The Clear-Com PS-704 is a single rack space, one- to four-channel intercom system power supply which can provide up to 1.2 amps per channel to operate Clear-Com beltpacks and remote stations. This power is supplied to any or all of four channels and will support up to 40 beltpacks or 10 speaker stations.
Clear-Com's fail-safe design automatically shuts down the power to a channel when a short circuit or electronic overload is sensed on that channel. The other channels continue to operate normally. Once the fault condition is removed, the PS-704's fail-safe circuit will bring the power back up, even under full load conditions. LED indicators signal a fault on any channel. A line-level program input offers a master input level. Individual program selects, each with its own send level, are provided for each channel. Use of a switching power supply allows the PS-704 to operate with any AC line voltage from 100 volts to 240 volts AC at 50 Hz or 60 Hz. The metal chassis and extra-thick front panel with integral rack ears maintains legendary Clear-Com ruggedness.
Features:
Specifications:
| Program Line Input | |
| Max Level Before Clipping | ≥ 20dBu |
| Input Impedance | ≥ 5kΩ |
| Frequency Response | 200Hz – 20kHz ± 3dB |
| Max Distortion | ≤ 0.2% |
| Noise (Program Mic In → Partyline) | < -70dBu |
| Max Gain | ≥ -16dB |
| Min Gain | ≤ -20dB |
| Mains Power Supply | |
| Input Voltage Range | 100–240V AC |
| Input Frequency Range | 50–60Hz |
| Input Power | ≤ 60V AC |
| Output Voltage | 30V DC ± 0.5V |
| Output Current/Channel (Continuous) | 1.2A |
| Output Current/Channel (Peak) | 2A (Max 2s/min) |
| Short Circuit Recovery (1st Short) | ≤ 0.5 sec |
| Short Circuit Recovery (≥20 Shorts) | ≤ 20 sec |
| Environmental | |
| Operating Temperature | 32°F – 122°F (0°C – 50°C) |
| Physical | |
| Dimensions (HxWxD) | 1.75 × 19 × 7.5 in (44 × 483 × 190 mm) |