Optional Equipment; Before Getting Started; Noise Considerations - National Instruments UMI-7774 User Manual

Chapter 2 Installation

Optional Equipment

Before Getting Started

Noise Considerations

Caution Failure to follow these precautions may result in system instability and may cause
permanent damage to system components.
National Instruments UMI-7774/7772 User Manual
National Instruments offers a variety of products for use with the
UMI-7774/7772, including the following:
• Mounting accessories. Refer to the
section for information about specific equipment for each available
mounting package.
• Separate +24 V power supply for isolated I/O.
• Additional SHC68-C68-S cable (0.5 m or 2 m) with 68-pin VHDCI
offset male connectors on both ends. Use this cable to connect the
digital I/O connector on the National Instruments motion controller
to the digital I/O connector on the UMI-7774/7772.
• 9-, 15-, and 25-pin D-SUB to flying lead cables (part number
190911-04, 19012-04, and 19013-04). Use these cables to connect the
UMI-7774/7772 D-SUB connectors to third-party drives and feedback
devices.
This section provides information about noise considerations and safety
guidelines as well as instructions for unpacking the UMI-7774/7772.
Before connecting the UMI-7774/7772, verify that all system components
are grounded correctly and that all wiring is properly shielded. Do not
connect high-voltage wires and low-level signals to the same channel.
The following list includes additional noise considerations.
• Keep high voltage lines, such as AC power cables and motor drive
cables, away from low-level signals, such as encoders and limits.
• Use twisted pair cable for differential signals, such as encoders.
• Ensure that all cables connected to the UMI-7774/7772 include a
braided shield.
• Use hoods with internal metallic shielding for D-SUB connectors.
Mounting the UMI-7774/7772
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