Description
Product Specifications
| Attribute | Specification |
|---|---|
| Model Number | 078120-PCA |
| Revision | Rev: C |
| Product Type | Amplifier Main Control Board |
| Compatibility | Silent Knight ECS (Emergency Communication System) Series |
| Audio Channels | Supports Single or Dual Channel configurations |
| Dimensions | 215 mm x 155 mm x 25 mm |
| Weight | 0.48 kg |
| Origin | USA |
| Power Input | 24 VDC (Supplied by ECS-50/125 base unit) |
Application Fields
The Silent Knight 078120-PCA is a core electronic component for distributed audio systems within fire alarm networks. It is primarily used in:
- Emergency Voice Evacuation: Providing clear, amplified voice instructions during fire emergencies.
- Mass Notification Systems: Broadcasting real-time alerts across large facilities like schools or hospitals.
- Large Commercial Complexes: Interfacing with multiple speaker circuits to ensure total building coverage.
- Industrial Sites: High-output audio signaling for noisy environments requiring emergency communication.
Product Instructions
- Installation: Ensure the main Fire Alarm Control Panel (FACP) and the ECS amplifier cabinet are completely powered down. Align the 078120-PCA with the mounting standoffs in the amplifier chassis and secure with the provided screws.
- Wiring: Connect the audio input cables and the speaker circuit outputs to the designated terminal blocks. Ensure proper polarity is maintained to prevent audio phasing issues.
- Address Setting: If the amplifier is part of a networked system, set the SLC (Signaling Line Circuit) address using the onboard rotary switches to match the site’s system map.
- Testing: Once powered, perform a “Voice Test” and “All Call” from the command center to verify that the Rev: C board is correctly processing and amplifying the audio signal across all zones.
Product Q&A
Q1: What is the main function of the 078120-PCA board? A1: This is the primary control and processing board for the ECS series amplifiers. It receives low-level audio signals and control data from the FACP and converts them into high-wattage output for the speaker circuits.
Q2: Can I use a Rev: C board to replace a Rev: A or B? A2: Generally, Rev: C is a direct hardware update that maintains backward compatibility. However, always verify that your amplifier’s chassis and power supply version support the specific component updates found on the Rev: C board.
Q3: What should I check if there is a “Trouble” LED on the amplifier board? A3: Check for speaker circuit issues such as open circuits, short circuits, or ground faults. Also, ensure the ribbon cable connecting the 078120-PCA to the secondary boards is firmly seated.
Related Product Models
- SILENT KNIGHT ECS-50W
- SILENT KNIGHT ECS-125W
- SILENT KNIGHT 5824
- SILENT KNIGHT 6860
- SILENT KNIGHT 5496
