User`s manual

NPort 6000 Series User’s Manual Getting Started
2-8
The NPort 6450 and 6650 models have additional LEDs for the alarm and optional network
modules:
LED Name LED Color LED Function
green
The fiber optic network module is plugged in and has
been detected.
Module
(6450/6610/6650)
off The fiber optic network module is not present.
Link (on optional
network modules
NM-FX01-M-SC,
NM-FX01-S-SC)
orange
Steady on: The NPort 6000 device server is connected to
an Ethernet fiber connection, but the port is idle.
Blinking: The fiber port is transmitting or receiving data.
red The relay output (DOUT) is open (exception).
Alarm
(6450/6610/6650)
off The relay output (DOUT) is short (normal condition).
GSM
(NM-GPRS/GSM)
green GSM Connection
GPRS
(NM-GPRS/GSM)
orange GPRS Connection
GPRS/GSM
Signal Strength
(NM-GPRS/GSM)
green
More LEDs indicates better signal; 4 LEDs indicates
maximum signal strength.
DCD
(NM-Modem)
green Modem connection link up.
green The modem port is transmitting data.
TxD
(NM-Modem)
off Data is not being transmitted through the modem port.
green The modem port is receiving data.
RxD
(NM-Modem)
off No data is being received through the modem port.
Adjustable Pull High/Low Resistors for the RS-485 Port
In some critical environments, you may need to add termination resistors to prevent the reflection
of serial signals. When using termination resistors, it is important to set the pull high/low resistors
correctly so that the electrical signal is not corrupted. The NPort 6000 uses jumper settings or DIP
switches to set the pull high/low resistor values for each serial port.
To set the pull high/low resistors to 150 KΩ, make sure that the two jumpers assigned to the
serial port are not shorted by jumper caps. (For the NPort 6650, make sure both of the assigned
DIP switches are in the OFF position.) This is the default setting.
To set the pull high/low resistors to 1 KΩ, make sure that the two jumpers assigned to the serial
port are shorted by jumper caps. (For the NPort 6650, make sure both of the assigned DIP switches
are in the ON position.)
ATTENTION
Do not use the 1 KΩ setting on the NPort 6000 when using the RS-232 interface. Doing so will
degrade the RS-232 signals and shorten the maximum allowed communication distance.