Programming instructions

Designer’s Guide 15
Calsense
Transient Protection and Grounding
Transient Protection Board (model TP-1)
The Calsense Transient Protection Board prevents transient surges from entering the ET2000e Irrigation
Controller (Figure 4
). Lightning strikes can cause considerable damage to irrigation equipment. The
Calsense Transient Protection Board protects against this by using transorbs, solid-state devices, which
direct or switch the incoming transient away from the controller to a ground rod.
Note: Transient protection is only as good as the ground rod installed.
The Calsense Transient Protection Board has factory-labeled terminal strips for the connection of the
irrigation field wires, central communication cable wires, and various Calsense accessories, such as an ET
Gage and a Tipping Rain Bucket.
Note: When ordering, specify number of stations and options.
The Calsense Transient Protection Board is approximately the same height and width as a Calsense
ET2000e Irrigation Controller. It can be mounted directly below the controller, on a wall, or in an
enclosure. If exposed to weather, it should be mounted inside a Transient Protection Board Box (model
TPB).
Figure 4 - Transient Protection Board