5-pin DIN connector: MIDI and legacy uses

The useful distinction

Recognize it. Then verify it.

A five-pin DIN shell appears in MIDI and legacy computer contexts; the shell alone does not identify the application. [C110A]

The MIDI Association separately specifies a MIDI transport using five-pin DIN. [C110B]

REAN identifies NYS322 as a male five-pole DIN cable component; its linked end view places the five contacts in a lower arc below the key. [C110C]

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Nominal contacts	5S089Nominal contact count; some implementations may omit populated positions. It is not a wiring map.
Connector role	plug (NYS322)S617Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NYS322. Documented role: plug. 6.5mmmaximum cableOD is wire acceptance,not shell diameter.; NYS322drawingS618full text provides59.5,13.35diameter,16diameter but axes not visually verified after503; these are not adopted as geometry.; Gold-platedNYS322G andgold-shellNYS322AG variants stay separate; no MIDI circuit map from physical5pin form.
Manufacturer	REAN (NYS322)S617Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NYS322. Documented role: plug. 6.5mmmaximum cableOD is wire acceptance,not shell diameter.; NYS322drawingS618full text provides59.5,13.35diameter,16diameter but axes not visually verified after503; these are not adopted as geometry.; Gold-platedNYS322G andgold-shellNYS322AG variants stay separate; no MIDI circuit map from physical5pin form.
Series	NYS322 DIN (NYS322)S617Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NYS322. Documented role: plug. 6.5mmmaximum cableOD is wire acceptance,not shell diameter.; NYS322drawingS618full text provides59.5,13.35diameter,16diameter but axes not visually verified after503; these are not adopted as geometry.; Gold-platedNYS322G andgold-shellNYS322AG variants stay separate; no MIDI circuit map from physical5pin form.
Exact part / implementation	NYS322 (NYS322)S617Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NYS322. Documented role: plug. 6.5mmmaximum cableOD is wire acceptance,not shell diameter.; NYS322drawingS618full text provides59.5,13.35diameter,16diameter but axes not visually verified after503; these are not adopted as geometry.; Gold-platedNYS322G andgold-shellNYS322AG variants stay separate; no MIDI circuit map from physical5pin form.

Not recorded: Positions / cavity span, Populated contacts, Contact rows, Contact pitch, Dimensions / axis, Contact gender / arrangement, Mounting, Coupling / latch, Keying / polarization, Shell / form, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits

Check the exact device manual before wiring or applying power.
MIDI 1.0 OUT (and optional THRU) jack, 5-pin 180-degree DIN female, CA-033: Pin numbers as drawn in CA-033 Figures 1-2 (DIN numbering 1-3-5-2-4 arc); the figures are schematic, not a dimensioned face view.
MIDI 1.0 IN jack, 5-pin 180-degree DIN female, CA-033: As for midi-out-thru.
IBM Personal Computer AT keyboard connector (system board J22) and keyboard cable DIN: IBM states pin numbering is shown in the Keyboard section; this pass relied on the text tables only, so no spatial face view is asserted.
MIDI 1.0 OUT jack (MMA CA-033): Use DIN contact numbers 1-5 (180-degree layout). Spatial positions are not transferred from any figure; MIDI device jacks are female, cables male (CA-033 p. 3).
MIDI 1.0 IN jack (MMA CA-033): Use DIN contact numbers 1-5 (180-degree layout). Spatial positions are not transferred from any figure; MIDI device jacks are female, cables male (CA-033 p. 3).
MIDI 1.0 THRU jack, optional (MMA CA-033): Use DIN contact numbers 1-5 (180-degree layout). Spatial positions are not transferred from any figure; MIDI device jacks are female, cables male (CA-033 p. 3).
IBM Personal Computer AT keyboard connector J22 (system board) / keyboard cable DIN end: Use DIN contact numbers 1-5 (180-degree layout). Spatial positions are not transferred from any figure; MIDI device jacks are female, cables male (CA-033 p. 3).
PC AT keyboard 5-pin DIN as tabulated in Atmel AVR313: Use DIN contact numbers 1-5 (180-degree layout). Spatial positions are not transferred from any figure; MIDI device jacks are female, cables male (CA-033 p. 3).

