Transducer Compatibility Reference
WTI400 v1.2 — In service on the test vessel. This reference applies to the V1.2 hardware as fitted; see the Wind Interface page for the V1.2 limitation that restricts the X / Y amplifier to the Raymarine 8v4 setpoint.
Compiled from primary sources: Raymarine service manuals (ST50 / ST60 / ST60+ / E22078 / E22079), B&G / Navico technical documentation (Network / 213 / 283-496), and Navman design data. Data points marked (confirmed), (estimated), or (⚠ unconfirmed) based on source evidence.
Operating principle
Legacy masthead wind transducers generate two distinct electrical signals to convey wind direction and speed.
Direction encoding uses analog voltage outputs generated by Hall-effect sensors or inductive pickups responding to a rotating vane or magnet. Raymarine and earlier Navman designs use quadrature sinusoidal encoding (sine and cosine outputs from two sensors mounted 90° apart). B&G employs a three-phase synchro-like system with outputs spaced 120° apart. Both architectures leverage the atan2(Y, X) trigonometric identity (or an equivalent phase-shift correction) to reconstruct absolute vane angle from two or three analog channels.
Speed measurement relies on an open-collector pulse train generated by a Hall-effect sensor, reed switch, or opto-interrupter responding to rotation of a three-cup anemometer. The transducer pulls the speed line to 0 V on each pulse; the WTI400 conditions this into a logic-level edge via the 74LVC1G17 Schmitt trigger for interrupt-driven counting.
All transducers covered here share a common supply and ground architecture: a regulated DC rail (typically 6.5–12 V at the connector) powers the internal electronics, while ground and shield connections establish a low-impedance return path. The WTI400's WIND_8V rail (8.30 V or 6.54 V at the connector, selectable via JP1; LP2951 LDO, 100 mA rated) is designed to support this family of legacy devices.
Compatibility summary
| Transducer | Supply Voltage | Direction Type | Direction Signals | Speed PPR | WTI400 Compatibility | Confidence |
|---|---|---|---|---|---|---|
| Raymarine ST50 / early ST60 | 8 V (confirmed) | Quadrature Hall-effect | Blue, Green (2–6 V) | 2 (confirmed) | ✅ Verified | (confirmed) |
| Raymarine ST60+ / E22078 / E22079 | 8 V (confirmed) | Quadrature Hall-effect (Melexis 2SA10) | Blue, Green (2–6 V) | 2 (confirmed) | ✅ Verified | (confirmed) |
| B&G Network (pre-1996) / 213 | 6.5–12 V (confirmed) | Three-phase synchro | Red, Green, Blue (0.2–6.3 V) | 2 (confirmed) | ✅ Verified at supply level (see V1.2 ADC limit below) | (confirmed) |
| B&G Network (post-1996) / 283 / 496 | 6.5–12 V (estimated) | Three-phase synchro | Red, Green, Blue (0.2–6.3 V) | 2 (estimated) | ✅ Likely (see V1.2 ADC limit below) | (estimated) |
| Navman 3150 | 12 V (confirmed) | Quadrature Hall-effect (UGN3503U) | White, Yellow (~0.4–1.0 V) | 3 (⚠ unconfirmed) | ⚠ Marginal — bench test required | (⚠ unconfirmed) |
| Raymarine RotaVecta™ | — | Resolver / synchronous demodulation | — | — | ❌ Not compatible | (confirmed) |
The WTI400 V1.2 op-amp bias network is referenced to VCC, not to WIND_8V, so the amplifier is centred only at JP1 8v4 (8.65 V VAS). At JP1 6v8 the X / Y amplifier output clips below 2.62 V — direction reconstruction fails. V1.2 supports the Raymarine 8 V family only. B&G and other 6.5 V transducers will be supported in V2.0 once the bias divider is tied to WIND_8V. See the Wind Interface page for the full analysis.
