NI 9792 WSN Real-Time Gateway User Guide and Specifications
14
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2.
Connect the positive lead of the power supply to the V1 or V2 terminal and the negative lead to one
of the C terminals.
3.
Optionally, you can connect the positive lead of another power supply to the other V terminal and
the negative lead to one of the C terminals. You must install the ferrite across both pairs of wires.
Note
If you connect power to both V1 and V2, you must ensure that the voltage difference between
the two power inputs, measured at the NI 9792 power connector, is at least 500 mV.
Note
The NI 9792 draws power from
either
V1 or V2, depending on which terminal has a higher
voltage. It does not draw power from both terminals. The NI 9792 switches between V1 and V2
without affecting operation.
Caution
The C terminals are internally connected to each other. If you use two power supplies, make
sure they share a common ground.
Caution
The C terminals are internally connected to the NI WSN 9792 chassis to prevent a faulty
ground connection from causing the chassis ground to float. If you reverse the input voltage, the
positive input voltage is connected directly to the chassis. The NI 9792 has built-in reversed-voltage
protection, but reversed voltage can damage connected peripherals if the chassis ground is not
reliably connected to earth ground.
Caution
Do
not
tighten or loosen the terminal screws on the power connector while the power
connector is plugged into the NI 9792 or while the power supply is on.
Powering On the NI 9792
Turn on each power supply to the NI 9792 system. The NI 9792 runs a power-on self test (POST).
During the POST, the POWER and STATUS LEDs turn on. When the STATUS LED turns off, the POST
is complete. If the LEDs do not behave in this way when the NI 9792 powers on, refer to the
Device
Interface
section.
Configuring IP Settings and Installing Software on the NI 9792
When you power on the NI 9792 for the first time, it boots into safe mode because there is no software
installed on it. This section describes how to configure the IP settings and install software on the
NI 9792.
Complete the following steps:
1.
Launch MAX on the host computer and expand
Remote Systems
in the MAX configuration tree.
MAX lists the NI 9792 as the model name of the NI 9792 followed by the serial number, for
example,
NI-NI9792-0146793C
.
Tip
If you cannot find the NI 9792 under Remote Systems, refer to the
CONSOLE OUT Switch
section for information about using a serial connection and a terminal program for troubleshooting.
The NI 9792 automatically attempts to connect to the network using DHCP. If DHCP is not
available, the NI 9792 connects to the network with a link-local IP address with the form
169.254.
x.x
.
2.
Select the NI 9792 under
Remote Systems
to see the
Network Settings
tab in the middle pane of
MAX.
3.
Enter a name for the RT target in the
Name
field.
4.
(Optional) Enter a valid SNTP time server for the RT target in the
Additional Configuration
section.
5.
Select settings for the RT target in the
IP Settings
section, and click
Apply
.
