NI UMI-7774/72 User Guide and Specifications
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Mounting the UMI-7774/72 in a Standard 19 in. Rack
To mount the UMI-7774/72 in an EIA-standard 19 in. rack, you must use the rack-mount kit (part
number 778712-01) from National Instruments.
Complete the following steps to install the rack-mount kit.
1.
Fasten the rack-mount bracket to the back of the UMI-7774/72 using the captive screws on the
bracket.
Figure 12.
Fastening the Rack-Mount Accessory to the UMI-7774/72
2.
Bolt the rack-mount accessory to a standard 19 in. rack.
Caution
Disconnect power before removing the UMI-7774/72 from the rack.
Connector Descriptions
This section describes how to wire National Instruments motion controllers, third-party drives, sensors,
and field I/O to the UMI-7774/72. This section also describes the polarity (active state) settings
and LED indicators on the UMI-7774/72. Refer to Figure 1 for the UMI-7774/72 connector, LED, and
switch locations.
Power Input Terminal Block
The UMI-7774/72 requires a 24 VDC power supply to operate. The UMI-7774/72 has a 4-position
terminal block for wiring 24 VDC power and 5 to 30 VDC isolated power to the UMI-7774/72. The
isolated power is used in the optical isolation output circuitry for the drive enable outputs and digital
output signals. Optical isolation is a method for transmitting a signal from its source to a measurement
device without a physical connection by using an optical coupling technique. Optical isolation can help
break ground loops in the system and reduce the effects of noise and voltage transients.
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