WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
Key Technical Specifications
- Application: Digital input/output interface card for AUTRONICA BS-100 DYFI fire alarm control panels .
- Part Number: EAC-4; firmware/program variant P1-EAC4/A1-22 (often labeled “P1-EAC4/A1-22” on docs) .
- System Compatibility: BS-100 DYFI panels (program versions P1-BS100-3-20 / P5-BS100-3E20 family) .
- Digital Inputs (4×):
- General Alarm (GA) — active when connected to 0 V .
- Day/Night alarm organization (D/N) — active when connected to 0 V .
- Monitoring of external equipment (E / EKFE) — active when disconnected from 0 V .
- Group disablement (GRU-1 to GRU-3, typically 3 circuits; EAC-4 provides the input section for these functions) .
- Digital Outputs (4×):
- Alarm outputs AK-1 to AK-4 for bells/sounders; each max 1 A at 24 V DC .
- Expandable to 20 total alarm outputs using 4× BSB-100 modules (each adds 4 outputs) .
- Output Type: 24 V DC switched outputs (NPN-style / low-side switching typical for alarm circuits) .
- Input Logic: Dry-contact / open-collector style monitoring referenced to 0 V (common in BS-100 wiring diagrams) .
- Power Supply: Module runs from panel 24 VDC rails; panel mains 230 V AC +10/−15%, 44–440 Hz .
- Current Ratings:
- Alarm outputs: 1 A per circuit (AK-1 to AK-4) at 24 V DC .
- Panel normal consumption ~170 mA (no detectors/outputs); ~370 mA in alarm (module share is a fraction) .
- Environmental: Operating ambient −5 to +40 °C (panel spec); IP30 for control equipment .
- Mechanical: PCB module format for BS-100 cabinet/backplane; screw-terminal wiring per installation handbook .
- Certifications: Designed to meet EN 54 requirements for control and indicating equipment; marine approvals in BS-100 family .
Product Introduction
The AUTRONICA EAC-4 (P1-EAC4/A1-22) is the digital input/output PCB used inside BS-100 DYFI fire alarm control panels to handle four monitored 24 V DC inputs (GA, D/N, E, GRU) and four 24 V DC alarm outputs (AK-1 to AK-4, 1 A each). . It’s the workhorse card that interfaces external alarm devices, door holders, group disables, and day/night organization circuits to the panel’s logic. .
Field teams keep EAC-4 modules as critical spares for BS-100 installations because a single failed output or input section can take down whole alarm circuits.. We stock verified units (New Surplus or Refurbished) and can supply terminal photos and wiring references on request..
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| One alarm output (AK-x) dead; bells/sounders silent | Output transistor/driver failed; fuse open; wiring fault | ✅ High | Measure 24 V DC at AK-x terminals with load disconnected; check associated 1 A fuse (F31–F34 per label) . | Replace fuse; if 24 V still absent at terminal, swap EAC-4. |
| GA input not triggering remote alarm | GA contact wiring reversed; input section damaged | ✅ Medium | With GA contact closed, measure voltage at GA input terminal relative to 0 V; verify 0 V reference is solid . | Correct wiring (GA active when connected to 0 V); if still no response, replace EAC-4. |
| D/N organization not switching as scheduled | D/N input stuck; timer/relay upstream failed | ✅ Medium | Force D/N by shorting D/N input to 0 V; observe panel mode change; measure input voltage . | Fix upstream timer/relay; if panel doesn’t see D/N, suspect input stage. |
| GRU disable not working for a zone group | GRU input wiring open; input circuit failed | ✅ Medium | Short GRU-x input to 0 V; confirm panel shows group disabled; check continuity to terminal . | Repair wiring; if panel never registers GRU, replace . |
| Multiple outputs erratic; panel resets | Backplane contact issue; 24 V rail sag; short | ✅ Medium | Reseat ; measure 24 VDC at module rails under load; inspect for burnt components . | Clean contacts; reduce load or add BSB-100; replace module if rail sags only with installed. |
❗ Before swapping, photograph terminal wiring (GA, D/N, E, GRU, AK-1 to AK-4), the program version screen (P1-BS100-3-20 / P5-BS100-3E20), and fuse positions. Send those plus a description of the load (bells, sounders, door holders) and we’ll confirm the exact wiring map.
EAC-4
EAC-4
Frequently Asked Questions (FAQ)
Q: Is the hot-swappable in a live BS-100 panel?
A: No. Treat it as non–hot-swap. Power down the panel or at least disable alarm outputs and remove 24 VDC before pulling the card. I’ve seen panels lock up when I/O cards are yanked live.
Q: What’s the difference between and /M?
A: Functionally they’re the same digital I/O family for BS-100; “/M” typically denotes a marine/modified variant or specific firmware/revision. The core I/O map (4 inputs, 4 alarm outputs) remains the same. Always match the program variant (P1-EAC4/A1-22) to your panel firmware when possible .
Q: Can I use this to expand beyond 4 alarm outputs?
A: The itself provides AK-1 to AK-4. To go beyond 4, you add BSB-100 modules (each adds 4 more alarm outputs, up to 20 total) .
Q: What voltage/current can the alarm outputs handle?
A: 24 V DC, max 1 A per output (AK-1 to AK-4). Don’t exceed this—use external relays if you need to switch higher loads .
Q: How are the digital inputs activated?
A: GA, D/N, and GRU inputs are active when connected to 0 V; the E (external equipment monitor) input is active when disconnected from 0 V. Wire dry contacts accordingly .
Q: Why is pricing lower than factory-new?
A: BS-100 is a legacy platform; genuine new boards are scarce. Our stock is surplus or refurbished OEM hardware, priced to reflect availability while maintaining traceability and testing. If you need exact firmware/function-code matching for a specific country variant, tell us your panel’s program code and we’ll match it.
Q: Can I use in AutroSafe 4 panels?
A: No. AutroSafe 4 uses a different module set (e.g., BSE-310/320 for inputs, BSJ-310 for outputs). is specific to BS-100 DYFI panels.
