Contemporary Control Systems EIS UL864-Compliant Switches - Manual (Page 3)

TD070500-0IC
3
100BASE-T MDI-X CONNECTOR PIN ASSIGNMENTS
RJ-45 Usage
Note : The EIS Series provides the Auto-MDIX function,
eliminating the need for crossover cables between switches.
1 TD+
2 TD–
3 RD+
4 Not Used
5 Not Used
6 RD–
7 Not Used
8 Not Used
INSTALLATION
A clip is pre-attached for mounting on 35 mm DIN-rail. For panel-mounting, remove the clip,
extend the mounting brackets and secure with two #8 pan-head screws (not provided). See the
mechanical drawing on page two for mounting in an industrial enclosure or wiring closet.
Cabling Considerations
When attaching cables to the EISwitch, Table 1 should be considered.
Table 1 — Cabling Considerations
Observe in Table 1 that segment distance is very limited when using copper media —
regardless of the data rate. Although 10BASE-T segments can successfully use Category
3, 4 or 5 cable, 100BASE-TX segments must use Category 5 cable.
A popular choice for improved distance is multimode fibre — which also gives good
electromagnetic noise immunity and optimum protection from lightning strikes. Considerable
distance can be achieved in full-duplex mode — and the greatest distance can be realized in
full-duplex mode with single-mode fibre. Note that half-duplex operation yields a modest,
fixed distance which does not vary with the type of fibre in use. This is because half-duplex
mode is limited by the collision domain — irrespective of the length and type of fibre.
EIS switches offer three types of field connectors. Copper ports accept RJ-45 modular
plugs and fibre ports accept either ST or SC style connectors.