Rockwell Automation 1797 series ControlNet Ex Media Planning and Installation Manual

The 1797 series ControlNet Ex Media system provides a communication network for hazardous areas. This system allows you to connect up to 48 devices to the network with a maximum cable length of 1000m, or 250m with 48 taps. The system is designed for use with intrinsically safe devices and components.

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ControlNet Ex Media 1797 series Planning and Installation Manual | Manualzz

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Key features

  • Intrinsically Safe
  • Supports up to 48 taps
  • Maximum cable length of 1000m
  • Supports redundant media
  • Uses fiber repeater hubs for extended distance and star configurations
  • Uses coax cable and fiber cable

Frequently asked questions

You can use a maximum of 48 ControlNet Ex taps with a total of 250m of coax cable.

The maximum cable length in a ControlNet Ex Media system is 1000m. You can use a segment length of 1000m (3280 ft) with two taps connected. Each additional tap decreases the maximum length of the segment. You can have a maximum of 48 taps on a segment with a maximum segment length of 250m. Using a fiber repeater hub will create a new segment which increases the total length of the network.

The ControlNet Ex Media system cannot be used in a safe environment after it has been exposed to signals from a hazardous area.

Application considerations for the ControlNet Ex Media system include the number of taps needed, the type of coax cable, the type of fiber cable, the length of trunk cable sections, and the number of trunk terminators.
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