The Keysight E2261A Quad RS-232 Interface M-Module is engineered to deliver reliable serial communication in demanding environments. Featuring four independent RS-232 channels, it enables simultaneous communication with multiple serial devices. Its M-Module form factor ensures easy integration into modular systems, making it suitable for industrial automation, data acquisition, and embedded control applications. The module supports standard RS-232 signaling, ensuring compatibility with a wide range of serial peripherals.

Keysight / Agilent / HP E2261A Quad RS-232 Interface M-Module
The Keysight E2261A is a Quad RS-232 Interface M-Module, designed for providing four independent RS-232 serial communication channels. It is an M-Module, offering a compact and robust solution for adding serial connectivity to industrial and embedded systems. This interface module facilitates data transfer and communication with various serial devices.
Product Condition & Availability
Keysight / Agilent / HP E2261A Quad RS-232 Interface M-Module is in excellent working condition and has been thoroughly tested for performance and reliability. We offer both new and professionally refurbished options, depending on availability and customer preference.
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Integrated Solutions & Deployment Support
Beyond individual products, Aumictech provides end-to-end solutions for manufacturing line deployment and test station setup. Our team can assist with system integration, configuration, and equipment selection tailored to your production requirements.
Trusted Industry Experience
With over a decade of experience, Aumictech is a recognized leader in RF and optical test equipment sales and services. All units are supported by our in-house calibration and repair facility based in Downingtown, PA, ensuring technical reliability and long-term value.
Customer Commitment
We’re committed to exceptional customer service, offering a 15-day return or replacement (ROR) policy for peace of mind. Our team is always available to assist with pre- and post-sale support.
Fast Shipping & Flexible Payments
We offer rapid global shipping through FedEx, UPS, and DHL, with most orders dispatched within 1–3 business days. Multiple secure payment options are available, including PayPal, ACH, wire transfers, and major credit cards.
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