Weidmüller BL-I/O 3.50/30LR PNP LED SN BK BX Connector Guide
The Weidmüller BL-I/O 3.50/30LR PNP LED SN BK BX is a specialized female PCB connector for decentralised I/O electronics that integrates LED-based functionality in a PNP configuration. For industrial designers and automation engineers, that matters because it brings connection and status-oriented functionality together in one compact interface platform.
What Makes This PNP LED Version Different
Unlike the standard BL-I/O connector, this version is optimized for applications where integrated electronic indication is useful. The PNP LED design supports I/O architectures where signal state visibility and board-space efficiency are both operational priorities. In modern control systems, that can improve diagnostics and simplify panel-level readability.
Technical Overview
The connector uses a 3.50 mm pitch and provides 30 poles in a 180° outlet format. It employs PUSH IN with actuator technology and supports conductor sizes from 0.2 to 1.5 mm². According to the datasheet, it is rated at 200 V and 2.2 A under IEC product data, and 50 V / 5 A under UL approval data, with AWG 24 to AWG 16 supported.
Integrated Electronics and PCB Efficiency
One of the most valuable aspects of the Weidmüller BL-I/O 3.50/30LR PNP LED SN BK BX is that it combines connection functionality with integrated electronics. Weidmüller specifically highlights this as a way to create more space on the circuit board. In compact automation devices, that kind of integration can make a meaningful difference in layout strategy.
Weidmüller BL-I/O 3.50/30LR Why Engineers Use It
In decentralised I/O systems, the ability to combine dense connectivity with visual or functional indication supports easier diagnostics and more efficient maintenance. The 30-pole format also reduces the need for multiple separate connectors, which can simplify wiring harness design and reduce interface complexity.
Best-Fit Applications
This connector is well suited to automation modules, signal-rich I/O assemblies, industrial interface boards, and equipment where a PNP-oriented LED-enabled connector arrangement provides practical value.
For more information about Weidmüller, it is useful to compare this product with the standard and NPN LED variants in the same series.
Weidmüller BL-I/O 3.50/30LR FAQ
What does PNP LED mean in this product?
It indicates that the connector includes integrated electronics arranged for PNP-oriented I/O applications with LED-related functionality.
What are the main ratings?
It is listed at 200 V / 2.2 A under IEC data and 50 V / 5 A under UL data.
What wire sizes are supported?
The connector supports 0.2 to 1.5 mm² and AWG 24 to AWG 16 depending on the standard referenced.
Why choose this over the standard BL-I/O version?
This version is useful when integrated indication and compact electronics integration are important in the I/O design.
Where is it commonly used?
It is commonly used in decentralised automation, interface electronics, and compact industrial I/O assemblies.