FIELD GUIDESource-led reference
Port & Cable

E252 · Contact designations

M12 B-coded 5-position connector engineering reference

Phoenix Contact manufacturer overview provides male/female face-view numbering for the five-position M12 B-coded form.

Open field noteSource trail

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

M12 B-coded 5-position contact-designation reference original orientation schematic
Original V44 contact-designation schematic; not to scale and not a fabrication or wiring drawing.

Orientation

How to read this profile

Contact labels 1–5 follow the documented male/female face-view numbering; V44 keeps protocol-specific wiring separate.

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 contacts5S272Source-backed nominal position/contact count: 5.
Positions / cavity span5 (Claim C252A); 5 (Claim C252B); 5 (Claim C252C); 5 (Phoenix Contact 1543553)S272 · S289 · S272 · S272Source-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; the B-coded form is not assigned a universal protocol or wire map by this claim. Exact assembled T-distributor and end roles, not a universal M12 form, Ethernet branch adapter or authorized wiring topology. Phoenix Contact 1543553. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Connector roleT-distributor: straight M12 plugs at connections 1/2; straight M12 socket at connection 3 (Phoenix Contact 1543553)S272Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1543553. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Keying / polarizationB coding (Phoenix Contact 1543553)S272Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1543553. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
ManufacturerPhoenix Contact (Phoenix Contact 1543553)S272Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1543553. Named primary-source example only. Identification facts do not certify mating, electrical compatibility, fabrication or powered use.
Exact part / implementationPhoenix Contact 1543553 (Phoenix Contact 1543553)S272Source-scoped examples are separate; select the exact variant and measured axis. Phoenix Contact 1543553. 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, Contact gender / arrangement, Mounting, 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
  • B-coding and contact numbering do not make every implementation PROFIBUS, DeviceNet or another specific bus.
  • No fabrication dimensions, bus termination or cable-electrical requirements are published in this profile.
Report a correction to these facts →

Contact designations

Contact reference

Source-scoped contact assignments; read the orientation and evidence before using numbers
ContactDocumented role / designationEvidence
1Designated contact position 1[C252B]
2Designated contact position 2[C252B]
3Designated contact position 3[C252B]
4Designated contact position 4[C252B]
5Designated contact position 5[C252B]

Unknowns stay unknown.

  • B-coding and contact numbering do not make every implementation PROFIBUS, DeviceNet or another specific bus.
  • No fabrication dimensions, bus termination or cable-electrical requirements 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

C252Asource checked

Phoenix Contact identifies part 1543553 as a five-position M12 T-connector with B-coding for PROFIBUS DP.

Phoenix Contact · M12 B-coded PROFIBUS DP T-connector ↗
Product properties and interfaces · 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.

Back to first citation ↑
C252Bsource checked

Phoenix Contact’s 2026 circular-connector overview shows five-position M12 B-coded male and female face views with contact positions designated 1 through 5.

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.

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

Evidence behind this page

Scope first. Source second. Approval separate.

2 linked sources · 2 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 2 source scopes, access limits and dates

S272 · M12 B-coded PROFIBUS DP T-connector

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

Within inspection window

Scoped support: Identifies a five-position, B-coded M12 PROFIBUS DP implementation.

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 and interfaces

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

Trace 2 claims to their source records

C252A · P252

Phoenix Contact identifies part 1543553 as a five-position M12 T-connector with B-coding for PROFIBUS DP.

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: S272 · Evidence trail → (private workspace)

C252B · P252

Phoenix Contact’s 2026 circular-connector overview shows five-position M12 B-coded male and female face views with contact positions designated 1 through 5.

Claim scope: V44 contact-designation/orientation reference only; the B-coded form is not assigned a universal protocol or wire map by this claim.

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

Prepare this page for review → (private workspace)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.