Hit Products LogicPLUS S 42/128 - Manual (Page 31)

31
LogicPLUS-S Two-Wire Controller 31
VALVe WiRinG
The field wiring from the controller to the receivers consists of either one, two, three or four, 2-wire runs,
which connect, in series, to each valve location. Each 2-wire run is totally independent of the other
relative to wire size requirements and the number of valves operating simultaneously. All four 2-wire
runs receive and output the exact same information. The purpose of four independent 2 wire runs are
for reducing the potential amount of “back tracking” when valves are located in more than one general
direction from the controller. Theoretically, with the Logic controller located in the center of an irrigation
project, one 2-wire run would go one direction and the second, third and fourth could go in other direc-
tions. Each 2-wire run starts at the controller and ends at the last receiver/valve for that wire run.
1) do not loop the field wires back to the controller.
2) do not connect field wires of one 2-wire run with those of another. each run is independent.
3) do not connect the field wires of one controller with those of another controller.
For the main 2-wire runs, it is very important to size the wire properly. Consideration for designing the
proper wire size includes the total wire distance from controller to the farthest receiver and how many
valves will be operating simultaneously. Wire size must be designed using Ohm’s law for any applica-
tion.
The field wiring should consist of one to four continuous main 2 wire runs starting at the controller ter-
minal labeled “Line 1,” “Line 2,” “Line 3,” “Line 4” and continuing to the last receiver/valve of that wire
run. If using the multiple output feature, use one continuous length of wire independently for each
output. Every receiver is to be connected directly anywhere on one of your main two-wire continuous
runs. The last receiver installed is the end of the main two wire run. You may operate a maximum
of eight of the same numbered receivers eight valves maximum of any random numbered receivers at
any one time.
WiRe COnneCTiOnS:
One of the most critical installation requirements of a Two Wire system is the quality of your wire con-
nections. If you follow these directions you will have a reliable, dependable control system for many
years. It is suggested to solder all receiver (red wire) connections to your main two-wire run. Next in-
stall the soldered two-wire connection in a waterproof underground connector housing. When soldering
is impractical, a waterproof “dry-type” connection such as the Hit Products DBC-BR wire connector is
required. The above mentioned products will provide an uncontaminated, dry connection.
See diagram page 40
do not use pre-filled wire nut connectors as they will impede the transfer of the signal through
the wire splice.