Transducer detail sheets
Raymarine ST50 and early ST60 masthead wind transducer
Supply voltage and current:
- Nominal supply: 8 V (confirmed) at RED connector pin
- Supply current: not directly stated in service documentation; estimated <25 mA (estimated) based on two Hall-effect sensors and passive filtering
- Return path: BLACK shield at pin 1
Direction signal encoding:
- Sensor type: two Honeywell Hall-effect sensors (confirmed), mounted 90° apart on the internal bearing assembly
- Signal path: quadrature sinusoidal (sine / cosine)
- Connector pins: pin 3 GREEN (starboard), pin 4 BLUE (port)
- Voltage range: 2–6 V (confirmed) with mid-supply bias at 4 V
- Firmware angle reconstruction:
θ = atan2(BLUE_ADC, GREEN_ADC) - Alignment: forward (0° / 360°) → Green ≈ 4 V, Blue ≈ 4 V; 90° starboard → Green 6 V, Blue 2 V; 180° aft → Green 2 V, Blue 6 V; 270° port → Green ≈ 4 V, Blue ≈ 4 V (sine / cosine relationship verified in service-manual test tables)
Wind speed signal:
- Transducer type: opto-interrupter (confirmed) with 3-cup anemometer rotor
- Signal path: open-collector switching to ground
- Connector pin: pin 5 YELLOW
- Pulses per rotation: 2 (confirmed) via service-manual test procedure (Yellow switches 8 V to 3.2 V twice per slow rotation)
- Pulse width: typically 40–60 ms per pulse cycle depending on wind speed
Connector type and pin-out:
-
Connector: 5-pin circular masthead connector (confirmed) — manufacturer not specified in available documentation
-
Pin configuration (rear view of plug):
Pin Wire Function 1 BLACK 0 V shield / ground return 2 RED +8 V supply (was +12 V on earlier Autohelm; 8 V confirmed on ST60 test docs) 3 GREEN Wind angle (starboard / Y-channel, 2–6 V sine) 4 BLUE Wind angle (port / X-channel, 2–6 V cosine) 5 YELLOW Wind speed pulse (0–5 V open-collector)
WTI400 compatibility:
- ✅ Supply voltage: WTI400 provides 8 V nominal at WIND_8V (8.30 V after D17 drop)
- ✅ Direction signals: quadrature encoding matches WTI400's atan2 firmware model
- ✅ Direction voltage swing: 2–6 V at the transducer fits within the WTI400 op-amp transfer (V_out = V_signal × 1.054 − 2.76 V at JP1 8v4)
- ✅ Speed pulse: open-collector opto-interrupter compatible with U11 74LVC1G17 Schmitt-trigger conditioning
Known issues and observations:
- Early ST50 and Autohelm transducers are electrically identical to ST60; pin 2 (RED) may be labelled "+12 V" on older connector sleeves but actual supply on newer vessels is 8 V
- Bearing replacement specified: S693ZZ 3×8×4 mm ABEC-5 ceramic ball bearings with 1-018 O-ring
Sources:
- Raymarine ST50 Wind Transducer Service Manual
- Raymarine ST60 Wind Tests (pin assignment and voltage tables)
- Raymarine ST60 Wind Vane (new) Service Manual — E22078 / E22079 test data confirming 2 PPR
Raymarine ST60+ / E22078 / E22079 masthead wind transducer
Supply voltage and current:
- Nominal supply: 8 V (confirmed) at RED connector pin; the transducer internally regulates to 5 V
- Supply current (full transducer): 16–25 mA (estimated) per service documentation
- Melexis 2SA10 dual-axis Hall sensor: 16–18 mA typical
- TL914 dual op-amp buffers + passive conditioning: ~5–7 mA estimated
- Opto-interrupter anemometer: negligible average current (transient pulses only)
- Return path: BLACK shield at pin 1
Direction signal encoding:
- Sensor type: Melexis Sentron 2SA10 integrated dual-axis Hall-effect (confirmed) in SOIC-8
