User Manual

FireNET FNP-LED I & O Manual v1.0 UL
11
COMM - 0V
COMM +
24V
3.5.1 Terminating Jumper
If the FNP-LED is the last device on the RS-485 bus a terminating jumper must be
installed. Only one board (the last board physically connected to the RS-485 bus)
should have the jumper installed. If serial annunciators or I/O boards are installed on
the circuit, the terminating jumper should be installed on only the last device located on
the circuit. The jumpers must be removed on all other devices.
If there are multiple driver boards in the FNP-LED, the terminating jumper must be
installed on the last board physically connected to the RS-485 bus. This is illustrated
below:
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