E249 · Source-scoped pinout variants

M8 A-coded 4-position connector engineering reference

Phoenix Contact manufacturer overview provides male/female face-view numbering for the four-position M8 A-coded form.

Open field note Source trail

Source checked · no independent review claimed · Fabrication approved: no

M8 A-coded 4-position contact-designation reference original orientation schematic — Original pinout diagram; read the exact variant and view below. Not to scale.

Contact count

4

M8 A-coded signal connector

Mating boundary

Shape is not the verdict.

M8 A-coded male connector ↔ compatible M8 A-coded female connector

Orientation

How to read this profile

Contact labels 1–4 follow the documented male/female face-view numbering; V44 does not assign universal signal functions.

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	4S269Source-backed nominal position/contact count: 4.
Positions / cavity span	4 (Claim C249A); 4 (Claim C249B); 4 (Claim C249C); 4 (Phoenix Contact 1453481)S269 · S289 · S502 · S502Source-scoped examples are separate; select the exact variant and measured axis. V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof. V44 contact-designation/orientation reference only; no universal signal assignment, wire color, voltage/current rating or device compatibility is inferred. V121 named-product or explicitly scoped manufacturer distinction only; no wiring instruction, independent engineering approval or end-to-end compatibility guarantee. Phoenix Contact 1453481. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Connector role	Rear-mounted device connector, straight pin side with individual wire tails (Phoenix Contact 1453481)S502Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1453481. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Contact gender / arrangement	pin (Phoenix Contact 1453481)S502Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1453481. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Mounting	Rear mounting; M8 x 1 with flat nut (Phoenix Contact 1453481)S502Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1453481. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Keying / polarization	A coding (Phoenix Contact 1453481)S502Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1453481. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Manufacturer	Phoenix Contact (Phoenix Contact 1453481)S502Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1453481. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Exact part / implementation	Phoenix Contact 1453481 (Phoenix Contact 1453481)S502Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1453481. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.

Not recorded: Populated contacts, Contact rows, Contact pitch, Dimensions / axis, Coupling / latch, Shell / form, Series, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits

A-coding and contact numbering do not by themselves establish protocol, wire color, voltage/current rating or connected-device support.
No fabrication dimensions or mating tolerances are published in this profile.
ifm PQS812 pressure sensor plug: ifm PQS812 p.4 plug drawing as printed: 2 upper left,4 upper right,1 lower left,3 lower right. Source names it a plug; no rear-view conversion asserted.
SICK MPS-M position sensor male M8 A-coded 4-pin: SICK MPS-M male M8 connector, numbered-contact convention from Table 3. No solder-side or complementary-socket mirror inferred.

Report a correction to these facts →

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 variantifm PQS812 pressure sensor plug

ifm PQS812 pressure sensor plug

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

View and evidence limits

ifm PQS812 p.4 plug drawing as printed: 2 upper left,4 upper right,1 lower left,3 lower right. Source names it a plug; no rear-view conversion asserted.

P249 M8 A-coded 4-position — **Partial**: different named sensors — A's ifm PQS812 has 1 L+, 2 digital OUT, 3 L-, 4 multifunction output/IO-Link. B's SICK MPS-M has 1 supply, 2 analog UOUT, 3 return, 4 IO-Link. Supply/return positions align; output type and behavior are device-specific. Different manufacturers, not conflicting accounts of one device.
Four-position M8 A coding does not establish universal voltage, output type or signal assignment.

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

ifm PQS812 pressure sensor plug — source-scoped contact map
Pin	Signal	What it does	Status
1	L+	Control, detection or configuration connection; check the source and device.	Device-specific Sources
2	OUT (DO)	Control, detection or configuration connection; check the source and device.	Device-specific Sources
3	L-	Control, detection or configuration connection; check the source and device.	Device-specific Sources
4	MP (DO, IO-Link)	Control, detection or configuration connection; check the source and device.	Device-specific Sources

Sources (1)

S809 · ifm electronic · PQS812 Pressure sensor for pneumatics — PQ-010-KHR18-MFPKG/AS/
PQS812-01 EN-GB, 22.01.2026 · PDF p.4, Electrical connection (M8 A coding,4 contacts), Connection schematic and Electrical connection - plug table

SICK MPS-M position sensor male M8 A-coded 4-pin

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

View and evidence limits

SICK MPS-M male M8 connector, numbered-contact convention from Table 3. No solder-side or complementary-socket mirror inferred.

P249 M8 A-coded 4-position — **Partial**: different named sensors — A's ifm PQS812 has 1 L+, 2 digital OUT, 3 L-, 4 multifunction output/IO-Link. B's SICK MPS-M has 1 supply, 2 analog UOUT, 3 return, 4 IO-Link. Supply/return positions align; output type and behavior are device-specific. Different manufacturers, not conflicting accounts of one device.
This is only the SICK MPS-M sensor application. Other M8 A-coded devices and their voltages or output functions are unverified.
Table 3 provides a numbered male-connector diagram without an explicit mating/rear viewing-side label in the inspected page.