- Signal path: quadrature sinusoidal (X and Y representing sin / cos of magnet angle)
- Internal sensor supply: 5 V regulated on-board
- Sensor output characteristics:
- Ratiometric: 5 %–95 % of supply (0.25–4.75 V on the 5 V rail)
- Common reference output (CO_OUT): VSUP / 2 = 2.5 V
- Phase matching X–Y: ±0.3° typical
- Magnetic sensitivity: 40–60 V/T
- Connector pins: pin 3 GREEN (Y-channel), pin 4 BLUE (X-channel)
- Voltage range at the transducer output: 2–6 V (confirmed) — the internal TL914 op-amp buffers re-bias the 5 V sensor output to the 8 V rail midpoint (4 V) for transmission down the mast cable
- Firmware angle reconstruction:
θ = atan2(BLUE_ADC, GREEN_ADC)(identical to ST50 / ST60) - Alignment: same as ST50 / ST60
Wind speed signal:
- Transducer type: opto-interrupter (confirmed) with 3-cup anemometer rotor (same mechanical design as ST50 / ST60)
- Signal path: open-collector switching to ground via internal opto-transistor
- Connector pin: pin 5 YELLOW
- Pulses per rotation: 2 (confirmed)
Connector type and pin-out: identical to ST50 / ST60 (confirmed).
WTI400 compatibility: ✅ fully compatible (confirmed).
- Supply voltage: 8 V nominal matches WTI400 WIND_8V rail
- Current draw: <25 mA, well within WTI400's 100 mA LDO budget
- Direction signals, encoding, and speed pulse mechanism: identical to ST50 / ST60
Known issues and observations:
- Melexis 2SA10 requires specific PCB layout and magnet orientation for accurate operation (documented in Melexis datasheet)
- TL914 dual op-amps provide local power conditioning and signal buffering; replacement transducers must include these components
- Spare PCB assembly part number: A28004 (documented in ST60+ Supplement)
Sources:
- Melexis Sentron 2SA10 Dual-Axis Hall Effect Sensor datasheet
- Raymarine ST60+ Supplement 84200_1
- Raymarine ST60 Wind Vane (new) Service Manual
B&G Network masthead transducer (pre-1996 / post-1996 / 213 variant)
Supply voltage and current:
- Nominal supply: 12 V (confirmed) on pre-1996 Network 6-pin connector; 6.5 V (confirmed) on 213 variant and post-1996 7-pin Network
- Supply current (Network 213): 25–30 mA (estimated) under normal operation
- Current draw verified stable at 8 V WTI400 supply with no signal distortion or thermal issues
- Return path: BLACK at pin 1
Direction signal encoding:
- Sensor type: magnetic coupling of wind-vane shaft to an inductive antenna or Hall-effect sensors (exact technology not documented in available service manuals; inferred from three-phase output characteristics)
- Signal path: three-phase synchro-like system with 120° phase offsets
- Connector pins (Network 6-pin pre-1996): pin 4 GREEN, pin 5 RED, pin 6 BLUE
- Connector pins (B&G 213 8-pin DIN): pin 5 BLUE (phase B), pin 6 RED (phase R), pin 7 GREEN (phase G)
- Voltage range per phase: 0.19–6.28 V (confirmed) across cardinal vane positions (0°, 90°, 180°, 270°)
- Signal characteristics (GREEN, phase G):
- 0° forward → 3.18 V
- 90° starboard → 6.28 V (peak)
- 180° aft → 3.18 V
- 270° port → 0.19 V (minimum)
- Sinusoidal sweep across all three phases with 120° offsets
- Firmware angle reconstruction:
θ = atan2(BLUE_ADC, GREEN_ADC) + offset, where offset is the phase-shift correction (~0°–60° depending on initial alignment). WTI400 uses GREEN (phase G) as Y, BLUE (phase B) as X.
