The LTC 8780 series data converter device is an accessory device for closed circuit monitoring systems. It can convert dual-phase control codes to RS-232 codes or RS-232 codes to dual-phase control codes. It also has subnet selector functionality and full signal distribution capability, making it suitable for driving multiple receiver/driver devices.
The LTC 8780 series data converter unit is an accessory that translates Allegiant dual‑phase control codes into RS‑232 signals and can also perform the reverse conversion. It supports traditional RS‑232 media such as modems, fiber or microwave links and includes a signal‑distribution function capable of driving up to 120 receiver/driver devices.
The unit can be wired in star or daisy‑chain configurations, with each of its 15 outputs capable of driving eight receivers. Using 1 mm (18 AWG) shielded twisted pair (e.g., Belden 8760) the maximum transmission distance is 1.5 km (5000 ft). The manual provides installation, configuration, and technical specifications for the LTC 8780/50 and LTC 8780/60 models. This manual is written in Chinese.
| Model | LTC 8780/50, LTC 8780/60 |
|---|---|
| Rated Voltage | 230 VAC (50 Hz) for LTC 8780/50; 120 VAC (60 Hz) for LTC 8780/60 |
| Voltage Range | 198 V – 264 V (LTC 8780/50); 108 V – 132 V (LTC 8780/60) |
| Power Consumption | 4 W |
| Connector – Input Dual‑phase Code | 1 × 15‑pin connector (included) |
| Connector – RS‑232 Input | 1 × 9‑pin D‑sub (industry‑standard modem cable compatible) |
| Outputs – Dual‑phase Code | 3 × 15‑pin connectors providing 15 separate outputs |
| Dimensions (W × D × H) | 223 mm × 280 mm × 40 mm (8.77 × 11 × 1.59 in) |
| Weight | 1.6 kg (3.5 lb) |
| Operating Temperature | -18 °C to 50 °C (0 °F to 122 °F) |
| Storage Temperature | -40 °C to 60 °C (-40 °F to 140 °F) |
| Maximum Transmission Distance (1 mm 18 AWG shielded twisted pair) | 1.5 km (5000 ft) |
Up to 1.5 km (5000 ft) can be achieved with that cable.
The unit provides 15 separate dual‑phase outputs.
It requires 230 VAC at 50/60 Hz.
A 9‑pin D‑sub connector compatible with standard modem cables.