Agri-Alert KPB 400 Installation page 6

It is extremely important that the earth ground terminal be connected to
a proper ground to protect the electronic components from damage due
to lightning surges and electrostatic discharges. Do not use the electrical
ground for this purpose.
IF OUTDOOR CONNECTIONS ARE USED, MOUNT THE ENCLOSURE
!
AS CLOSE AS POSSIBLE TO THE ENTRY POINT OF THE OUTDOOR
WIRING.
CAUTION
AN IMPROPER EARTH GROUND CONNECTION IMMEDIATELY
!
VOIDS THE SYSTEM WARRANTY WITHOUT FURTHER NOTICE.
WARNING
Serial Bus Interface (SBI): The serial bus interface is used to con-
nect the different Agri-Alert devices together. Four wires are
needed for this purpose. Use a shielded twisted pair cable (see the
appendix for maximum length and wire gauge recommendations).
Each device includes four terminals marked SERIAL BUS INPUT and
numbered from 1 to 4 (the terminals marked SERIAL BUS OUTPUT
are not used). Connect all the number 1 terminals together, all the number 2 termi-
nals together, etc. Each device includes an end of line jumper to identify the end of
the communication line. When a device is located at the end of the communication
loop, the end of line jumper must be at the YES position. For the other devices, place
the jumper at the NO position. The end of line jumper is located on the electronic
card inside the top cover (see diagram below).
END OF LINE JUMPER
6
KPB-400.rev.04
2 3 4
1
SERIAL BUS
INPUT