Report a correction to these facts →

Bounded facts, visible unknowns

Specifications and limits

5-pin DIN connector: MIDI and legacy uses facts and limitations
Documented identification	The DIN guide describes a five-pin circular connector used by older AT-style keyboards. [C110A]
Important distinction	The MIDI Association separately specifies a MIDI transport using five-pin DIN. [C110B]
Source-observed V148 component scope	REAN NYS322 male DIN component, not an identified MIDI device port. [C110C]
Mechanical dimensions	No independently approved mechanical dimensions. Do not use this record for fabrication or fit testing.
Engineering pinout	Source-checked engineering profile available; independent review pending. Open engineering profile →
Verified device list	Not included. Check exact device and accessory documentation.

A boundary, not an omission to guess around.

Record the exact device model and the label beside the port. Obtain its manual and the accessory documentation. Keep unknown properties unknown instead of filling them from a visually similar item.

Before you connect

What to check

Read MIDI IN, OUT or THRU markings when present.
Confirm the device uses the documented DIN arrangement.
Check the exact adapter specification for any TRS MIDI connection.

Trace a supported connection class →

Pins & wiring

Pinout

Choose the exact wiring. Pin numbers follow its stated view; a schematic does not establish physical positions. Check your exact device before wiring.

Dark pinout view

What the status labels mean

Confirmed: Recorded research passes agree within this variant; this is not independent human review or hardware validation.
Single source: Only one underlying document, or one pass, supports this assignment.
Device-specific: Supported for the named equipment or wiring only. Check your device’s manual.
Unverified: Missing or conflicting evidence. Do not wire from this row.
Not connected: The source explicitly says NC, no contact or no pin for this wiring.

Wiring variantMIDI 1.0 OUT (and optional THRU) jack, 5-pin 180-degree DIN female, …

MIDI 1.0 OUT (and optional THRU) jack, 5-pin 180-degree DIN female, CA-033

View and evidence limits

Pin numbers as drawn in CA-033 Figures 1-2 (DIN numbering 1-3-5-2-4 arc); the figures are schematic, not a dimensioned face view.

P110 5-pin DIN — **Agree** on MIDI OUT/THRU (2 shield, 4 current source, 5 data; 1 and 3 N/C), MIDI IN (4 and 5 loop to opto-isolator, 2 shield with no ground path) and IBM PC AT keyboard (1 clock, 2 data, 3 reserved, 4 ground, 5 +5 V) — Both used MIDI Association CA-033 and the IBM AT Technical Reference. B adds Atmel AVR313 as a second keyboard source.
THRU uses the same pin roles as OUT (Figure 2 optional THRU circuit: pin 4 via RE from VTX, pin 5 via RF from the buffered receiver data, pin 2 to ground, pins 1/3 N/C).
Jack shield (shell) may be N/C or grounded for EMI/EMC; it is not a numbered pin.
The IBM PC and PC/XT technical references were not retrieved; the XT-era use of pin 3 was not established.
No primary document for DIN audio, tape-recorder or other 5-pin DIN uses was retrieved.
Superseded by CA-033 for hardware; the original edition was not separately checked.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

MIDI 1.0 OUT (and optional THRU) jack, 5-pin 180-degree DIN female, CA-033 — source-scoped contact map
Pin	Signal	What it does	Status
1	N/C	Not connected or absent in this named wiring.	Not connected Sources
2	Shield / ground	Cable screen or shield connection; check the named equipment.	Single source Sources
3	N/C	Not connected or absent in this named wiring.	Not connected Sources
4	Current source (VTX via RA)	Signal conductor. Pair, polarity and direction follow this named wiring.	Single source Sources
5	Data (UART TX via RC)	Signal conductor. Pair, polarity and direction follow this named wiring.	Single source Sources

Sources (1)

S729 · MIDI Manufacturers Association / AMEI (published by The MIDI Association) · (CA-033) MIDI 1.0 Electrical Specification Update [2014]
CA# 033; issue date Aug 1 2014; MMA approval Jan 20 2014 | Issue date Aug 1 2014; MMA approval Jan 20 2014; replaces Hardware section of MIDI 1.0 Detailed Specification v4.2 · p. 2, Figure 1 'MIDI OUT Circuit' and side notes ('Pin 2 must be tied to ground on the MIDI transmitter only'); p. 3, 'MIDI Device Connectors' text ('Note that pins 1 and 3 are not used, and should be left unconnected in the receiver and transmitter'); pp. 3-4, 'MIDI Cable' text and Figure 3 (shield connected only to pin 2 at both ends)

MIDI 1.0 IN jack, 5-pin 180-degree DIN female, CA-033

View and evidence limits

As for midi-out-thru.

