Tier 2 wiring
Use shielded cable and the following principles when connecting the KMD-5551E translator
to a Tier 2 network:
l
Use twisted pair, shielded cable with capacitance of no more than 51 picofarads per
foot for all network wiring. Belden cable model #82760 meets the cable requirements.
l
Connect the -A terminal in parallel with all other A or -A terminals.
l
Connect the -B terminal in parallel with all other B or +B terminals.
l
Connect the shields of the cables together at each controller.
l
Connect the shield to an earth ground at one end only.
l
Use a KMD-5575 repeater if the cable length will exceed 4,000 feet (1,220 meters). Use
no more than seven repeaters per Tier 2 network.
l
Place a KMD-5567 surge suppressor in the cable where it exits a building.
Illustration 1–3 Tier 2 wiring and end-of-line switches
-A +B S
-A +B S
End of segment
Middle of segment
EOL (End-Of-Line) termination switches
The devices on the physical ends of the Tier 2 wiring segment must have end-of-line
termination added for proper network operation.
l
If the translator is at the end of the network segment, set the EOL switch to
ON
.
l
If the translator is in the middle of the network segment, set the EOL switch to
OFF
.
Connecting power
Power the KMD-5551E translator from a 24 volt power source, either AC or DC, or from a USB
connection. The translator begins to operate when a power source is applied. Use the
following guidelines when choosing and wiring sources to the translator.
Section 1: Introduction
KMC Controls, Inc.
10
Revision B
