wire cable; no need for centralised mounting
• Power Requirement: Separate 24VAC power supply (not included)
• Communication: Integrated via SDS two-wire network
• Indicators:
  • Valve operation LEDs
  • Power status LED
  • Communication status LED
  • Fuse reset indicator
• Short Circuit Protection: Resettable circuit breaker
• Construction: Rugged, field-ready enclosure with labeled terminal connections