LRF0610C 6km 1535nm Eye-Safe Multi-Pulse Laser Rangefinder Module with TTL / RS-422 Interface

TECHNICAL SPECIFICATIONS

OUTLINE DIMENSION(mm)

PIN INTERFACE

Selectable between TTL (Molex 51021-0500) / RS-422 (J30J)

1. Electrical connector model: Molex51021-0500. The detailed definition of the electrical interface is as follows:

Table 1 Interface definition

2. Electrical connector model: J30J; The corresponding plug and cable shall be provided by Party B. The detailed definition of the electrical interface is shown in the following table:

Interface Definition

Product Description

LRF0610C 6km 1535nm Eye-Safe Multi-Pulse Laser Rangefinder Module with TTL / RS-422 Interface

The LRF0610C is a 1535nm Class I eye-safe multi-pulse laser rangefinder module designed for OEM integration in laser measurement systems, unmanned aerial systems (UAS), optical pods and boundary-monitoring sensors. It uses a 1535±5nm erbium-glass laser, multi-pulse time-of-flight processing and selectable TTL or RS-422 serial communication to deliver long-range performance in a compact, rugged package.

The module provides a NATO target (2.3m×2.3m) measuring range of ≥6000m at 30% reflectance and ≥8km visibility, and a human-size target (0.5m×1.7m) range of ≥1500m under the same conditions. Minimum range is ≤15m. With a divergence angle of ≤0.5mrad, laser energy ≥200µJ, and launch/receive apertures of Φ10mm and Φ25mm, the LRF0610C combines tight beam control with sufficient energy for reliable returns at 6km-class distances. Ranging accuracy is ±2m, range resolution ≤0.1m, precision rate ≥98% and false alarm rate ≤1%, with up to 3 targets reported per shot.

Ranging frequency is adjustable from 0.5Hz to 10Hz, so engineers can set slow, power-saving cycles or faster updates as needed. Single-shot and continuous-ranging modes are supported. In continuous mode, the main controller specifies the ranging period in milliseconds over the serial link, and the rangefinder returns distance and status for up to three targets according to the programmed cycle. This makes the LRF0610C suitable for everything from slow-scanning boundary-monitoring towers to faster UAS and gimbal applications.

Electrically, the module is powered from DC 12V, with ≤1mW standby power, ≤2.5W average power at 10Hz and ≤7W peak power at 12V. Two interface options are available:

• A TTL (3.3V) interface on a Molex 51021-0500 5-pin connector (RX, TX, CTRL, +12V, GND)

• An RS-422 differential interface on a J30J connector with separate RX+/RX− and TX+/TX− lines and redundant supply pins

This flexibility allows direct connection to low-voltage embedded controllers or longer cable runs using RS-422 in vehicle, mast or fixed-site installations.

Communication uses a simple master–slave protocol at 115200bps, 8 data bits, 1 start bit, 1 stop bit and no parity. Commands include standby, single ranging, continuous ranging (with programmable period), self-test, distance selection and near-limit setting, cumulative shot-count query, APD power on/off and serial-number query. Range data frames include up to three distances (0.1m resolution) along with a flag byte that reports main-wave and echo status, laser status, timeout, APD status and the presence of front and rear targets. These diagnostics help engineers quickly detect alignment issues, laser or APD problems and communication errors in the field.

Mechanically, the LRF0610C is housed in a 70mm × 32mm × 40mm package with a weight of ≤90g. It meets MIL-STD-810G impact and vibration requirements and operates from −40°C to +70°C, with storage from −55°C to +75°C. This combination of size, weight and environmental robustness allows the module to be mounted in UAS gimbals, compact optical pods, vehicle or border cameras and other outdoor equipment where both long-range performance and survivability are required.

For systems that require an external optical window, ERDI recommends using an AR coating optimized for 1525–1545nm with transmittance ≥99% and overall transmittance ≥97% after hydrophobic or hard coatings and mechanical integration. The optical window diameter, effective aperture, thickness (2–4mm), alignment (2–4° to the laser axis) and air gap should follow ERDI’s geometry and installation guidelines to minimize absorption and back-reflection while protecting the optics in real-world environments.

With its 6km NATO capability, multi-pulse TOF processing, selectable TTL/RS-422 interfaces and rugged mechanical design, the LRF0610C is well suited for long-range laser measurement, UAS payloads, optical and EO/IR pods, boundary and perimeter monitoring, industrial ranging systems and other applications where eye-safety, compactness and clean serial integration are critical.