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Document 50581 Rev A 12/9/96 P/N 50581:A
LED-10IM
EIA-485
24 VDC TB2
Terms 1 (+)
and 2 (-)
SFP-1024
LED-10N in grounded box
LED-10N in grounded box
Refer to Note 4
Figure 4-4: Wiring FACP to LED-10N
CAUTION! Please be certain to secure the LED-10IM module to the SFP-1024 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 4-2, 4-2 and 4-3 for LED-10N and LED-10IM terminal designations.
4) The LED-10N 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.
LED-10N Electrical Connec-
ti
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