Valve Wiring Setting the Terminating Resistance Jumpers • 4
For retrofits or stepper valve harnesses without a
mating molex connector, use the MultiFlex ESR
adapter cable (P/N 335-3275). Crimp-type
waterproof splices should be used to make the
connections.
For Sporlan valves used with these discontinued
boards, match all wire colors except the blue
wire. Instead, connect the blue wire to the Spor-
lan green wire.
4 Setting the Terminat-
ing Resistance Jumpers
All MultiFlex ESR boards have a set of termi-
nating resistance jumpers (one jumper for each
wire lead). These jumpers are labeled JP2, JP3,
and JP4 on the MultiFlex ESR board.
Set the termination jumpers UP (JP2, JP3, JP4)
if at either end of a daisy chain. Otherwise, set
jumpers DOWN.
The purpose of the jumpers is to indicate the two
ends, or termination points, of the segment. On a
daisy chain, one device at the beginning and one
device on the end must be terminated by placing
all three termination jumpers in the UP position.
All other devices on the daisy chain must be set
to the DOWN position. Figure 4-1 shows the
proper terminating resistance jumper settings for
the MultiFlex ESR board.
For more information about network configura-
tion and termination, see the I/O Network wiring
section in your site controller’s user manual.
5 Setting the Network
Address and Baud Rate
Set the network address on the first five rockers
of the dip switch (labeled S1) on the MultiFlex
ESR board. Set the network baud rate using
rockers 6 and 7.
Figure 3-4 - ECT Flow Valve and Old Board Wiring
Figure 4-1 - Daisy Chain Termination Jumper Settings
CAUTION: Always have the JP1 jumper
(located on the far right side of the board
opposite the Termination jumpers) set to the
Normal
position, or the board will not operate
correctly.
NO TERMINATION
(Jumpers in the
DOWN position)
JP2 JP3
JP4
TERMINATION
(Jumpers in the
UP position)
JP2
JP3
JP4
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