Black Box ACX1MT-HDMI-C Modular KVM Extender Transmitter

Overview

The Black Box ACX1MT-HDMI-C is the transmitter module in Black Box's ACX modular KVM extender platform — purpose-built for integrators who need to separate a single-monitor HDMI workstation from its host computer across a structured CATx network. This is the transmit-side unit only; it pairs with a compatible ACX receiver module to form a complete extension link. If you are comparing Black Box KVM extenders or evaluating the full ACX platform, the modular architecture is the key reason to choose this line: you mix and match transmitter and receiver cards to fit your exact video, USB, and audio requirements without buying capability you don't need.

The ACX1MT-HDMI-C carries HDMI video and dual USB-HID signals over a single Gigabit Ethernet CATx channel — meaning you run one cable from the transmitter at the source computer to the receiver at the operator console. For broadcast control rooms, command centers, industrial workstations, or healthcare environments where the CPU must be secured in a rack or locked closet while the operator works at a remote desk, this transmitter handles the local end of that link. Browse the full KVM extender category to compare single-monitor and multi-monitor configurations.

Key Features

• HDMI Video Interface: Carries HDMI signals from the source computer to the transmitter module — no DisplayPort or VGA adapters required on the CPU side. If your workstation or server outputs HDMI natively, this transmitter connects directly without a conversion step.
• Dual USB-HID Ports: Two USB-HID connections at the transmitter end let you attach a keyboard and mouse at the remote console side through the extension link. HID-only USB means the path is optimized for control devices — not bulk USB storage or webcams — which is appropriate for most KVM console deployments where input device reliability matters more than generic USB passthrough.
• 1G (Gigabit Ethernet) Transport: The extension signal travels over a single Gigabit Ethernet link, using standard CATx structured cabling already installed in most commercial buildings. This eliminates the need for proprietary cable runs and lets you reuse existing infrastructure — a significant factor in retrofit installations where pulling new cable is expensive or disruptive.
• Single CATx Channel (1 CA): One cable from transmitter to receiver carries the full video and USB-HID payload. Fewer cables mean a cleaner rack, fewer potential failure points, and faster installation. For KVM switching deployments or matrix configurations, confirm the cable distance limitations with Black Box's ACX receiver specifications before finalizing your run lengths.
• Modular Architecture: The ACX1MT-HDMI-C is a module, not a standalone extender. This matters for budgeting and installation planning — the transmitter card slots into a compatible ACX chassis or enclosure. Verify chassis compatibility with Black Box's ACX platform documentation before ordering. If you need a complete out-of-box kit, look at bundled ACX transmitter/receiver pairs in the same family.
• Single-Monitor Configuration: Designed for one-display setups. If your operator console runs dual or quad monitors, you will need a multi-head ACX transmitter variant. Single-monitor is the right fit for focused operator positions: security workstations, industrial HMIs, medical imaging review stations, or any position where one display is the workflow standard.

Integration and Compatibility

The ACX1MT-HDMI-C (often searched as ACX1MT HDMI C) is designed to integrate within Black Box's ACX modular KVM platform. Pairing requires a compatible ACX receiver module at the remote end. The 1G transport over CATx is compatible with standard Gigabit network infrastructure — consult Black Box's ACX platform documentation for supported cable categories, maximum run lengths, and chassis requirements. For enterprise deployments, review KVM matrix switching solutions that may incorporate ACX modules into a larger switching fabric. For PoE-powered infrastructure planning alongside your KVM deployment, see the PoE switch category.

Frequently Asked Questions

Q: Is the ACX1MT-HDMI-C a complete KVM extender kit, or do I need additional hardware?

A: The ACX1MT-HDMI-C is the transmitter module only. A complete extension link requires a compatible ACX receiver module at the remote/operator end, plus a compatible ACX chassis or enclosure. Confirm chassis and receiver compatibility with Black Box's ACX platform documentation before ordering.

Q: What video interface does the ACX1MT-HDMI-C use?

A: The ACX1MT-HDMI-C uses HDMI for the video connection at the source computer side. It is a single-monitor transmitter — one HDMI input, one display extended to the remote end.

Q: How many USB ports does the ACX1MT-HDMI-C support?

A: The transmitter provides two USB-HID connections, intended for keyboard and mouse. USB-HID is optimized for input control devices, not bulk USB storage or generic USB device passthrough.

Q: What cable type does the ACX1MT-HDMI-C use for the extension link?

A: The ACX1MT-HDMI-C transmits over a single Gigabit Ethernet (1G) CATx channel. This allows use of standard structured cabling infrastructure. Consult Black Box's ACX platform specifications for the supported cable category and maximum run length for your installation.

Q: Can the ACX1MT-HDMI-C be used in a multi-monitor workstation setup?

A: No — the ACX1MT-HDMI-C is a single-monitor transmitter. For dual or multi-display operator consoles, a multi-head ACX transmitter variant is required. Verify the correct model in the ACX product family before specifying.

Karl Wilson

The ACX1MT-HDMI-C is the piece most integrators overlook when they spec a KVM extension project — the transmitter module is only half the solution, and getting the chassis pairing wrong is a common and costly mistake. This transmitter handles HDMI video plus two USB-HID channels over a single Gigabit CATx run, which keeps the cable count at the source end clean and re-uses the structured cabling that's already in the building.

Technical Highlights:

• HDMI Transmit Interface: Direct HDMI connection at the source computer — no signal conversion required on CPU-side hardware that already outputs HDMI natively. Eliminates an adapter in the chain and one more potential failure point.
• Dual USB-HID: Two HID ports cover the standard keyboard-and-mouse requirement at the remote console. The HID constraint is intentional — it keeps USB traffic lean and deterministic, which matters in latency-sensitive control environments like broadcast or process control.
• 1G CATx Transport: One Gigabit Ethernet channel carries the complete payload. In a retrofit scenario, this means you are running on infrastructure the building already has — no specialized fiber or proprietary cable required at the transmitter end.

Deployment Considerations:

• This is a module, not a standalone unit. Confirm ACX chassis compatibility and have the matched receiver module on the same purchase order — arriving on-site with one half of the extension link is a common scheduling failure on installs.
• USB-HID only means no generic USB passthrough — if the operator position needs a USB smartcard reader, USB audio device, or other non-HID peripheral at the remote end, you need an ACX variant with transparent USB support, not this transmitter.

The ACX1MT-HDMI-C is the right transmitter for single-display operator positions in secured-CPU environments — control room consoles, locked-rack medical workstations, or broadcast edit suites where the computer lives in a equipment room and the operator sits at a clean desk with just a monitor, keyboard, and mouse.