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Appendix B: Cable Limits

B.1 Network/Cable Limits

Thinwire (10BASE2) segments can be no longer than 185 m (600 ft.), and can have taps no closer together than 0.5 m (1.5 ft.) apart. These can be no more than 30 taps per segment.

Thickwire segments can be no longer than 500 m (1650 ft.). Taps must be increments of 2.5 m (8 ft.) apart. There can be no more than 100 taps per segment.

10BASE-T segments can be no longer than 100 m (330 ft.). Longer segments may work in some instances, but we do not recommend them. Cable is phone grade (or better) unshielded twisted-pair (UTP) cable, RJ-45 connectors.

AUI cables can be no longer than 50 m (165 ft.).

For all media types, a total of 4 repeaters are allowed between any two nodes connected by 5 segments of cable. A maximum of 3 segments between any two nodes can have taps on them—the others must be point-to-point links (10BASE-T or fiber). For example, if you use 5 segments to go across 4 repeaters between 2 nodes, 2 of the segments (5-3=2) must have NO taps.

B.2 Serial Cables

The EPS complies to the RS-423 specification. If you connect the EPS to an RS-232 device, it is subject to the RS-232 limits shown below. If you connect the EPS to an RS-422 device, it is subject to the RS-422 limitations.

•RS-232 lines are limited to 15 m (50 ft.) in length.

•RS-422 lines are limited to 300 m (1000 ft.).

B.3 Parallel Cables

Parallel cables (Centronics or Dataproducts) can be no longer than 6.1 m (20 ft.).

All parallel cables must be internally twisted (each signal with its return signal) for the interfaces to function properly. If you don’t follow this rule, the EPS may lose data.

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Black Box LE3700A-R2 manual Appendix B Cable Limits, Network/Cable Limits, Serial Cables, Parallel Cables
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LE3700A-R2 specifications

The Black Box LE3700A-R2 is a powerful device designed to meet the demands of modern communication and data management in various environments. This advanced unit combines a multitude of cutting-edge features and technologies, making it an essential tool for professionals in fields such as IT, telecommunications, and multimedia broadcasting.

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Overall, the Black Box LE3700A-R2 stands out as an exceptional piece of technology that brings together performance, security, and versatility. Its combination of advanced features and user-centric design makes it a valuable asset for professionals seeking to enhance their operational capabilities and ensure the effective management of data and communications in their respective fields.
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