Wind speed signal:
- Transducer type: reed switch or Hall-effect (type not explicitly documented (⚠ unconfirmed)), likely switched by magnet(s) on the rotating anemometer hub
- Signal path: open-collector switching to ground (same as Raymarine)
- Connector pin (Network 6-pin): pin 3 VIOLET
- Connector pin (B&G 213 8-pin DIN): pin 4 VIOLET
- Pulses per rotation: 2 (confirmed) per B&G test procedures
Connector type and pin-out:
Network 6-pin DIN (pre-March 1996):
| Pin | Wire | Function |
|---|---|---|
| 1 | BLACK | 0 V / ground |
| 2 | ORANGE | +12 V supply |
| 3 | VIOLET | Wind speed pulse |
| 4 | GREEN | Wind angle phase G (Y-channel) |
| 5 | RED | Wind angle phase R (unused on WTI400) |
| 6 | BLUE | Wind angle phase B (X-channel) |
Network 7-pin DIN (March 1996 onwards): pins 1–6 same as 6-pin; pin 7 GREEN (redundant phase).
B&G 213 8-pin DIN:
| Pin | Wire | Function |
|---|---|---|
| 1 | BLACK | 0 V / ground |
| 2 | ORANGE | +6.5 V supply |
| 3 | (screen) | Cable shield |
| 4 | VIOLET | Wind speed pulse |
| 5 | BLUE | Wind angle phase B (X-channel) |
| 6 | RED | Wind angle phase R (unused) |
| 7 | GREEN | Wind angle phase G (Y-channel) |
| 8 | — | N/C |
B&G 283 / 496 masthead (6-pin DIN):
| Pin | Wire | Function |
|---|---|---|
| 1 | VIOLET | Wind speed pulse |
| 2 | ORANGE | +12 V supply |
| 3 | BLUE | Wind angle phase B (X-channel) |
| 4 | GREEN | Wind angle phase G (Y-channel) |
| 5 | RED | Wind angle phase R (unused) |
| 6 | BLACK | 0 V |
WTI400 compatibility:
- ✅ Supply voltage (rail level): B&G 213 verified to operate stably at 8 V WTI400 supply; post-1996 units estimated to handle 8 V as well
- ⚠ V1.2 ADC limit: see the caution box at the top of this page — V1.2 supports only the Raymarine 8v4 setpoint at the ADC stage. JP1 6v8 produces the correct B&G supply but the X / Y amplifier output is not usable. V2.0 fix in progress.
- ✅ Direction signals: three-phase synchro principle supports atan2 reconstruction from two channels (GREEN / Y and BLUE / X); the third phase is unused
- ✅ Direction voltage swing: 0.19–6.28 V at the transducer fits within the WTI400 op-amp transfer at the appropriate setpoint
- ✅ Speed pulse: open-collector architecture compatible with U11 conditioning
Wiring matrix for the WTI400 (post-March 1996 and 213 devices):
| B&G wire function | B&G colour | Connect to WTI400 tab | WTI400 label | Signal path |
|---|---|---|---|---|
| Wind angle phase G | GREEN | J7 | Y | → WIND_Y (ADC) |
| Wind angle phase B | BLUE | J6 | X | → WIND_X (ADC) |
| Wind angle phase R | RED | — | — | Unused (3rd phase not required) |
| Wind speed pulse | VIOLET | J8 | P | → WIND_SPD (Schmitt) |
| 0 V / ground | BLACK | J9 | GND_WIND | GND return via FL2 to GNDREF |
| +6.5–12 V supply | ORANGE | J5 | WIND_8V | → LP2951 LDO via D17 |
Known issues and observations:
- Pre-March 1996 transducers use a variety of colour assignments across different B&G product lines; service documentation must be consulted for older installations
- Adapter cables (DIN-to-WTI400-tab) required for installation on Keystone 1211 breakouts (V1.2). V1.3 moves to a single M12 6-pin socket — see the V1.3 backlog
- Three-phase synchro outputs may exhibit small DC offsets; atan2 firmware naturally compensates
Sources:
- B&G Masthead Transducer Manual — Network 6-pin and 7-pin connector specifications, voltage test tables
- B&G Masthead Transducer Manual — 213 variant pin assignments and voltage measurements
- Scadys wind research documentation — B&G 213 verification at 8 V, estimated current draw
Navman 3150 masthead unit
Bench verification required before deployment. A Navman 3150 unit was recovered on 2026-05-08 and is available for testing; the measurements listed under Gaps and open actions below must be completed before this transducer is considered supported.
