Introduction
When building automation projects with Raspberry Pi, reliable connections are critical. At Sequent Microsystems, we use pluggable connectors across our HATs to make wiring easier, safer, and more flexible. These connectors allow users to quickly connect and disconnect wires without soldering, ensuring secure and professional-grade installations.
What Are Pluggable Connectors?
Pluggable connectors are modular, detachable terminals designed for easy wiring. Instead of fixed solder joints, they use a spring or screw terminal block that can be detached from the board. This means:
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Faster assembly and maintenance
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Reduced risk of wiring errors
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Flexibility when swapping boards in and out of a Raspberry Pi stack
For automation systems that require frequent changes or maintenance, pluggable connectors are far more practical than fixed terminals.
Why Sequent Microsystems Uses Pluggable Connectors
We design our HATs for home automation, building automation, and industrial automation, where reliability and speed of installation matter. Pluggable connectors ensure that:
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Field wiring is simplified – connect sensors, relays, or actuators with no soldering.
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Service is easy – remove one HAT and replace it without disturbing the wiring.
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Safety is improved – firm screw or spring-loaded retention ensures wires stay in place, even in vibration-heavy environments.
Connector Layout on Sequent HATs
Each Sequent Microsystems HAT routes I/O signals through clearly labeled pluggable connectors:
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Analog Inputs & Outputs – 0–10V, 4–20mA, thermistors, thermocouples, and RTDs
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Digital Inputs & Outputs – optically isolated inputs, relays, MOSFETs, and SSRs
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Communication Ports – RS485, RS232, CAN, 1-Wire
Because the connectors are modular, users can disconnect only the section they need to modify, reducing downtime and errors.
Advantages Over Traditional Connectors
Compared to fixed headers or soldered joints, pluggable connectors offer:
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Scalability – quickly add or remove HATs in a Raspberry Pi stack
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Reusability – no damage when disconnecting wires
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Time savings – especially important for installers and system integrators
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Professional look – neat, consistent wiring for production-ready systems
Replacement Plugs for Sequent Microsystems HATs
Every Sequent Microsystems HAT is shipped with the required pluggable connector plugs. However, some customers may need additional plugs for expansion, spares, or custom wiring projects. To assist with sourcing, we’ve compiled a list of compatible replacement plugs from well-known manufacturers such as Phoenix Contact, Wurth Elektronik, and Molex.
⚠️ Disclaimer: While these part numbers are widely available and match the general specifications of the connectors we use, Sequent Microsystems has not independently verified the compatibility of each plug with our boards. Customers should confirm fit and functionality before use in critical applications.
The lists below provide replacement options organized by pin count for easier reference.