P110 5-pin DIN — **Agree** on MIDI OUT/THRU (2 shield, 4 current source, 5 data; 1 and 3 N/C), MIDI IN (4 and 5 loop to opto-isolator, 2 shield with no ground path) and IBM PC AT keyboard (1 clock, 2 data, 3 reserved, 4 ground, 5 +5 V) — Both used MIDI Association CA-033 and the IBM AT Technical Reference. B adds Atmel AVR313 as a second keyboard source.
'Do not connect any pins of the MIDI IN jack directly to ground.' Jack shield: N/C or optional 0.1 uF capacitor to ground.
The IBM PC and PC/XT technical references were not retrieved; the XT-era use of pin 3 was not established.
No primary document for DIN audio, tape-recorder or other 5-pin DIN uses was retrieved.
Superseded by CA-033 for hardware; the original edition was not separately checked.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

MIDI 1.0 IN jack, 5-pin 180-degree DIN female, CA-033 — source-scoped contact map
Pin	Signal	What it does	Status
1	N/C	Not connected or absent in this named wiring.	Not connected Sources
2	Shield (no DC ground)	Cable screen or shield connection; check the named equipment.	Single source Sources
3	N/C	Not connected or absent in this named wiring.	Not connected Sources
4	Current loop (to opto-isolator via RB)	Control, detection or configuration connection; check the source and device.	Single source Sources
5	Current loop return (opto-isolator)	Control, detection or configuration connection; check the source and device.	Single source Sources

Sources (1)

S729 · MIDI Manufacturers Association / AMEI (published by The MIDI Association) · (CA-033) MIDI 1.0 Electrical Specification Update [2014]
CA# 033; issue date Aug 1 2014; MMA approval Jan 20 2014 | Issue date Aug 1 2014; MMA approval Jan 20 2014; replaces Hardware section of MIDI 1.0 Detailed Specification v4.2 · p. 3, Figure 2 'MIDI IN and THRU circuit'; p. 3, 'MIDI Device Connectors' text ('Note that pins 1 and 3 are not used, and should be left unconnected in the receiver and transmitter')

IBM Personal Computer AT keyboard connector (system board J22) and k…

IBM Personal Computer AT keyboard connector (system board J22) and keyboard cable DIN

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

IBM states pin numbering is shown in the Keyboard section; this pass relied on the text tables only, so no spatial face view is asserted.

P110 5-pin DIN — **Agree** on MIDI OUT/THRU (2 shield, 4 current source, 5 data; 1 and 3 N/C), MIDI IN (4 and 5 loop to opto-isolator, 2 shield with no ground path) and IBM PC AT keyboard (1 clock, 2 data, 3 reserved, 4 ground, 5 +5 V) — Both used MIDI Association CA-033 and the IBM AT Technical Reference. B adds Atmel AVR313 as a second keyboard source.
J22 is described as a '5-pin, 90-degree Printed Circuit Board (PCB) mounting, DIN connector' (90-degree refers to the right-angle PCB mount).
101/102-key cable table (p. 4-37) also maps cable shield to frame ground on the SDL end; that is not a DIN pin.
The IBM PC and PC/XT technical references were not retrieved; the XT-era use of pin 3 was not established.
No primary document for DIN audio, tape-recorder or other 5-pin DIN uses was retrieved.
Superseded by CA-033 for hardware; the original edition was not separately checked.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

IBM Personal Computer AT keyboard connector (system board J22) and keyboard cable DIN — source-scoped contact map
Pin	Signal	What it does	Status
1	Keyboard Clock (+KBD CLK)	Clock or clock-control connection, as named by this source.	Device-specific Sources
2	Keyboard Data (+KBD DATA)	Signal conductor. Pair, polarity and direction follow this named wiring.	Device-specific Sources
3	Reserved	Reserved; no general-purpose wiring is established.	Device-specific Sources
4	Ground	Ground reference and return.	Device-specific Sources
5	+5 Vdc	Power connection (+5 Vdc). Check the specified supply.	Device-specific Sources

Sources (1)

