The RC−74DL is a 12-button control keypad with a rotary knob and LCD displays. It is a versatile device that connects to powerful control tools: via Ethernet, it connects to Kramer's Site−CTRL™, a remote AV control, management and site monitoring system. For extended controlled device capacity, it connects to LAN-connected control gateways. For remote keypad control, it connects via KNET™ to main room controllers and auxiliary keypads. It can flexibly serve either as a standalone room controller, as part of a KNET™ multi-unit system, or as part of a multi-unit Ethernet system managed by the Kramer Site−CTRL™ site management platform. The RC−74DL is ideal for auditoriums and meeting rooms, for convenient control of their complex multimedia systems and other room equipment such as displays, lighting and blinds. - Backlit and labellable buttons — 12 RGB colour backlit touch buttons. The buttons are grouped into 3 groups, each with its own group LCD display. - Removable and customisable button caps. - Volume control button with LED — Bidirectional digital rotary knob for volume control, with a 5-LED bar for visual volume level feedback. - LCD displays — 3 blue LCD displays with 8 white characters, distributed across 3 button groups, for programmed visual indication and configured group labelling. - 2 K−NET™ connectors — Connection to main room controller and auxiliary keypads for remote keypad control. - Single-link K−NET™ connection — Provides single cable connectivity for the keypad, carrying both power and keypad control communication information. - 1 bidirectional RS–485 control port — Controls devices via RS–485 control protocols. - 3 bidirectional RS–232 control ports — Device control via bidirectional serial control protocols. - 2 IR transmitter control ports — Device control via IR control protocols. - 2 GPI/O control ports — Device control via general purpose input/output ports, configured programmatically as digital input, digital output or analogue input interface to control sensors, door locks, audio volume and light dimming level, or lighting control devices. - 4 relay control ports — Device control via relay contact closure, such as raising and lowering screens, curtains, blinds and shutters. - IR sensor port — Learns commands from IR remote controls. - Programmed control — Programming configuration with Kramer K−Config software. - Kramer Site–CTRL™ compatibility — For network management and remote control via Ethernet port. - Keypad lock — Option to prevent tampering by locking and unlocking keypad buttons. - Mini USB port — For downloading configuration files, setting K−NET™ identification number and powering the device during configuration. - Mounting — Flush mounting, in standard US 3-gang wall boxes. - Easy installation — Fits standard wall boxes for simple and economical installation.