Xmost M12 B-coded female rear mount PCB socket connects an external PROFIBUS cable assembly to the circuit board inside an industrial device. The female B-coded interface mates with a compatible male connector, while straight rear contacts provide PCB dip-solder termination.
This rear fastened panel connector suits enclosures designed around a rear mount installation. Its outline differs from the front mount version, so the rear mount drawing should be used when positioning the panel opening and circuit board.
Grounded and ungrounded constructions are available, together with shielded or unshielded options. These choices allow the M12 PROFIBUS panel socket to be specified for the equipment’s grounding and shielding arrangement.
Key Features
- Rear fastened installation: For equipment housings designed for a rear mount M12 socket.
- B-coded female interface: Accepts matching 5-pin M12 B-coded male fieldbus connectors.
- PCB insertion contacts: Supports direct board termination through dip soldering.
- PG9 or M16 × 1.5 mounting: Two panel thread options for different enclosure designs.
- Grounding and shielding options: Specify grounded/ungrounded construction and shielded/unshielded execution.
- 4 A / 60 V ratings: Listed electrical limits for this 5-pin PCB connector.
Product Dimensions

[Insert the female rear mount outline drawing and corresponding panel cut-out drawing from page 6.]
Illustrated PG9 Rear Mount Version — Dimensions in mm
| Item | Drawing Value |
|---|---|
| Mating thread | M12 × 1.0 |
| Panel mounting thread shown | PG9 |
| Body dimension shown, excluding PCB contacts | 20 |
| Upper axial section | 8 |
| Flange section | 2 |
| Lower axial section | 9 |
| Upper wrench size | SW17 |
| Lower wrench size | SW13.4 |
| Rear contact section | 6 |
| Contact tip section | 3 |
| PCB contact diameter, 5-pin version | Ø1.0 |
Needle Arrangement (Front View)

[Insert the B-coded 5-pin female needle arrangement diagram from page 6.]
The diagram shows the female mating-face view with contacts numbered 1–5. Match the contact arrangement to the external male connector and follow the equipment schematic for PROFIBUS signal assignments.
Product Specifications
| Parameter | Specification |
|---|---|
| Product type | M12 B-coded female rear mount PCB socket |
| Application type | PROFIBUS / industrial fieldbus |
| Mounting | Rear fastened |
| Contact count | 5 pins |
| Termination | PCB dip soldering |
| Standard listed | IEC 61076-2-101 |
| Rated current | 4 A |
| Rated voltage | 60 V |
| Grounding options | Grounded / ungrounded |
| Shielding options | Shielded / unshielded |
| Mating thread | M12 × 1.0 |
| Panel mounting threads | PG9 / M16 × 1.5 |
| Insulation resistance | ≥100 MΩ |
| Contact resistance | ≤5 mΩ |
| Recommended coupling torque | 0.4 N·m |
| Maximum coupling torque | 0.8 N·m |
| Temperature range, flexible use | −25°C to +80°C |
| Temperature range, static use | −40°C to +80°C |
| Wire gauge listed in catalogue | 0.34 mm² / AWG22 |
| Protection ratings listed | IP67 / IP68 |
| Pollution degree | 3 |
| Insulator materials listed | PA66+GF / TPU+GF |
Applications
- PROFIBUS communication devices: Provides an external fieldbus cable connection to internal PCB electronics.
- Remote I/O modules: Integrates a B-coded panel socket into distributed automation equipment.
- Industrial gateways: Offers a threaded cable interface for devices incorporating a compatible PROFIBUS connection.
- Machine control housings: Suits rear fastened panel assemblies with PCB dip-solder termination.
Selection and Ordering
| Selection Item | Available Choices |
|---|---|
| Interface | M12 B-coded female, 5-pin |
| Mounting style | Rear mount |
| Panel mounting thread | PG9 / M16 × 1.5 |
| Termination | PCB dip soldering |
| Grounding | Grounded / ungrounded |
| Shielding | Shielded / unshielded |






