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twigwirelesscontrols.com
7.5 USInG MUlTI-vAlvE TwIGS AnD COnnECTInG TO vAlvES ThAT ARE
ClOSE TOGEThER:
Multi-valve TWIGs are the way to run more valves with one TWIG. The models ‘TWIG-2’ and TWIG-4’ have
the capability to hook-up to several valve solenoids. This is a cost savings since only one TWIG is needed to
control each valve independently. The colored wire leads are provided. The wire color code drawing below
shows the pairs of wires to use for each solenoid. These should be kept in order because mis-matched
pairs won’t work. Be sure to cap any unused wires. Limit the distance to the farthermost valve to less than
50 ft. (the limit of wire length from TWIG to valve).
7.6 lATCh TyPE SOlEnOID REQUIREMEnT:
In order to minimize the battery power required to run the TWIG system, a special latch (or pulse) solenoid
coil is used. The coil of the solenoid operates each pilot valve to make the Nelson valve open and close. A
short electrical pulse takes extremely low power consumption from the low power battery. The latching dry
coil contains a magnetic part that holds the internal plunger without any power required to keep it in place.
It is designed to shift when a reverse polarity pulse of power is applied. The pulse duration is extremely
short since it is less than one tenth of a second. Only the approved type of solenoid should be used. The
advanced design of the TWIG has been perfectly matched to the coil pulse duration and power. Use only
approved latch solenoids because others could malfunction. Nelson # E23, #E28, or #E29. Note: the Nelson
QC valve has reverse polarity for the solenoid wires. That is because it takes pressure to open the valve
which is the reverse of normal valves.
TWIG wire color code to connect solenoids
TWIG
note
ThE MUlTI-vAlvE TwIGS
CAn hAnDlE AS MAny AS 4
vAlvES. ShORT wIRES COn-
nECT ThE vAlvES AnD ThIS
wIRE lEnGTh MUST bE lIM-
ITED TO lESS ThAn ThE DIS-
TAnCE Of 50 fT.
