How to Choose a CAN Bus Inclinometer? Single-Axis vs Dual-Axis
An inclinometer is the safety lifeline of construction machinery — cranes, aerial work platforms, drilling rigs. A tip-over means damaged equipment at best, injuries at worst. CAN bus inclinometers — strong interference resistance, networkable, pluggable directly into the controller — have become the mainstream choice for modern construction equipment. But how to pick single- vs dual-axis, range and accuracy? Many get it wrong. This guide uses the JGY JGYTS family to explain.
Why CAN Bus Over Analog Output
Traditional inclinometers use 4-20mA or 0-5V analog outputs, with problems:
- Poor noise immunity: Construction sites have brutal EMI; analog signals drift over long runs.
- Not networkable: A controller accepts limited channels; wiring is messy.
- No self-diagnostics: Sensor faults are hard to catch in time.
CAN bus inclinometers transmit digitally with strong noise immunity; the CANopen protocol (DS301/DS406 compliant) allows many devices on one line, remote parameter configuration, and fault codes pushed directly to the controller. This is why leading OEMs (cranes, aerial platforms) have fully shifted to CAN inclinometers.
Single-Axis vs Dual-Axis: The Core Difference
Many assume "dual-axis is better than single-axis." That's a misconception. Single and dual axes are different measurement geometries for different machine types.
| Aspect | JGYTS-2B (Dual-axis, horizontal) | JGYTS-1B (Single-axis, vertical) |
|---|---|---|
| Axes | Pitch + roll (X+Y) | One circumferential angle |
| Range | ±60° | 0°–360° |
| Mount | Horizontal surface | Vertical surface (axis pointing up) |
| Typical machines | Aerial platforms, scissor lifts, crane bases | Rotary-load machines, drill slewing, excavator slew decks |
| Data period | Default 50ms (20–500ms) | Default 100ms (20–500ms) |
Rule of thumb: To measure "how much the body tilts forward/back or left/right" → dual-axis; to measure "how many degrees an axle has rotated" → single-axis.
Key Accuracy and Stability Specs
For either type, verify these:
- Resolution ≤0.01°: Detects minute tilt changes.
- Accuracy ≤±0.1° full range: Core metric for construction safety ratings.
- Temperature drift ≤±0.008°/°C: Outdoor day-night swings cause reading drift that may cause false/missed alarms.
- Startup response ≤100ms: Quick to working state without delaying machine startup.
- Vibration resistance >5000g: A MEMS advantage against construction vibration.
The JGY JGYTS family uses micro-machined silicon capacitance + MEMS, with ≤±0.1° full-range accuracy, >5000g vibration resistance, built-in filtering and temperature compensation — a useful benchmark.
Electrical and Interface Details
- 6-36VDC wide voltage: Compatible with multiple supplies, reverse-polarity protected.
- IP68: Withstands dust, rain, brief submersion — essential outdoors.
- M12 5pin metal threaded connector: Vibration-proof, industrial-grade.
- Cast aluminum ADC12 + anodized housing: Corrosion-resistant and durable.
- Power ≤150mA@12VDC (standby ≤50mA): Friendly to battery-powered scenes.
M12 5pin pinout is fixed: 1=CAN-L, 2=CAN-H, 3=GND, 4=POWER, 5=DO (alarm digital output) — uniform for volume production.
Communication Protocol and Configuration
- Protocol: CANopen (DS301/DS406) — recognized directly by mainstream controllers.
- Baud rate: 125k/250k/500k/1Mbps, default 250kbps; must match the bus.
- Remote configuration: Online parameter tuning via CAN, no disassembly — saves field and after-sales time.
- Firmware upgrade: Supports remote upgrade, avoiding factory returns.
Self-Diagnostics and Alarms
The JGYTS family has a complete fault-code system (partial):
- 0x81–0x8E: Power-on self-test, interrupt, watchdog faults
- 0x94–0x98: FLASH, power, temperature faults
- 0x9A: CAN bus electrical fault
- 0xA8/0xB2: Sensor 1/2 communication errors
- 0xBC: Dual-sensor readings differ by more than 3° (dual-axis redundancy check)
- 0xBD–0xBF: Sensor over-range
Fault codes can be pushed via CAN to the controller, triggering audio/visual alarms or automatic motion limits — a key safety design element.
Selection Checklist
- Machine is aerial platform / scissor lift / crane base? → Dual-axis JGYTS-2B
- Machine is drill slewing / excavator slew / rotary load? → Single-axis JGYTS-1B
- Big temperature swings, long-term outdoor? → Check temp drift and IP68
- Need to tune parameters without disassembly? → Pick CAN-bus remotely configurable models
- High safety rating required? → Choose models with self-diagnostics + dual-sensor redundancy
The JGY JGYTS family (single-axis JGYTS-1B / dual-axis JGYTS-2B) covers all the above. To match an inclinometer solution to your machine, contact us.