S730 · IBM · Personal Computer AT Technical Reference (6183355)
Revised Edition (March 1986) · System Board section, printed p. 1-73, 'Keyboard Connector (J22)' pin assignment table; 84-Key Keyboard section, printed p. 4-5, 'Cabling' DIN Connector Pins table; 101/102-Key Keyboard section, printed p. 4-37, 'Cabling' table (DIN pins vs SDL pins)

MIDI 1.0 OUT jack (MMA CA-033)

View and evidence limits

Use DIN contact numbers 1-5 (180-degree layout). Spatial positions are not transferred from any figure; MIDI device jacks are female, cables male (CA-033 p. 3).

P110 5-pin DIN — **Agree** on MIDI OUT/THRU (2 shield, 4 current source, 5 data; 1 and 3 N/C), MIDI IN (4 and 5 loop to opto-isolator, 2 shield with no ground path) and IBM PC AT keyboard (1 clock, 2 data, 3 reserved, 4 ground, 5 +5 V) — Both used MIDI Association CA-033 and the IBM AT Technical Reference. B adds Atmel AVR313 as a second keyboard source.
Legacy domestic-audio 5-pin DIN wiring (record/playback, stereo) was not established from a primary document; the standards are paywalled and no manufacturer manual was read.
CA-033 defines roles by circuit figures, not by text names such as 'source'/'sink'; signal names above are descriptive paraphrases of Figures 1 and 2.
Other proprietary uses (e.g. synthesiser sync, DC power, older video) were not researched.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

MIDI 1.0 OUT jack (MMA CA-033) — source-scoped contact map
Pin	Signal	What it does	Status
1	N/C	Not connected or absent in this named wiring.	Not connected Sources
2	Ground / shield	Cable screen or shield connection; check the named equipment.	Single source Sources
3	N/C	Not connected or absent in this named wiring.	Not connected Sources
4	Current source (via RA to VTX)	Signal conductor. Pair, polarity and direction follow this named wiring.	Single source Sources
5	Data / current sink (via RC from UART)	Signal conductor. Pair, polarity and direction follow this named wiring.	Single source Sources

Sources (1)

S729 · MIDI Manufacturers Association / AMEI (published by The MIDI Association) · (CA-033) MIDI 1.0 Electrical Specification Update [2014]
CA# 033; issue date Aug 1 2014; MMA approval Jan 20 2014 | Issue date Aug 1 2014; MMA approval Jan 20 2014; replaces Hardware section of MIDI 1.0 Detailed Specification v4.2 · p. 2, Figure 1 'MIDI OUT Circuit' and side notes ('Pin 2 must be tied to ground on the MIDI transmitter only'); p. 3, 'MIDI Device Connectors' (pins 1 and 3 not used; shield options)

MIDI 1.0 IN jack (MMA CA-033)

View and evidence limits

Use DIN contact numbers 1-5 (180-degree layout). Spatial positions are not transferred from any figure; MIDI device jacks are female, cables male (CA-033 p. 3).

P110 5-pin DIN — **Agree** on MIDI OUT/THRU (2 shield, 4 current source, 5 data; 1 and 3 N/C), MIDI IN (4 and 5 loop to opto-isolator, 2 shield with no ground path) and IBM PC AT keyboard (1 clock, 2 data, 3 reserved, 4 ground, 5 +5 V) — Both used MIDI Association CA-033 and the IBM AT Technical Reference. B adds Atmel AVR313 as a second keyboard source.
Legacy domestic-audio 5-pin DIN wiring (record/playback, stereo) was not established from a primary document; the standards are paywalled and no manufacturer manual was read.
CA-033 defines roles by circuit figures, not by text names such as 'source'/'sink'; signal names above are descriptive paraphrases of Figures 1 and 2.
Other proprietary uses (e.g. synthesiser sync, DC power, older video) were not researched.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

MIDI 1.0 IN jack (MMA CA-033) — source-scoped contact map
Pin	Signal	What it does	Status
1	N/C	Not connected or absent in this named wiring.	Not connected Sources
2	Shield (no DC path to ground)	Cable screen or shield connection; check the named equipment.	Single source Sources
3	N/C	Not connected or absent in this named wiring.	Not connected Sources
4	Loop input to opto-isolator (via RB 220 ohm)	Control, detection or configuration connection; check the source and device.	Single source Sources
5	Loop return from opto-isolator	Control, detection or configuration connection; check the source and device.	Single source Sources

