P249 / Network / Connector

M8 A-coded 4-position connector

M8 A-coded circular connectors appear in compact industrial signal applications; the 4-position A-coded form must be distinguished from D-coded data variants.

Also called M8 A-coded M8 A code 4-pin M8 A-coded M8 sensor connector

The M8 threaded shell does not identify coding or function. A- and D-coded inserts are separate keyed forms.

Look for

Confirm M8 thread size, A-coding and four-position insert from the exact component or cable documentation before assigning signal use.

Claim inspection dates: 2026-10-06, 2026-10-11 · Independent review pending

M8 A-coded 4-position connector: three-quarter view. Computer-generated illustration, not a photograph.

M8 A-coded 4-position connector: mating face. Computer-generated illustration, not a photograph.

Image inspection / P249

See the view. Check its scope.

1 registered view for this reference. Different part examples are not automatically mates; all remain not to scale and independently unapproved.

P249 / Source-observed physical study

Phoenix Contact 1453481

Oblique exterior, connection end at left; simplified contact features · Device receptacle

Not to scale. Technical and rights review pending.

Inspect view & provenance

Network notes / Industrial / P249

Is this M8 item a cable end or a device connector?

FIELD NOTES 05

The illustrated 1453481 is a rear-mounted, four-position A-coded male device connector with free individual leads. It is a different procurement and installation role from a finished network patch lead.

Identify first

Read the part and the device.

The mounting hardware and separate leads help identify the pictured role; use the part number for the A coding and unshielded designation.

Still unresolved

Keep this requirement open.

The leads’ functions, device circuit, installation method, Ethernet support and cross-family mating are not established here.

Documented support · named example only

Does 1453481 describe a rear-mounted device connector with free leads?

Yes; the source identifies a rear-mounted A-coded M8 male device connector with individual leads.

Boundary. No wire assignments, assembly approval or ready-made Ethernet link is provided.

Next check. Match the device mounting and circuit documentation.

S502 · C249C (private workspace)

Not established · named example only

Can the four-position M8 A and M8 D examples be substituted?

No substitution is established by the cited family observations.

Boundary. The 1323169 page could not be refreshed; shared position count is not mating evidence.

Next check. Acquire exact current coding and mating-part documentation.

S270 · S502 · C250A (private workspace) · C249C (private workspace)

Before choosing the cable or component

Determine whether you need a device-mounted connector, a cable end or a complete cable.
Confirm the exact M8 coding and male/female role in the device documentation.
Obtain the manufacturer’s approved assembly and circuit documentation rather than copying lead colors.

Read the evidence and its scope · 2 observations

C249A (private workspace) — Phoenix Contact identifies part 1453481 as a four-position M8 connector with A-coding.

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

S269

C249C (private workspace) — Phoenix Contact 1453481 is a straight four-position A-coded M8 male device connector for rear mounting, with individual leads; the product listing calls it unshielded. It is not described as a ready-made Ethernet patch cable.

V121 named-product or explicitly scoped manufacturer distinction only; no wiring instruction, independent engineering approval or end-to-end compatibility guarantee.

S502

Source interpretation is not independent engineering review, hardware testing, wiring advice or a public-release approval.

Inspect the named exterior · Phoenix Contact 1453481

M8 A-coded rear-mount male device connector; Oblique exterior, connection end at left; simplified contact features. Manufacturer product photograph 241274 inspected 11 October 2026. Original interpretation of the named exterior; not a measured drawing or a copied photograph.

Original source-scoped paraphrase and qualitative vector interpretation; no manufacturer raster artwork republished. Independent technical and rights review remains pending.

S502 · Read the network notes →

The useful distinction

Recognize it. Then verify it.

M8 A-coded circular connectors appear in compact industrial signal applications; the 4-position A-coded form must be distinguished from D-coded data variants. [C249A]

Phoenix Contact 1453481 is a straight four-position A-coded M8 male device connector for rear mounting, with individual leads; the product listing calls it unshielded. It is not described as a ready-made Ethernet patch cable. [C249C]

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 →

Bounded facts, visible unknowns

Specifications and limits

M8 A-coded 4-position connector facts and limitations
Documented identification	4-position/contact recognition fact in the cited implementation. [C249A]
Mechanical dimensions	No independently reviewed mechanical drawing in V43; do not use this page for fabrication, fit testing or tolerance work.
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.

Use the source-backed form or position count only for identification. Resolve ratings, protocol, direction, wiring, cable construction and exact device support from the relevant equipment and component documentation.

Before you connect

What to check

Identify the exact connector family and variant from the equipment or cable documentation.
Keep shape, contact count, protocol, electrical rating and device support as separate facts.
Do not force, rewire or adapt a connector from this recognition record; resolve the remaining requirements first.

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 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

What is not established

This field note does not approve a connection, adapter, cable assembly, rewiring scheme or fabricated part. It intentionally omits unsupported pin assignments and mechanical tolerances.

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 ↑

C249ASource checked · pending review

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

Phoenix Contact · M8 A-coded 4-position device connector ↗

Locator: Product properties
Access: public page. 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.

S269: full source recordInspect review dependencies →

Claim scope: V43 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.. Next review due 2027-01-04.

Back to first citation ↑

C249CSource checked · pending review

Phoenix Contact · Phoenix Contact 1453481 — rear-mounted M8 device connector ↗

Locator: Product description; mounting type; product properties; connection data; photograph 241274
Access: public page. Named rear-mounted A-coded male device connector and free leads; no inferred wire functions or network protocol. No raw HTML or manufacturer image archive is represented as retained.

S502: full source recordInspect review dependencies →

Claim scope: V121 named-product or explicitly scoped manufacturer distinction only; no wiring instruction, independent engineering approval or end-to-end compatibility guarantee.. Next review due 2027-01-09.

Suggest a correction to this field note →

Put this field note to work.

Add to discovery trayRecord an unsaved candidate

Compare look-alikes: M8 A-coded versus D-coded · M8, M12 and M23 circular families

Candidate selection does not confirm the identity or capabilities of your physical item.

Evidence behind this page

Scope first. Source second. Approval separate.

2 linked sources · 2 scoped claims · 0 sources with inspection/access flags.

Page scope: catalogue_expansion_v43

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 2 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

S502 · Phoenix Contact 1453481 — rear-mounted M8 device connector

Phoenix Contact · Manufacturer / product-owner domain · inspected 2026-10-11 · due 2027-01-09

Within inspection window

Scoped support: Named rear-mounted A-coded male device connector and free leads; no inferred wire functions or network protocol.

Not established / limitations: Named rear-mounted A-coded male device connector and free leads; no inferred wire functions or network protocol. No raw HTML or manufacturer image archive is represented as retained.

Locator: Product description; mounting type; product properties; connection data; photograph 241274

Trace 2 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)

C249C · P249

Claim scope: V121 named-product or explicitly scoped manufacturer distinction only; no wiring instruction, independent engineering approval or end-to-end compatibility guarantee.

Source links: S502 · 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.