Supply voltage and current:
- Nominal supply: 12 V (confirmed) at RED connector pin
- Supply current: not documented; estimated <100 mA (estimated) based on two UGN3503U Hall sensors and passive dividers
- WTI400 supply concern: ⚠ marginal (unconfirmed) — transducer is designed for 12 V; WTI400 provides 8 V nominal (8.30 V at the connector after D17). The internal 78L05 regulator requires a minimum input of ~7 V (Vout + 2 V dropout); 8 V leaves minimal headroom under full load.
- Return path: BLK at pin 2
Direction signal encoding:
- Sensor type: two Allegro UGN3503U linear Hall-effect sensors (confirmed), mounted 90° apart on the internal bearing assembly
- Signal path: quadrature sinusoidal (same principle as Raymarine ST50 / ST60)
- Internal sensor supply: 5 V regulated (confirmed) from internal 78L05 regulator powered via BAV99-protected 12 V rail
- Connector pins: pin 4 WHT (channel 1), pin 5 YEL (channel 2)
- Voltage range at the transducer output: ~0.4–1.0 V (estimated) per hand-drawn schematic analysis — significantly attenuated vs. Raymarine's 2–6 V swing due to a heavy output divider on the direction board (4.7 kΩ pull-up + ~120 kΩ / 22 kΩ divider, exact values to confirm). WTI400 ADC swing after signal conditioning will be small; may require firmware gain compensation or an input-divider modification.
- Firmware angle reconstruction:
θ = atan2(YEL_ADC, WHT_ADC) - Alignment: not documented; assume 90° quadrature offset (to confirm via bench test)
Wind speed signal:
- Transducer type: Hall-effect (likely UGN3503 or UGN3505 variant (⚠ unconfirmed)) sensing rotating magnet(s) in the 3-cup anemometer
- Powered from: 12 V supply directly (confirmed) via BAV99 steering diode; not from the 5 V regulator
- Signal path: open-collector switching to ground
- Output conditioning: 4.7 kΩ + 2.2 kΩ resistor divider before transmission
- Connector pin: pin 3 BLUE
- Pulses per rotation: ⚠ likely 3 (unconfirmed) — single Hall sensor + single magnet with a 3-cup anemometer suggests either 1 PPR (magnet in fixed central hub) or 3 PPR (magnet on each cup). Requires bench verification.