Sources (1)

S729 · MIDI Manufacturers Association / AMEI (published by The MIDI Association) · (CA-033) MIDI 1.0 Electrical Specification Update [2014]
CA# 033; issue date Aug 1 2014; MMA approval Jan 20 2014 | Issue date Aug 1 2014; MMA approval Jan 20 2014; replaces Hardware section of MIDI 1.0 Detailed Specification v4.2 · p. 3, Figure 2 'MIDI IN and THRU circuit' (IN half) and 'MIDI Device Connectors' text

MIDI 1.0 THRU jack, optional (MMA CA-033)

View and evidence limits

Use DIN contact numbers 1-5 (180-degree layout). Spatial positions are not transferred from any figure; MIDI device jacks are female, cables male (CA-033 p. 3).

P110 5-pin DIN — **Agree** on MIDI OUT/THRU (2 shield, 4 current source, 5 data; 1 and 3 N/C), MIDI IN (4 and 5 loop to opto-isolator, 2 shield with no ground path) and IBM PC AT keyboard (1 clock, 2 data, 3 reserved, 4 ground, 5 +5 V) — Both used MIDI Association CA-033 and the IBM AT Technical Reference. B adds Atmel AVR313 as a second keyboard source.
Legacy domestic-audio 5-pin DIN wiring (record/playback, stereo) was not established from a primary document; the standards are paywalled and no manufacturer manual was read.
CA-033 defines roles by circuit figures, not by text names such as 'source'/'sink'; signal names above are descriptive paraphrases of Figures 1 and 2.
Other proprietary uses (e.g. synthesiser sync, DC power, older video) were not researched.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

MIDI 1.0 THRU jack, optional (MMA CA-033) — source-scoped contact map
Pin	Signal	What it does	Status
1	N/C	Not connected or absent in this named wiring.	Not connected Sources
2	Ground / shield	Cable screen or shield connection; check the named equipment.	Single source Sources
3	N/C	Not connected or absent in this named wiring.	Not connected Sources
4	Current source (via RE to VTX)	Signal conductor. Pair, polarity and direction follow this named wiring.	Single source Sources
5	Data / current sink (via RF from buffer)	Signal conductor. Pair, polarity and direction follow this named wiring.	Single source Sources

Sources (1)

S729 · MIDI Manufacturers Association / AMEI (published by The MIDI Association) · (CA-033) MIDI 1.0 Electrical Specification Update [2014]
CA# 033; issue date Aug 1 2014; MMA approval Jan 20 2014 | Issue date Aug 1 2014; MMA approval Jan 20 2014; replaces Hardware section of MIDI 1.0 Detailed Specification v4.2 · p. 3, Figure 2 'MIDI IN and THRU circuit', Optional MIDI Thru Circuit (RE to pin 4, RF to pin 5, pin 2 to ground)

IBM Personal Computer AT keyboard connector J22 (system board) / key…

IBM Personal Computer AT keyboard connector J22 (system board) / keyboard cable DIN end

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

IBM PC AT J22 and keyboard cable DIN contact numbers1-5 only. Spatial positions are not established by this table-only normalization; MIDI female-jack wording does not apply to this keyboard connector.

P110 5-pin DIN — **Agree** on MIDI OUT/THRU (2 shield, 4 current source, 5 data; 1 and 3 N/C), MIDI IN (4 and 5 loop to opto-isolator, 2 shield with no ground path) and IBM PC AT keyboard (1 clock, 2 data, 3 reserved, 4 ground, 5 +5 V) — Both used MIDI Association CA-033 and the IBM AT Technical Reference. B adds Atmel AVR313 as a second keyboard source.
Legacy domestic-audio 5-pin DIN wiring (record/playback, stereo) was not established from a primary document; the standards are paywalled and no manufacturer manual was read.
CA-033 defines roles by circuit figures, not by text names such as 'source'/'sink'; signal names above are descriptive paraphrases of Figures 1 and 2.
Other proprietary uses (e.g. synthesiser sync, DC power, older video) were not researched.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

