User guide

Page 93
Genesis II Installation Instructions
© Mass Electronics Pty Ltd 2010Chapter 4 – Commissioning
4-1.4.2 End of Cable Jumpers
Although the locations of End-of-Cable jumpers are not shown on the computer-generated wiring
diagram, they are easily located close to the unit’s RS485 Comms connector. Figure 4-7 shows the
location of the End-of-Cable jumper for a GENII AI REM unit. Jumpers for other units are similarly
placed. The rule for installing an End-of-Cable jumper is:
• If only one cable is connected into an RS485 Comms connector, a jumper must be installed in that
unit.
• If two cables are connected to the same RS485 Comms connector, the jumper plug must be le
open.
All units along the RS485 Comms network should be carefully checked to ensure that jumpers are
installed only in the last unit in the network.
R
GEN II AI REM
12
3
RS485 COMMS
CONNECTIONS
END-OF-CABLE
JUMPER
Figure 4-7: End of Jumper, Typical Location