Led-10 series – Fire-Lite LED-10 Series Remote Fire Annunciator User Manual
Page 18
18
Document 50400 Rev B 10/27/97 P/N 50400:B
LED-10 Series
Plug-in terminal blocks
Notes:
1) All connections are power-limited and supervised.
2) A maximum of 32 LED-10 Series Annunciators may be connected to this circuit.
3) 6,000 feet (1,800 m) maximum distance @ 18 AWG (0.75 mm
2
) between the panel and
annunciators.
4) Use overall foil/braided-shield twisted pair cable suitable for EIA-485 applications (refer to Section
Four for shield termination information).
5) The EIA-485 circuit is rated at 5.5 VDC maximum and 60 mA maximum.
6) The LED-10 Series Annunciators must have the supplied R120 (120 ohm) resistor installed
across the EIA-485 terminals on the last or only device connected to the EIA-485 bus as shown.
The resistor is required for impedance matching.
Figure 3-3: EIA-485 Connection
No connection
Shield
+ EIA-485
- EIA-485
Refer to Note 6
TB2
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