Connector type and pin-out:
- Connector: 5-pin circular connector (confirmed) — manufacturer / series not identified
| Pin | Wire | Function |
|---|---|---|
| 1 | RED | +12 V supply input |
| 2 | BLK | GND (common return) |
| 3 | BLUE | Wind speed pulse output |
| 4 | WHT | Wind direction channel 1 (quadrature Y) |
| 5 | YEL | Wind direction channel 2 (quadrature X, 90° offset) |
WTI400 compatibility assessment:
| Aspect | Status | Assessment |
|---|---|---|
| Supply voltage | ⚠ Marginal | 12 V design; WTI400 provides 8 V at the connector. 78L05 dropout pushes minimum to ~7 V; 8 V is marginal under load. Mitigation: increase WTI400 VAS setpoint to 9 V (achievable via LP2951 divider rework), yielding ~8.65 V after D17. |
| Direction encoding | ✅ Plausible | Quadrature Hall-effect; atan2 firmware applies. |
| Direction signal levels | ⚠ Severely attenuated | Output divider reduces 2.5 V sensor mid-supply (on 5 V rail) to ~0.4–1.0 V at WHT / YEL. WTI400 ADC swing will be very small; firmware gain or hardware divider rework may be needed. Bench measurement at 8 V required. |
| Speed pulse mechanism | ✅ Plausible | Hall-effect open-collector should condition through U11 Schmitt trigger. |
| Speed PPR | ⚠ Unconfirmed | 1, 2, or 3 PPR depending on magnet placement. Requires bench measurement at a known rotation rate. |
| Speed sensor supply | ⚠ Concern | 12 V → 8 V supply change may stress the speed sensor if it is UGN3503U (datasheet max 8 V absolute). Higher-voltage variants exist; bench test recommended. |
Overall: electrically plausible for WTI400 integration but comprehensive bench verification is required before deployment. The primary unknown is the direction-signal swing at the WTI400 ADC after the transducer's heavy output divider — actual measurement may demand firmware gain adjustment or hardware modification.
Known issues and observations:
- Navman was acquired by Navico (parent of B&G, Simrad, Lowrance); no continuing support from Navman directly
- Hand-drawn schematic sourced from a Sailing Anarchy forum thread; reliability of resistor values not independently verified — confirm on bench
- Output-divider values reported as ~120 kΩ and 22 kΩ with notes flagging the topology as to-be-confirmed
- No service manual available; all internal architecture inferred from schematic tracing and component identification
Sources:
- Navman 3150 Masthead Unit — Technical Reference (internal markdown with hand-drawn schematic tracing, dated 8/6/2012)
- Sailing Anarchy forum post #138162 ("Navman 3150 masthead unit repair") — schematic source
Incompatible transducers
Raymarine RotaVecta™ transducers are not compatible with the WTI400. These units employ a fundamentally different electrical interface based on continuous resolver-type outputs with dedicated synchronous demodulation requirements — not the open-collector speed pulse and quadrature Hall-effect analog direction signals supported by the WTI400. Attempting to connect a RotaVecta to the WTI400 will not damage the device but will not yield usable wind direction or speed data.
Gaps and open actions
Priority 1 — bench test the Navman 3150 unit
A Navman 3150 unit is available for testing. The following measurements are critical before considering Navman 3150 integration:
- Supply voltage stability at 8 V — connect the unit to a bench supply at 8 V (WTI400 nominal) and 12 V (design target) in parallel with a 100 Ω shunt. Measure current at rest (no rotation) and under slow anemometer rotation. Confirm 78L05 regulator output is stable at 5 V ±5 % at both supply voltages. Record supply voltage and current at both test points.
- Direction signal swing at WTI400 ADC — manually rotate the vane through 360° while powered from 8 V. Measure WHT (channel 1) and YEL (channel 2) at cardinal positions (0°, 90°, 180°, 270°) and quadrant midpoints. Record min / max swing for both channels. Compare to the estimated 0.4–1.0 V range. Assess SNR and whether firmware gain scaling is adequate or a hardware modification is required.
- Speed signal characteristics at 8 V — rotate the anemometer at known rates (5, 10, 20 RPM). Record BLUE pin voltage at rest and during rotation. Count pulses per full rotation at multiple speeds. Determine PPR. Measure pulse width and duty cycle.
- Long-term stability — leave the unit powered at 8 V for 30 minutes; check for thermal issues or signal drift. Repeat measurements 1–3 post-equilibrium.
Priority 2 — confirm Raymarine ST60 / E22078 / E22079 PPR (resolved)
Resolved (confirmed). Service manual test procedure for ST60 Wind Vane (new) explicitly documents Yellow switching from 8 V to 3.2 V and back twice per slow rotation. Verified: 2 PPR.
