TS-905 Infrared Transmitter/Receiver Conference Unit

TOA TS-905 Infrared Transmitter / Receiver Conference Unit

The TOA TS-905 is a cordless infrared transmitter/receiver unit for the TS-900 series conference system. It enables wireless communication between the central unit and chairman/delegate units via infrared signals and supports ceiling, wall or microphone-stand mounting for flexible, cable-free installation.

Key Features

Cordless infrared communication between conference central unit and delegate/chairman units, no RF interference or cables visible.
Mounting flexibility: ceiling, wall or microphone-stand installation for conference room convenience.
Infrared emitter/detector design: wavelength 870 nm, frequency-modulated carriers for multiple audio & control channels.
Wide communication angle and coverage: Vertical 150° (75° + 75°), Horizontal 360°, approx. 6–7 m radius at typical ceiling height.
BNC-jack connection to the central unit, simple and reliable link.
Designed for conference systems in hotels, educational institutions, offices and multi-language or multilingual translation environments.

Technical Specifications

Specification	Details
Model	TS-905
Power Source	24 V DC, supplied from the Central Unit.
Current Consumption	Max 150 mA
Infrared Wavelength	870 nm (AM: brightness modulation)
Modulation Method	Frequency modulation
Carrier Frequencies – Transmission	Audio channel 1: 7.35 MHz; channel 2: 8.10 MHz; channel 3: 8.55 MHz; channel 4: 9.15 MHz; Control channel: 6.45 MHz
Carrier Frequencies – Reception	Base language channel: 1.95 MHz; Translation language channel: 2.25 MHz
Acceptable / Emission Angle	Vertical: 150° (75° + 75°); Horizontal: 360° (both reception & emission)
Communication Area	Approx. 6-7 m radius (ceiling height 2.5-4.5 m)
Connection Terminal	BNC jack
LED Indicator	Power indicator
Operating Temperature	0 °C to +40 °C (32 °F to 104 °F)
Operating Humidity	90 % RH or less (no condensation)
Finish / Housing	Dome: PC resin with visible‐light cut filter; Base: ABS resin, black.
Dimensions	Ø120 × 71.3 mm (4.72″ × 2.81″)
Weight	Approx. 230 g (0.51 lb)