Kramer RC-74DL(B) 12–Button Ethernet and KNET™ Control Keypad with Knob and Displays (US, Black)

Product Overview

The Kramer RC-74DL is a 12-button in-wall control keypad with volume knob and LCD displays, designed for conference rooms, boardrooms, and auditoriums where a single, comprehensive room controller is needed at the wall. It connects via Ethernet to Kramer's Site-CTRL platform for network-managed AV control, via KNET to Kramer master room controllers and auxiliary keypads, and includes RS-232, RS-485, GPI/O, relay, and IR ports for direct device control — making it equally capable as a standalone room controller or as part of a larger multi-zone system. AV integrators use the RC-74DL in complex multi-device spaces where users need tactile button control over AV routing, displays, lighting, shading, and audio volume from a single, elegantly mounted keypad. It mounts in standard 3-gang US wall junction boxes and is programmed via Kramer K-Config software.

Product Description

The RC-74DL's 12 RGB-backlit buttons are grouped into three sections, each with a dedicated blue LCD display showing programmable labels — providing users with clear, context-aware labeling for every button function. Custom-labeled, removable button caps allow integrators to create polished, end-user-friendly interfaces without visible blank keys. The bidirectional rotary digital volume knob with 5 LED indicators provides intuitive audio level adjustment directly from the keypad. Three RS-232 ports on terminal blocks enable direct serial control of displays, projectors, and processors alongside the KNET and Ethernet connections. Two IR emitter outputs and one built-in IR receiver (for command learning) extend control to IR devices throughout the space. Four relay outputs on terminal blocks handle contact closure for projection screens, motorized shading, and blinds. Two GPI/O ports support sensors, door locks, and occupancy-based automation. A mini USB port serves configuration file uploading, KNET ID assignment, and device power during programming. The optional keypad lock-out feature prevents unauthorized tampering during scheduled events.

Key Features

• 12 RGB-Backlit Buttons with LCD Labels — Three groups of four buttons, each with a dedicated 8-character LCD display for programmable, context-aware labeling.
• Volume Knob with LED Bar — Bidirectional rotary digital knob with 5 LED indicators for visual audio level feedback.
• Ethernet + KNET + RS-232 Connectivity — Connects to Site-CTRL over Ethernet, Kramer master controllers via KNET, and serial devices via 3x RS-232 terminal block ports.
• 2 IR Emitter Outputs + IR Receiver — Controls IR devices in the space; built-in IR receiver learns commands from existing remotes.
• 4 Relay Outputs — Contact closure for projection screens, motorized shading, and blinds on terminal block connectors.
• 2 GPI/O Ports — Configurable for sensors, occupancy detection, and building automation integration.
• 3-Gang US Wall Mount — Fits standard US 3-gang in-wall junction boxes for clean, integrated room installation.
• K-Config Software Programming — All button macros, LCD labels, and control logic configured via Kramer K-Config software.
• Keypad Lock-Out — Software-enabled lock-out prevents accidental or unauthorized button input during presentations or scheduled events.

Typical Applications

• Boardroom and large conference room AV control
• Auditorium and multi-purpose room system control
• University lecture hall AV and environment management
• Government and municipal chamber control interfaces
• House of worship AV and lighting control keypads

Technical Specifications

Frequently Asked Questions