Large Decoder Interface (LDI) and Small Decoder Interface (SDI)
SiteControl Only
The LDI/SDI Two-Wire Decoder Interface serves as an interface between the Central Controller and Rain Bird field and sensor decoders on the SiteControl System.
- Large Decoder Interface (LDI) and the Small Decoder Interface (SDI) serve as an interface between the central controller and Rain Bird commercial field and sensor decoders
- Rain Bird field and sensor decoders include - FD-101, FD-102, FD-202, FD-401, FD-601, SD-210.
- LDI can interface with up to 500 decoder addresses and can activate up to 1,000 solenoids (specific performance depends on system design – please consult Rain Bird Decoder Design Guide)
- SDI can interface with up to 200 decoder addresses and can activate up to 400 solenoids (specific performance depends on system design – please consult Rain Bird Decoder Design Guide)
- LDI and SDI come standard with terminals for 4 wire paths.
- Up to 200 total pulse and 200 static (switch) sensors can be set up per system with a maximum of 10 sensor decoders per SDI or LDI (specific capacity on SDI or LDI wire paths depends on system design)
- Ground the two wire path at the SDI or LDI decoder interface using a Rain Bird MSP-1 surge protector.
- Ground the two wire path every 500’ using an LSP-1 Line Surge Protector or the LSP-1 that is built into an FD-401 or FD-601 field decoder.
- All LDIs and SDIs shall be grounded to a 10-ohm or less earth ground.
- LDI and SDI are UL and CE listed.
- Flow sensors used in a decoder system do not require the use of a pulse transmitter.
| Model Number | Description |
| Large Decoder Interface (LDI) | |
| LDITURF | LDI North America - interface with up to 500 decoder addresses and can activate up to 1,000 solenoids, includes transformer |
| ILDITURF | LDI International - interface with up to 500 decoder addresses and can activate up to 1,000 solenoids, does not include a transformer |
| Small Decoder Interface (SDI) | |
| SDITURF | SDI North America - interface with up to 200 decoder addresses and can activate up to 400 solenoids, includes transformer |
| ISDITURF | SDI International - interface with up to 200 decoder addresses and can activate up to 400 solenoids, does not include transformers |
| Domestic (USA) Field Decoders, Sensor Decoders and Surge Protection | |
| FD-101TURF | Field Decoder interfacing signal line and individual valve |
| FD-102TURF | Field Decoder interfacing signal line and valve or one pair of valves |
| FD-202TURF | Field Decoder interfacing signal line and 2 valves or 2 pair of valves |
| FD-401TURF | Field Decoder interfacing signal line and up to 4 individual valves |
| FD-601TURF | Field Decoder interfacing signal line and up to 6 individual valves |
| LSP-1TURF | Line Surge Protection |
| MSP-1 | Ground Two-Wire Path at LDI/SDI - Maxi Surge Pipe |
| SD-210TURF | Sensor Decoder interfacing signal line and analog or digital decoders |
| International Field Decoders, Sensor Decoders and Surge Protection | |
| FD-101GOLF | Field Decoder interfacing signal line and individual valve |
| FD-102GOLF | Field Decoder interfacing signal line and valve or one pair of valves |
| FD-202GOLF | Field Decoder interfacing signal line and 2 valves or 2 pair of valves |
| FD-401GOLF | Field Decoder interfacing signal line and up to 4 individual valves |
| FD-601GOLF | Field Decoder interfacing signal line and up to 6 individual valves |
| LSP-1 | Line Surge Protection |
| MSP-1 | Ground Two-Wire Path at LDI/SDI - Maxi Surge Pipe |
| SD-210 | Sensor Decoder interfacing signal line and analog or digital decoders |
LDI Electrical Specifications
- Input: 220, 230, 240VAC ± 10%, 50Hz
- Output: 24VAC @ 3.12A 50Hz
SDI Electrical Specifications
- Input: 220, 230, 240VAC ± 10% @ 0.36A 50Hz
- Output: 24VAC @ 2A 50Hz
LDI & SDI Dimensions
- Width: 9 ½" (24,1 cm)
- Height: 10 ¼" (26 cm)
- Depth: 4 3/8" (11,1 cm)