4.4.4 GPS-50-2 (GPS Speed/Compass Module)¶
Type: GPS Speed Sender / Compass / BIM Module
Model: GPS-50-2
Manufacturer: Dakota Digital
Product Page: GPS Speed/Compass Sender/BIM
Manual: GPS-50-2 Manual
Overview¶
GPS-based speedometer, compass, altimeter, and clock sync module. Eliminates need for transmission speed sensor - works with any transmission, transfer case, or gear ratio.
Mounting: HDPE panel on firewall (behind dashboard)
Power: Via BIM/IO cable from HDX control box (no separate power wiring)
Specifications¶
- Dimensions: 4.75" W × 2.75" D × 1" H
- Speed Range: 0-158 MPH (255 km/h)
- Update Rate: 10 times per second
- Accuracy: ±0.1 MPH (GPS-dependent)
- Output Signals: 4k, 8k, 16k PPM (selectable)
- Signal Types: Sine wave or square wave (configurable)
- Current Draw: TBD (powered via BIM cable)
- Antenna: Integrated omni-directional (optional external antenna available)
- Warranty: 2 years
GPS Antenna¶
Integrated Antenna:
- Built-in omni-directional antenna
- Requires clear sky view for reliable operation
- Mounting: Dash top or windshield area
Optional External Antenna:
- Part Number: 600041
- Use if integrated antenna location has poor sky view
- Extended cable for remote mounting
Critical System - Sky View Required
GPS speedometer is legally required for on-road operation. Ensure antenna has clear view of sky for reliable GPS signal. Obstructions (metal dash, windshield tint, etc.) may degrade signal quality.
Wiring¶
| Connection | Source | Destination | Wire Gauge | Notes |
|---|---|---|---|---|
| Constant | Critical Cabin PDU Slot 4 | GPS-50-2 power | 18 AWG ✓ | BIM CONSTANT power |
| BIM/IO | HDX control box | GPS-50-2 input | Proprietary | Data via daisy-chain |
| GPS Antenna | GPS-50-2 module | Dash/windshield mount | Coax cable | Included antenna cable |
| Outside Temp | GPS-50-2 (optional) | SEN-15-1 probe | Sensor wire | If used instead of BIM-17-2 |
Antenna Routing:
- GPS-50-2 on firewall HDPE panel → antenna cable → dash top or windshield mount
- Route cable through dash for clean installation
- Avoid routing near high-current wires or ignition system
Outstanding Items¶
- Determine GPS antenna mounting location (dash top vs windshield)
- Determine if using SEN-15-1 temp probe with GPS-50-2 or separate BIM-17-2
Related Documentation¶
- Dakota Digital System Overview - Complete system architecture
- Dashboard Cluster - Displays GPS speed and compass data
- BIM-17-2 Compass/Temp - Alternative compass/temp source
- Firewall Ingress - GPS antenna cable routing