Waterproof Servo Motors and Accessories Guide

The actuator supports RS422 (configured as RS485 full duplex on 4 wires) and RS232 serial communication at 19,200 baud with 8, N, 1 settings. Communication parameters are stored in EEPROM for retention across power cycles. This makes it compatible with standard subsea control systems and ROV tether management setups.

Yes. The actuator uses a 30-bit absolute multi-turn encoder — 14-bit single-turn resolution plus a 16-bit turns counter — mounted on the output shaft. This encoder retains complete position information across power cycles without requiring a homing routine, which is critical for precision subsea robotics and valve control applications.

The Rotary Actuator – Self Compensated delivers a nominal continuous torque of 19 ft·lbf (27 Nm) with a maximum output shaft speed of 30 RPM at a gear ratio of 238:1. It supports both continuous jog mode and precise position control with a resolution of 0.1 degrees at the output shaft.

The actuator operates on 24 VDC with a maximum continuous current draw of 2.9 A. This standard voltage makes it straightforward to integrate with common ROV power distribution systems and subsea electronic housings, reducing the need for custom power conversion hardware.

The actuator uses an MCBH8M Subconn underwater connector with 8 pins. This is a widely used subsea wet-mateable connector standard in ROV and underwater robotics applications, providing reliable sealing and electrical connection during underwater deployment and operation.

NV Mechanics Design Ltd. provides product documentation, a quick start guide, an interface and integration manual, a Windows control application (DCBL_ABS_Control_Rot_9), and a sample assembly drawing — all available for download. These resources support fast integration into ROV systems and custom underwater robotic platforms.