Featured In
Signal SD-S Series Lightning Protection Modules for SDS Two-Wire Irrigation Controllers – SD-SP / SD-SA / SD-GR
by Signal
SKU SD-SP
Original price
$252.15
-
Original price
$252.15
Original price
$252.15
$252.15
-
$252.15
Current price
$252.15
📢 For orders over $100, FREE Shipping Australia-wide
The Signal SD-S Series Lightning Protection Modules provide a coordinated surge protection system for Signal SDS Series Two-Wire Irrigation Controllers and connected field devices. Designed to protect controller electronics, DataCoils™, decoders, and other equipment from electrical surges caused by nearby lightning strikes or power disturbances, the system combines controller-level protection, field surge suppression, and dedicated grounding hardware. The range includes the SD-SP Surge Protector for installation at the controller, the SD-SA Surge Arrestor for protection along extended two-wire paths, and the SD-GR Grounding Rod Kit for establishing a suitable earth connection.
Suitable Applications
- Signal SDS-50 and SDS-100 two-wire irrigation systems
- Commercial landscape irrigation installations
- Agricultural and farm irrigation systems
- Sports fields and turf irrigation networks
- Municipal parks and public landscape systems
- Long-distance two-wire irrigation networks
- Sites exposed to lightning or electrical surge risk
- Protection of controllers, DataCoils™, field devices, and two-wire cabling
- New SDS installations requiring compliant surge and grounding protection
- Existing SDS systems requiring additional field surge suppression
Key Specifications
| Product Name | Signal SD-S Series Lightning Protection Modules |
| Product Type | Lightning and Electrical Surge Protection System for SDS Two-Wire Irrigation Controllers |
| Compatible Controllers | Signal SDS-50 and SDS-100 |
| Available Modules | SD-SP Surge Protector, SD-SA Surge Arrestor, and SD-GR Grounding Rod Kit |
| Primary Application | Protection of SDS Controllers, Two-Wire Paths, and Connected Field Devices from Electrical Surges |
| SD-SP Function | Controller-Level Surge Protection and Grounding |
| SD-SP Installation Location | At the Irrigation Controller, Positioned as Close as Practical to the Earth Stake |
| SD-SP Supply | Included with SDS-50 and SDS-100 Controllers |
| SD-SP Warranty Requirement | Required for Applicable SDS System Warranty Compliance |
| SD-SA Function | In-Field Surge Suppression for the Two-Wire Network |
| SD-SA Recommended Spacing | Approximately Every 300–400 m or Every 16 Valves Along the Two-Wire Path |
| SD-GR Function | Grounding Rod Kit for SD-SP and SD-SA Installations |
| Recommended Ground Rod Length | Minimum 2 m |
| Ground Resistance Requirement | ≤10 Ohms |
| Grounding Cable | Flat Braided Grounding Cable Recommended |
| Connection Method | Approved Waterproof Two-Wire Connectors |
| Typical Field Installation | Valve Boxes or Accessible Service Pits |
Available Variants
| SD-SP | Surge Protector installed at the controller to help protect controller electronics and the power input from electrical surges. It must be connected to a suitable earth stake. |
| SD-SA | Field Surge Arrestor installed along the two-wire path to provide additional surge suppression for DataCoils™, field devices, and extended irrigation cabling. |
| SD-GR | Grounding Rod Kit designed to provide a suitable grounding point for SD-SP and SD-SA installations, with a minimum 2 m rod recommended. |
Features
- Provides coordinated lightning and electrical surge protection for Signal SDS two-wire irrigation systems
- Protects both controller electronics and connected field equipment
- SD-SP controller surge protector is supplied with SDS-50 and SDS-100 controllers
- SD-SP installation is required for applicable SDS system warranty protection
- SD-SA field surge arrestors provide additional protection along extended two-wire networks
- Recommended SD-SA spacing is approximately every 300–400 metres or every 16 valves
- Helps protect DataCoils™, field devices, and two-wire cabling against surge events
- SD-GR Grounding Rod Kit provides a dedicated grounding solution for compatible protection modules
- System requires a ground resistance of 10 Ohms or less for effective protection
- Flat braided grounding cable is recommended to provide a low-impedance connection to earth
- Approved waterproof connectors are required for field connections to SD-SA modules
- Field arrestors can be installed in valve boxes or accessible service pits for inspection and maintenance
- Modular design allows additional field protection to be added as the irrigation network expands
Installation Guidelines
- Install the SD-SP surge protector at the irrigation controller and position it as close as practical to the grounding stake.
- Connect the SD-SP to a correctly installed earth system using suitable flat braided grounding cable.
- Install SD-SA surge arrestors approximately every 300–400 metres or after approximately 16 valves along the two-wire network.
- Use approved waterproof two-wire connectors when connecting SD-SA units in field locations.
- Install field surge arrestors inside valve boxes or accessible service pits where they can be inspected and serviced.
- Use the SD-GR or another suitable grounding system capable of achieving an earth resistance of 10 Ohms or less.
- A minimum 2 m grounding rod is recommended where site conditions allow.
Benefits
- Controller Protection: The SD-SP helps protect valuable SDS controller electronics and power circuits from damaging electrical surges.
- Field Device Protection: SD-SA modules extend surge suppression into the two-wire network to help protect DataCoils™, wiring, and connected devices.
- Reduced Damage Risk: Properly installed surge and grounding protection can reduce the likelihood of widespread irrigation system damage following nearby lightning activity or power anomalies.
- Scalable Protection: Additional field surge arrestors can be installed as the two-wire network becomes longer or additional valves are added.
- Improved System Reliability: Distributed surge protection helps improve the resilience of large commercial and agricultural two-wire irrigation installations.
- Warranty Compliance: Correct installation of the required SD-SP protection helps satisfy applicable SDS system warranty requirements.