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Phone: +86 16626708626Description
Key Technical Specifications
- Application: Interface module for connecting BU-70 display units and BU-100/BU-101 parallel operation panels to Autronica fire alarm systems (BS-100 and AutroSafe via BSL-337 path).
- Part Number: 8781-012.0410 (BSU-50-V3).
- System Compatibility: BS-100 DYFI panels; also used in migration paths to AutroSafe where existing BU panels are retained.
- Protocol Support: ASSP (Autronica Standard Short Protocol) for BU panels; ASAP (Autronica Standard ASCII Protocol) for external BMS/pagers; AutroCom on AutroSafe side when using BSL-337.
- Interfaces: RS-232C and 20 mA current loop (via external converter such as BSL-12/2 or RTZ-20).
- BU Panel Capacity: Up to 16 BU-70/BU-100 units per BS-100 panel in standard config; some docs cite up to 64 indication panels depending on addressing and cabling .
- Communication Line: 20 mA current loop for BU panels (passive transmitter/receiver); RS-232 for service/PC or EAU-321 links.
- Power Supply: 230 V AC +10/−15%, 44–440 Hz (panel-level); module itself runs from internal 24 VDC rails .
- Current Consumption: Panel normal ~170 mA (no detectors/outputs); ~370 mA in alarm—module share is a fraction of this .
- Environmental: Operating ambient −5 to +40 °C (panel spec); IP30 for control equipment.
- Mechanical: PCB module format for BS-100 cabinet/backplane; screw-terminal or plug-in connections per wiring diagram .
- Certifications: Designed to meet EN 54 requirements for control and indicating equipment; marine approvals in BS-100 family .
Product Introduction
The AUTRONICA BSU-50-V3 (8781-012.0410) is an interface module used to connect BU-70 display units and BU-100/BU-101 parallel operation panels to Autronica fire alarm systems, primarily the BS-100 DYFI family and migration setups to AutroSafe.. It handles protocol conversion between ASSP (for BU panels) and higher-level links (ASAP/AutroCom) and works with RS-232 and 20 mA current loop interfaces via external converters..
Field teams keep BSU-50-V3 modules in spares kits for legacy BS-100 installations and for upgrades where existing BU cabling and repeaters are retained while swapping the main panel to AutroSafe.. We stock verified units (New Surplus or Refurbished) and can supply pinout photos and wiring references on request..
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| BU-70/BU-100 shows “No Comm” or blank | 20 mA loop open/short; RS-232 converter fault; BSU-50-V3 not powered | ✅ High | Measure 20 mA loop continuity at panel terminals; check RS-232 converter (BSL-12/2 or RTZ-20) LEDs; verify 24 VDC at module rails . | Repair loop wiring; replace converter; if rails good but no data, swap BSU-50-V3. |
| All BU panels missing zone text; panel OK | Protocol mismatch (ASSP vs ASAP); BU count not configured | ✅ Medium | In BS-100 menu: SYSTEM → CONFIGURATION → BU-UNITS; confirm number matches installed units . | Re-enter BU count; verify protocol setting (1B = ASSP for BU units) . |
| Intermittent BU alarms; some panels drop | Cable capacitance/resistance out of spec; poor terminations | ✅ Medium | Check loop resistance (<30 Ω per BS-100 spec) and cable length; inspect terminal tightness . | Shorten loop or add repeater; re-terminate shields; split into two loops if needed. |
| BU panels show wrong zone IDs after upgrade | Addressing/zone mapping changed in new panel; EEPROM custom data mismatch | ✅ Medium | Compare zone text in new panel config with old printout; check custom data EPROM if used . | Re-map zones in new panel; reload custom data; test each BU panel individually. |
| Module not recognized; panel faults on comms card | Backplane contact issue; wrong slot; damaged connector | ✅ Medium | Reseat module; inspect backplane pins; try alternate slot if supported . | Clean contacts; replace module if panel still reports comms fault. |
❗ Before swapping, photograph terminal wiring (RS-232 pins, 20 mA loop terminals), the BU-UNITS config screen, and the module’s position in the cabinet. Send those plus your panel program version (e.g., P1-BS100-3-20) and we’ll confirm the exact wiring map.
BSU-50-V3
BSU-50-V3
Frequently Asked Questions (FAQ)
Q: Is the BSU-50-V3 hot-swappable in a live BS-100 panel?
A: No. Treat it as non–hot-swap. Power down the panel or at least disable the comms card and remove 24 VDC before pulling the module. I’ve seen panels lock up when comms cards are yanked live.
Q: Can I use this to connect BU-70/BU-100 panels to an AutroSafe system?
A: Indirectly, yes. In AutroSafe migrations, the BSL-337 (AutroSafe BU-70 interface) converts AutroCom to ASSP, then you use a 20 mA/RS-232 converter (BSL-12/2 or RTZ-20) to reach the existing BU panels. The is the legacy BS-100 side; in new AutroSafe builds you’d typically use BSL-337 instead.
Q: How many BU panels can I connect?
A: BS-100 docs cite up to 16 BU-70/BU-100 units in standard config; some installations push to 64 indication panels depending on addressing and cabling. Always configure the exact count in SYSTEM → CONFIGURATION → BU-UNITS .
Q: Do I need an external converter for 20 mA loop?
A: Yes. BU panels in BS-100 systems use 20 mA current loop with passive transmitter/receiver. You’ll need a converter like BSL-12/2 or RTZ-20 to bridge RS-232 to 20 mA.
Q: What protocols does this module handle?
A: ASSP (Autronica Standard Short Protocol) for BU panels; ASAP (Autronica Standard ASCII Protocol) for external BMS/pagers; and AutroCom on the AutroSafe side when paired with BSL-337.
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 reuse existing BU cabling when upgrading to AutroSafe?
A: Yes—that’s the main point of the migration path. You keep BU panels and cabling, replace the BS-100 panel with AutroSafe, and add BSL-337 + 20 mA converter so the BU panels still speak ASSP.
