Mitsubishi OSE104 Serial Encoders

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Overview

Proprietary serial encoders made by Mitsubishi meant to work with their MELDAS CNC controllers. It uses 2.5 Mbaud RS-422 to communicate with the controller. The protocol has been partially reverse engineered, and is supported by Rene Hopf's STMBL servo drive.

Specifications

Page 195 (III-58 in the PDF) of the BNP-C3000C(ENG) manual details the specifications for different variants.

Wiring Diagram

Wire Color Circular Pin Mini-D Pin Function
green N (shield) (case GND)
gray L 17 RQ-
orange K 7 RQ+
yellow J 16 SD-
red E 9 (battery)
blue H 6 SD+
black R 1,11 0V
white S 10,19,20 +5V

Bill of Materials

MC34051 RS-422 transceiver chip.

Online Resources

Mitsubishi MELDAS MDS-C1 Series AC Servo/Spindle Specifications Manual

stmbl/encm.c at master · rene-dev/stmbl