This relay design is used to operate a single master valve
(MV) or pump start (PS) when shared by two controllers. This
design prevents sharing commons between the two controllers
which violates National Electric Code.
This design assumes the valve common wires for controllers
A and B are independent from one another with the exception
of the MV or PS wiring.
Operation
The master valve or pump start is normally connected to controller
B. The relay is energized when controller A turns on. The
MV/PS voltage from controller B is interrupted and is now
supplied from controller A.
If both controllers operate at the same time, the system
will continue to run as long as the water supply is sufficient
for both systems.
What Components To Use
The drawing is designed around components that should be
readily available at your local electronics store or from
Newark Electronics.
Device
Description
Part Number
NTE
Part Number
Newark
Relay
24 VAC coil
DPDT
10 amp contacts
R10-11A10-24
24F2611
Socket
11-Pin
Panel/Surface Mount
R95-105
57F3430
Wiring
For ease of installation, it is recommended that relay sockets
are used. The sockets have tabs for mounting into the controller
cabinet, and allows easy replacement of a defective relay.
The drawing details the terminal screw positions for the specified
sockets. This is the top view of the socket.
What Other Designs Are Available
Many additional designs are available by calling the Rain
Bird Specification Hotline 1-800-458-3005
