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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 ==

[https://s3.amazonaws.com/Icarus/DOCUMENTS/Mitsubishi_Manuals_1004.pdf#page=195 Page 195] (III-58 in the PDF) of the BNP-C3000C(ENG) manual details the specifications for different variants.

== Wiring Diagram ==

{| class="wikitable"
! 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 ==

[https://s3.amazonaws.com/Icarus/DOCUMENTS/Mitsubishi_Manuals_1004.pdf Mitsubishi MELDAS MDS-C1 Series AC Servo/Spindle Specifications Manual]

[https://github.com/rene-dev/stmbl/blob/master/src/comps/encm.c stmbl/encm.c at master · rene-dev/stmbl]

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