The main purpose of using the EOLS (end of lines) in fire alarm system is line monitoring.
Different types of EOLs:
- Resistors
- Capacitors
- Diodes
EOLs in Fire Alarm System – Siemens:
Note:
To choose Siemens products, you should pay attention to the type of system, production series, manufacturer's recommendation and your local standards. The following information is to show an overview and sharing experiences. Finally, you should get updated information from the official website of the company or one of the product distributors and technical service providers in your area.
Resistors:
| Resistors | Specifications | Application |
| 120R | XTO2001-A1 | |
| 470R | XC10 | |
| 560R | FDCIO223 | |
| 680R | FDCIO223, XC10 | |
| 820R | XC10 | |
| 910R | XCI2005-A1 | |
| 1k15 | FDCIO222 | |
| 1k2 | XC10 | |
| 2k2 | 500mW | FC72x or FC20xx main board |
| 2k7 | FDCIO223 | |
| 3k01 | 500mW | FC72x or FC20xx Main board, FDCIO222 |
| 3K3 | FDCIO223, XC10 | |
| 6k2 (6k6) | For sounder flashers (parallel) | |
| EOL22(Ex) | FDCIO223 |
Diodes:
| Diodes | Specifications | Application |
| 1N4007 | 1000V/1A | FC72x Main board, FC12x Main board (monitoring) |
| 1N4004 | 280V | XC10, For sounder flashers (common minus) |
| 1.5KE20CA | 2047V / 2202V | XC10, FDCIO223 |
| P6KE18CA | 18V TVS, IO9A | XC10, FC12x (zones) |
Capacitors:
| Capacitors | Specifications | Application |
| 10 μF | 10 μF | FC12x (GB Continuity) |
Devices (Siemens):
| Device | EOLs |
| FC72x or FC20xx main board | Resistors (2.2k, 3k), Diode (IN4007) |
| FDCIO222 | Resistors (3k, 1.15k) |
| FDCIO223 | Resistors (560, 680, 2.7k, 3.3k), Diode (1.5KE20CA) |
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