IBM Personal Computer AT keyboard connector J22 (system board) / keyboard cable DIN end — source-scoped contact map
Pin	Signal	What it does	Status
1	Keyboard Clock (+KBD CLK)	Clock or clock-control connection, as named by this source.	Device-specific Sources
2	Keyboard Data (+KBD DATA)	Signal conductor. Pair, polarity and direction follow this named wiring.	Device-specific Sources
3	Reserved	Reserved; no general-purpose wiring is established.	Device-specific Sources
4	Ground	Ground reference and return.	Device-specific Sources
5	+5 Vdc	Power connection (+5 Vdc). Check the specified supply.	Device-specific Sources

Sources (1)

S731 · IBM · Technical Reference, Personal Computer AT
Revised Edition (March 1986), part 6183355 · Section 1 System Board, 'Keyboard Connector (J22)' table; Section 4, 84-Key Keyboard, 'Cabling', DIN Connector Pins table; Section 4, 101/102-Key Keyboard, 'Cabling' table (DIN pins vs SDL pins)

PC AT keyboard 5-pin DIN as tabulated in Atmel AVR313

View and evidence limits

Atmel AVR313 PC AT keyboard DIN contact numbers1-5 only. Spatial positions and equipment connector gender are not established here; MIDI female-jack wording does not apply.

P110 5-pin DIN — **Agree** on MIDI OUT/THRU (2 shield, 4 current source, 5 data; 1 and 3 N/C), MIDI IN (4 and 5 loop to opto-isolator, 2 shield with no ground path) and IBM PC AT keyboard (1 clock, 2 data, 3 reserved, 4 ground, 5 +5 V) — Both used MIDI Association CA-033 and the IBM AT Technical Reference. B adds Atmel AVR313 as a second keyboard source.
Legacy domestic-audio 5-pin DIN wiring (record/playback, stereo) was not established from a primary document; the standards are paywalled and no manufacturer manual was read.
CA-033 defines roles by circuit figures, not by text names such as 'source'/'sink'; signal names above are descriptive paraphrases of Figures 1 and 2.
Other proprietary uses (e.g. synthesiser sync, DC power, older video) were not researched.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

PC AT keyboard 5-pin DIN as tabulated in Atmel AVR313 — source-scoped contact map
Pin	Signal	What it does	Status
1	Clock	Clock or clock-control connection, as named by this source.	Single source Sources
2	Data	Signal conductor. Pair, polarity and direction follow this named wiring.	Single source Sources
3	nc	Not connected or absent in this named wiring.	Not connected Sources
4	GND	Ground reference and return.	Single source Sources
5	+5V	Power connection (+5V). Check the specified supply.	Single source Sources

Sources (1)

S724 · Atmel (now Microchip Technology) · AVR313: Interfacing the PC AT Keyboard (application note)
Rev. 1235B-AVR-05/02 · p. 2, Table 1 'AT Keyboard Connector Pin Assignments', column 'DIN41524, Female at Computer, 5-pin DIN 180 degrees'

What is not established

This field note does not approve a connection, publish a pinout or provide a measured template. Use the linked source scope and the checklist as a documentation starting point.

A DIN component is not a MIDI cable

The named NYS322 study documents the component and its source-facing arrangement. Its five positions do not identify what an installed socket carries. MIDI is separately defined at the transport and device level; the existing MIDI Association source distinguishes DIN and TRS specifications.

Check the equipment before an adapter

Read the equipment model, connector label and port direction in its manual. Keep the connector drawing separate from the device’s MIDI or legacy-computer application. A DIN-to-TRS cable is not established by matching the two outlines.

Your next step

Move from the form to the requirement.

Read the engineering reference Source-scoped details, orientation and explicit unknowns.Work through a connection Choose your task before deciding on a cable.Explore this evidence trail Inspect the claims and their dependencies.

The source trail

Evidence for this page

AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.

Back to first citation ↑

C110ASource checked · pending review

The DIN guide describes a five-pin circular connector used by older AT-style keyboards.

C2G / Legrand · DIN and Mini-DIN identification guide ↗

Locator: 5-pin DIN; 4-pin Mini DIN; 6-pin Mini DIN
Access: public page. A historical application is not a guarantee of what a particular port carries.

S089: full source recordInspect review dependencies →

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval. Next review due 2027-01-01.

Back to first citation ↑

C110BSource checked · pending review

The MIDI Association separately specifies a MIDI transport using five-pin DIN.

