screw terminals, and the connector screws, which secure the connector plug on the front
panel.
Figure 2.
Power Screw Terminal Connector Plug
C
V2
C
V1
2
1
2
1. Terminal Screw
2. Connector Screws
Caution
Do not tighten or loosen the terminal screws on the power connector
while the power is on.
3.
Connect the positive lead of the primary power source to the V1 terminal of the power
connector plug and tighten the terminal screw to 0.20 to 0.25 N · m (1.8 to 2.2 lb · in.) of
torque.
4.
Connect the negative lead of the power supply to one of the C terminals of the power
connector and tighten the terminal screw to 0.20 to 0.25 N · m (1.8 to 2.2 lb · in.) of
torque.
5.
Optionally, you can connect the positive lead of another power supply to the V2 terminal
and the negative lead to the other C terminal.
Caution
The C terminals are internally connected to each other.
6.
Install the power connector into SYS PWR IN on the front panel of the controller and
tighten the connector screw flanges to 0.3 to 0.4 N · m (2.7 to 3.5 lb · in.) of torque.
7.
Turn on the external power source(s).
Note
Refer to the
IC-3173 User Manual
on
for a complete
description of power inputs and controller startup options.
Connecting the Isolated Outputs Power Supply
Complete the following steps to supply power to the isolated outputs.
1.
Verify the power source is turned off. Verify the power source for ISO PWR IN is
between 4.5 V to 30 V.
2.
Loosen the connector screws and remove the isolated outputs power connector plug from
the controller. The following figure shows the V (positive) terminal screw and the C
(negative) terminal screw, which secure the wires in the screw terminals, and the
connector screws, which secure the connector plug on the front panel.
IC-3173 Getting Started Guide
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© National Instruments
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