Priority 3 — confirm B&G speed PPR (resolved)
Resolved (confirmed). B&G Masthead Transducer Manual specifies a 2 PPR open-collector output. Verified: 2 PPR.
Priority 4 — identify the Navman 3150 speed-board Hall sensor
The speed board Hall-effect sensor part number is unreadable on the available schematic. If the original Navman 3150 unit is bench-tested:
- Photograph or read the part marking on IC U3 (speed-board Hall sensor)
- Cross-reference with Allegro or Honeywell Hall-effect datasheets to confirm maximum supply voltage rating
- Assess whether 8 V operation is within safe limits (UGN3503U max 8 V; UGN3505 or similar max 12+ V)
Priority 5 — pre-March-1996 B&G colour assignments (historical reference)
Pre-1996 B&G transducers exhibit variable colour assignments across product lines. Comprehensive pre-1996 compatibility requires access to unit-specific service documentation. For vessels with undocumented pre-1996 B&G transducers:
- Obtain original installation records or service manual for the specific vessel
- Failing that, measure voltage on all output pins at cardinal vane positions to infer phase assignments
- Cross-reference with B&G Masthead Transducer Manual voltage tables
Priority 6 — Navman 3150 output divider exact values
Hand-drawn schematic reports direction-output dividers as ~120 kΩ and 22 kΩ with the topology flagged as to-be-confirmed. If the unit is bench-tested:
- Visual inspection of the PCB (if readable)
- Resistance measurement with a multimeter between divider nodes
- Cross-reference with a higher-resolution schematic scan
Priority 7 — Navman 3150 connector type
The 5-pin circular connector manufacturer / series is not identified. For cable-adapter design:
- Obtain the original connector part number or cross-reference from Navman documentation
- Mechanical dimensions and mating pin type (solder cup, crimp, etc.)
- Failing that, measure connector OD and pin spacing on the recovered unit
Confidence summary
| Category | (confirmed) | (estimated) | (⚠ unconfirmed) |
|---|---|---|---|
| Raymarine ST50 / ST60 | Supply voltage, pin-out, direction encoding, speed PPR (2), direction swing (2–6 V), connector type | Supply current (<25 mA) | — |
| Raymarine E22078 / E22079 | Sensor type (Melexis 2SA10), pin-out, direction encoding, speed PPR (2), connector type | Supply current (16–25 mA), TL914 op-amp current | — |
| B&G Network / 213 / 283-496 | Pin-out, direction swing (0.19–6.28 V), speed PPR (2), three-phase encoding, 8 V WTI400 supply (213 verified) | Supply current (25–30 mA), post-1996 supply voltage, post-1996 speed PPR | Pre-1996 colour assignments |
| Navman 3150 | Supply voltage (12 V design), connector pin-out, direction sensor (UGN3503U), encoding (quadrature) | Direction attenuation (~0.4–1.0 V), plausibility at 8 V | Speed PPR, exact divider values, speed sensor part, connector manufacturer, swing at 8 V, long-term stability |
References
- Raymarine
- ST50 Wind Transducer Service Manual
- ST60 Wind Tests (voltage tables and pin configuration)
- ST60+ Supplement 84200_1
- ST60 Wind Vane (new) Service Manual (E22078 / E22079 testing procedures, confirmed 2 PPR)
- Melexis Sentron 2SA10 Dual-Axis Hall Effect Sensor datasheet
- B&G / Navico
- B&G Masthead Transducer Manual (Network 6-pin and 7-pin pin-outs, 213 variant specifications, voltage measurement tables, wind-speed pulse characteristics)
- Navman
- Navman 3150 Masthead Unit — Technical Reference (hand-drawn schematic analysis, internal architecture, component identification)
- Sailing Anarchy forum post #138162 — "Navman 3150 masthead unit repair"
- WTI400
- Wind Interface — circuit-level documentation, JP1 setpoints, X / Y amplifier transfer function, V1.2 ADC limitation