MIDI Association · MIDI transports — DIN and TRS ↗

Locator: 5 PIN DIN ELECTRICAL SPECS; SPECIFICATION FOR USE OF TRS CONNECTORS WITH MIDI DEVICES
Access: public page. No pinout or adapter wiring is reproduced; this overview does not establish a given device wiring type.

S090: full source recordInspect review dependencies →

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval. Next review due 2027-01-01.

Back to first citation ↑

C110CSource checked · pending review

REAN identifies NYS322 as a male five-pole DIN cable component; its linked end view places the five contacts in a lower arc below the key.

REAN · REAN NYS322 male five-pole DIN cable connector ↗

Locator: Product description; gender; article variations; linked NYS322 drawing.
Access: public page. Exact NYS322 component identity; not a MIDI cable, device role or transport approval. Raw document bytes were not obtained in the container; no raw-file hash or archived-source possession is claimed.

S617: full source record REAN · NYS322 component drawing ↗

Locator: Single sheet; side and end views. Designer/checked date 2020.11.11. Five lower-arc contact positions and upper key visually inspected.
Access: public page. Product-linked male DIN component; no source dimensions, pin numbers or circuit copied. Raw document bytes were not obtained in the container; no raw-file hash or archived-source possession is claimed.

S618: full source recordInspect review dependencies →

Claim scope: Named component identity and observed end view only. This does not establish MIDI service, IN/OUT direction or a completed MIDI cable.. Next review due 2027-01-11.

Suggest a correction to this field note →

5-pin DIN connector: MIDI and legacy uses

See the view. Check its scope.

5-pole DIN / NYS322

Recognize it. Then verify it.

Source-scoped identification facts

Specifications and limits

What to check

Pinout

MIDI 1.0 OUT (and optional THRU) jack, 5-pin 180-degree DIN female, CA-033

MIDI 1.0 IN jack, 5-pin 180-degree DIN female, CA-033

IBM Personal Computer AT keyboard connector (system board J22) and keyboard cable DIN

MIDI 1.0 OUT jack (MMA CA-033)

MIDI 1.0 IN jack (MMA CA-033)

MIDI 1.0 THRU jack, optional (MMA CA-033)

IBM Personal Computer AT keyboard connector J22 (system board) / keyboard cable DIN end

PC AT keyboard 5-pin DIN as tabulated in Atmel AVR313

What is not established

A DIN component is not a MIDI cable

Check the equipment before an adapter

Move from the form to the requirement.

Evidence for this page

Put this field note to work.

A DIN outline does not establish MIDI.

Scope first. Source second. Approval separate.

S089 · DIN and Mini-DIN identification guide

S090 · MIDI transports — DIN and TRS

S617 · REAN NYS322 male five-pole DIN cable connector

S618 · NYS322 component drawing

C110A · P110

C110B · P110

C110C · P110

5-pin DIN connector: MIDI and legacy uses

5-pole DIN / NYS322

Recognize it. Then verify it.

Source-scoped identification facts

Specifications and limits

What to check

Pinout

MIDI 1.0 OUT (and optional THRU) jack, 5-pin 180-degree DIN female, CA-033

MIDI 1.0 IN jack, 5-pin 180-degree DIN female, CA-033

IBM Personal Computer AT keyboard connector (system board J22) and keyboard cable DIN

MIDI 1.0 OUT jack (MMA CA-033)

MIDI 1.0 IN jack (MMA CA-033)

MIDI 1.0 THRU jack, optional (MMA CA-033)

IBM Personal Computer AT keyboard connector J22 (system board) / keyboard cable DIN end

PC AT keyboard 5-pin DIN as tabulated in Atmel AVR313

What is not established

A DIN component is not a MIDI cable

Check the equipment before an adapter

Move from the form to the requirement.

Evidence for this page

Related field notes

3.5 mm TRS connector

6-pin Mini-DIN (PS/2 form)

5-pin XLR connector

MIDI DIN and audio plugs: separate shape from transport

Put this field note to work.

A DIN outline does not establish MIDI.

Scope first. Source second. Approval separate.

S089 · DIN and Mini-DIN identification guide

S090 · MIDI transports — DIN and TRS

S617 · REAN NYS322 male five-pole DIN cable connector

S618 · NYS322 component drawing

C110A · P110

C110B · P110

C110C · P110