Fire-Lite LED-10 Series Remote Fire Annunciator - Manual (Page 19)

19
Document 50400 Rev B 10/27/97 P/N 50400:B
LED-10IM
EIA-485 24 VDC TB2
Terms 1 (+)
and 2 (-)
MS-5210UD
LED-10 Series in grounded box
LED-10 Series in grounded box
Refer to Note 4
Figure 3-4: Wiring FACP to LED-10 Series Annunciator
CAUTION! Please be certain to secure the LED-10IM module to the MS-5210UD and to keep all
wiring from mechanically interfering with the LED-10IM.
Note:
1) Twisted, shielded wire is recommended for the EIA-485 communications loop.
2) Four-conductor, overall shielded wire may be used for the four EIA-485 wires and the two power
wires. It is, however, strongly recommended that the power and communication wires be
separate whenever possible.
3) Refer to Figures 3-1, 3-2 and 3-3 for LED-10 Series and LED-10IM terminal designations.
4) 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.