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

SICK MPS-M position sensor male M8 A-coded 4-pin — source-scoped contact map
Pin	Signal	What it does	Status
1	+ (L+)	Control, detection or configuration connection; check the source and device.	Device-specific Sources
2	UOUT	Control, detection or configuration connection; check the source and device.	Device-specific Sources
3	- (M)	Control, detection or configuration connection; check the source and device.	Device-specific Sources
4	IO-Link	Control, detection or configuration connection; check the source and device.	Device-specific Sources

Sources (1)

S810 · SICK · MPS-M Position sensor Operating Instructions
8028183.1KND/2023/08/22 · p. 17, §6.2.1, Table 3: Pin assignment for male connector, M8, A-coded, 4-pin; §6.3 supply requirements; p. 11, §3.4.3 Position output, analog output 0–10 V for position measurement

Unknowns stay unknown.

A-coding and contact numbering do not by themselves establish protocol, wire color, voltage/current rating or connected-device support.
No fabrication dimensions or mating tolerances are published in this profile.

Your next step

Use the detail without guessing past its limits.

Read the connector field note Recognition clues and practical checks.Work through a connection Keep exact equipment and cable requirements separate.

Source trail

Claims and sources

C249Asource checked

Phoenix Contact identifies part 1453481 as a four-position M8 connector with A-coding.

Phoenix Contact · M8 A-coded 4-position device connector ↗
Product properties · Identification/reference scope only. V43 does not convert this source into a universal pinout, fabrication drawing, electrical approval, protocol guarantee or end-to-end compatibility verdict.

C249Bsource checked

Phoenix Contact’s 2026 circular-connector overview shows four-position M8 A-coded male and female face views with contact positions designated 1 through 4.

Phoenix Contact · M5 to M12 circular connectors — pin assignments and wire colors ↗
Product overview 2026, pages 70–71: M8/M12 male/female face views and data assignments · Face-view numbering/coding applies only to the documented connector forms. V44 does not infer wire colors, protocol support or electrical ratings for arbitrary products unless explicitly claimed.

C808Qsource checked

ifm PQS812 pressure sensor plug: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

ifm electronic · PQS812 Pressure sensor for pneumatics — PQ-010-KHR18-MFPKG/AS/ ↗
PDF p.4, Electrical connection (M8 A coding,4 contacts), Connection schematic and Electrical connection - plug table · Source scope and unresolved evidence are preserved in the engineering variant.

C808Rsource checked

SICK MPS-M position sensor male M8 A-coded 4-pin: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

SICK · MPS-M Position sensor Operating Instructions ↗
p. 11, §3.4.3 Position output, analog output 0–10 V for position measurement; p. 17, §6.2.1, Table 3: Pin assignment for male connector, M8, A-coded, 4-pin; §6.3 supply requirements · Source scope and unresolved evidence are preserved in the engineering variant.

4 source records support this profile. No independent engineering review or hardware validation is claimed.

Evidence behind this page

Scope first. Source second. Approval separate.

4 linked sources · 4 scoped claims · 0 sources with inspection/access flags.

Page scope: Original V44 contact-designation schematic; not to scale and not a fabrication or wiring drawing.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-04. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 4 source scopes, access limits and dates

S269 · M8 A-coded 4-position device connector

Phoenix Contact · Manufacturer / product-owner domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Identifies an M8 A-coded, four-position device-side connector; V43 uses only coding/count/form facts.

Not established / limitations: Identification/reference scope only. V43 does not convert this source into a universal pinout, fabrication drawing, electrical approval, protocol guarantee or end-to-end compatibility verdict.

Locator: Product properties

S289 · M5 to M12 circular connectors — pin assignments and wire colors

Phoenix Contact · Manufacturer / product-owner domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Primary manufacturer overview used for bounded M8 A-coded, M8 D-coded, M12 A-coded and M12 B-coded position numbering; the M8 D-coded PROFINET assignment is also stated explicitly.

Not established / limitations: Face-view numbering/coding applies only to the documented connector forms. V44 does not infer wire colors, protocol support or electrical ratings for arbitrary products unless explicitly claimed.

Locator: Product overview 2026, pages 70–71: M8/M12 male/female face views and data assignments

S809 · PQS812 Pressure sensor for pneumatics — PQ-010-KHR18-MFPKG/AS/

ifm electronic · Unclassified publisher domain · inspected 2026-10-21 · due 2027-01-19

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: PDF p.4, Electrical connection (M8 A coding,4 contacts), Connection schematic and Electrical connection - plug table

S810 · MPS-M Position sensor Operating Instructions

SICK · Unclassified publisher domain · inspected 2026-10-21 · due 2027-01-19

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: p. 11, §3.4.3 Position output, analog output 0–10 V for position measurement; p. 17, §6.2.1, Table 3: Pin assignment for male connector, M8, A-coded, 4-pin; §6.3 supply requirements

Trace 4 claims to their source records

C249A · P249

Phoenix Contact identifies part 1453481 as a four-position M8 connector with A-coding.

Claim scope: V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.

Source links: S269 · Evidence trail → (private workspace)

C249B · P249

Phoenix Contact’s 2026 circular-connector overview shows four-position M8 A-coded male and female face views with contact positions designated 1 through 4.

Claim scope: V44 contact-designation/orientation reference only; no universal signal assignment, wire color, voltage/current rating or device compatibility is inferred.

Source links: S289 · Evidence trail → (private workspace)

C808Q · P249

ifm PQS812 pressure sensor plug: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S809 · Evidence trail → (private workspace)

C808R · P249

SICK MPS-M position sensor male M8 A-coded 4-pin: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S810 · Evidence trail → (private workspace)

Prepare this page for review →Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.