QSC QIO-S4 – Q-SYS 4-Port Network Serial Expander (RS-232/422/485)
QSC QIO-S4 – Q-SYS 4-Port Network Serial Expander (RS-232/422/485) is backordered and will ship as soon as it is back in stock.
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QSC QIO-S4 – Q-SYS 4-Port Network Serial Expander (RS-232/422/485)
Product Overview
The QSC QIO-S4 is a Q-SYS network serial expander that brings RS-232/422/485 device control onto the Q-SYS network. As a Q-SYS network serial port expander, it lets a Core send and receive serial commands to displays, projectors, matrix switchers, and other controllable devices in a conference room or boardroom over standard Ethernet, eliminating long serial cable runs to the rack. It is natively managed in Q-SYS Designer Software, making serial control a configurable part of AV system integration.
Product Description
The QIO-S4 provides four bi-directional RS-232 serial ports, one of which is also compatible with RS-422 and RS-485, so a single expander can control multiple serial devices with mixed protocol requirements. Like the rest of the QIO platform, it connects to the Q-SYS network over standard gigabit Ethernet as a Q-LAN device and is powered by PoE or 24 VDC, with daisy-chainable power and pass-through Ethernet so multiple QIO peripherals can share a switch port. The compact quarter-rack-width chassis can be surface-mounted under a table or on a wall, or rack-mounted with the optional QIO-RMK tray. Native integration into Q-SYS Designer Software means serial strings are configured and triggered within the same design that handles audio and control.
Key Features
- Four Bi-Directional Serial Ports — Four RS-232 ports, with one port also supporting RS-422 and RS-485, control multiple serial devices from a single expander.
- Native Q-SYS Integration — The expander appears in Q-SYS Designer Software, so serial control is configured alongside audio and other control in one design.
- Network-Distributed Control — Serial control runs over standard gigabit Ethernet as a Q-LAN device, placing ports near the equipment they control.
- Flexible Power — PoE or 24 VDC operation with daisy-chainable power and pass-through Ethernet.
- Compact Mounting — A quarter-rack-width chassis supports under-table or on-wall surface mounting and an optional 19-inch rack tray.
Typical Applications
- Conference room and boardroom display, projector, and switcher control
- Training rooms and multi-purpose rooms
- Government and commercial meeting spaces
Technical Specifications
| Specification | Detail |
|---|---|
| Serial Ports | 4 x bi-directional RS-232; one port also RS-422/RS-485 compatible |
| Network | Q-LAN over standard gigabit Ethernet; RJ-45 |
| Power | PoE or 24 VDC; daisy-chain power in/out |
| Mounting | Quarter-rack width; under-table, on-wall, or optional 19-inch rack tray |
| Management | Native Q-SYS Designer Software integration |
Frequently Asked Questions
What protocols does the QIO-S4 support? It offers four bi-directional RS-232 ports, and one of those ports additionally supports RS-422 and RS-485 for devices that require those standards.
How does it connect to Q-SYS? The expander is a native Q-SYS peripheral managed in Q-SYS Designer Software, connecting over standard gigabit Ethernet as a Q-LAN device.
How is it powered? It runs on PoE or 24 VDC, and DC power can be daisy-chained across multiple QIO units.
How does it mount? The quarter-rack-width chassis supports under-table or on-wall mounting, or rack mounting with the optional QIO-RMK tray.
What about warranty and support? The QIO-S4 is covered under QSC warranty terms; contact Creation Networks support for Q-SYS control design and AV integration assistance.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
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