Multimedia Central Control IP Terminal with RS-232/485 & I/O
2x20W Amplifier • RS-232/485 Ports • I/O Ports • Infrared Learning • Relay Control • Real-Time Clock • DC24V Supply
T-7705AC
The integration hub for smart room automation. The T-7705AC is a unique wall-mounted IP terminal that combines a 2x20W audio amplifier with extensive control interfaces: RS-232, RS-485, I/O ports, relay outputs, and infrared learning. Perfect for classrooms, meeting rooms, and boardrooms where centralized control of AV equipment, lighting, and audio is required.
| Model Number | T-7705AC |
| Product Type | Multimedia Central Control IP Terminal |
| Amplifier Output | 2 x 20W (stereo) @ 4-8Ω |
| Network | 10/100Mbps Ethernet (RJ45) |
| Audio Protocols | TCP/IP, UDP, HTTP, RTP, RTSP |
| Audio Codecs | MP3, WAV, PCM |
| Audio Inputs | 1 x MIC (3.5mm), 1 x AUX (RCA) |
| Serial Ports | 1 x RS-232, 1 x RS-485 |
| I/O Ports | 2 x Digital Inputs, 2 x Digital Outputs |
| Relay Outputs | 1 x Relay (NO/COM, 30V/1A) |
| Infrared | 1 x IR Learning port, 2 x IR Emitter outputs |
| Real-Time Clock | Battery-backed, for scheduled events |
| Power Supply | DC 24V (included adapter) |
| DC Output | 24V DC (for external devices, up to 500mA) |
| Frequency Response | 80Hz – 18kHz (±3dB) |
| THD+N | < 0.1% (1kHz, 10W) |
| S/N Ratio | > 85dB |
| Power Consumption | ≤ 12W (without speakers), ≤ 25W full volume |
| Mounting | Wall mount (included), 86x86mm back box compatible |
| Dimensions (WxHxD) | 180 x 120 x 45 mm |
| Weight | 1.2 kg |
| Operating Temperature | 0°C – 40°C |
| Humidity | 10% – 90% non-condensing |
| Color | White / Black (optional) |
| Certifications | CE, FCC, RoHS |
The T-7705AC features a battery-backed real-time clock, allowing scheduled events to execute even if network connectivity is temporarily lost. Perfect for classroom bell scheduling, timed announcements, and automated AV system power-up/down.
The T-7705AC is a specialized wall-mounted IP terminal that serves as the central control hub for smart classrooms, meeting rooms, and boardrooms. Unlike standard IP speakers, it combines audio amplification with comprehensive control interfaces, enabling integration with projectors, screens, lighting, shades, and other AV equipment.
Complete Room Control: The T-7705AC can replace multiple dedicated controllers. With RS-232/485, I/O ports, relay, and IR outputs, it can:
Integrated Audio Amplifier: The 2x20W stereo amplifier drives local speakers for room audio – perfect for presentations, background music, and announcements. MIC and AUX inputs allow local source connection.
Network Integration: All control functions are managed via the T-7700RP server software, allowing centralized scheduling, event programming, and remote monitoring. Multiple T-7705AC units can be coordinated for campus-wide AV control.
DC24V Output: The built-in 24V DC output (500mA) can power external sensors, relays, or small devices, simplifying installation.
Serial control of projectors, displays, matrix switchers, and other AV equipment. Configurable baud rates, command strings.
Learn IR codes from any remote, then transmit via built-in emitters. Control TVs, air conditioners, and other IR devices.
Digital inputs for sensors, relay outputs for screens/lights. Trigger events based on room occupancy or manual buttons.
Battery-backed RTC for scheduled events even without network. Ideal for bell schedules and automated routines.
| Port | Specifications |
|---|---|
| RS-232 | DB9 male, baud rate 1200-115200, data bits 7/8, parity none/even/odd, stop bits 1/2 |
| RS-485 | 2-wire, terminal block, max distance 1200m, up to 32 devices |
Pre-programmed drivers for major projector brands (Epson, Sony, Panasonic, etc.)
Custom command strings can be sent via T-7700RP software
| Feature | Description |
|---|---|
| IR Learning Port | Front-panel IR receiver for learning codes from any remote (30-60kHz) |
| IR Emitter Outputs | 2 x 3.5mm mono jacks for IR emitters (included), can be placed near devices |
| Code Storage | Up to 128 IR commands can be stored, each up to 200ms duration |
| Learning Process | Via T-7700RP software – point remote at unit, press button, name command |
Learn from any IR remote
Control TVs, AC, projectors
| Port | Type | Electrical | Typical Use |
|---|---|---|---|
| Digital Input 1-2 | Opto-isolated | 5-24V DC, dry contact | Occupancy sensors, door contacts, push buttons |
| Digital Output 1-2 | Open collector | 30V/100mA max | LED indicators, small relays, logic signals |
| Relay Output | Form A (NO/COM) | 30V/1A AC/DC | Projector screens, shades, lighting contactors |
| DC24V Output | Regulated | 24V DC, 500mA max | Powering sensors, IR extenders, small devices |
The battery-backed real-time clock maintains accurate time even during power outages. Schedules can be programmed via T-7700RP software for:
Battery life: 3+ years (CR2032, replaceable).
Battery-backed RTC
Events run even offline
| Model | Primary Function | Control I/O | Display |
|---|---|---|---|
| T-7705S/B/BG/BM | Audio speaker with wireless mic | None | 3.4" LCD |
| T-7705A | Touch screen audio terminal | None | 4.3" TFT |
| T-7705AC | Central control & audio | RS-232/485, I/O, relay, IR | LED indicators |
1. Relay: screen down
2. RS-232: projector on
3. IR: TV on
4. Audio: mic active
1. Time trigger 6:00 PM
2. Relay: screen up
3. RS-232: projector off
4. Digital out: lights off
1. Input: PIR no motion
2. Wait 15 minutes
3. Turn off all devices
The T-7705AC requires the included 24V DC power adapter. PoE is not supported due to the additional power needed for relays, IR emitters, and DC24V output. The unit provides a 24V DC output (500mA) for powering external sensors or small devices.
The T-7705AC can integrate with BMS via its serial ports and I/O. RS-485 allows connection to Modbus networks, and digital inputs can accept signals from fire alarms, security systems, or occupancy sensors. All events are logged on the T-7700 server.
T-7705AC (wall) → RS-232 to projector, IR emitters to TV, relay to screen, DC24V to PIR sensor
Audio outputs to 2x 20W ceiling speakers. MIC input for teacher microphone. AUX input for laptop audio. All controlled via touch panel or scheduled events.