SDS Series
42
Programming
PRESSURE:
This sensor will either stop irrigation high and low pressure, or skip a station after a pre-set
time delay. Digital sensors can be connected to the terminals [HP], [SP] and [LP]. The [PRE]
terminal at the controller is for an analogue 4-20 mA pressure sensor.
INPUTS
< Press Enter >
Pressure Sensor
< Press Enter >
From the Time and
date display scroll
Inputs are from switches or sensors. The controller supports analogue and digital inputs. Both
direct connection to the controller terminal strip and the 12 field Data-Nodes.
INPUTS:
Pressure Sensor
L### S### H###
Use keypad to select pressure setting in kPa.
L=Low, S=Skip station H=High.
Note. If analogue sensor is not used - Pre-set sensors can be connected to the controller ter-
minals [HP], [SP] and [LP]. (N/O contacts)
If an analogue
sensor is used
Pressure Sensor
Digital Inputs
To program delays for sensors, refer to SYSTEM SETTINGS instructions page 38.
Use scroll < > keys to next
or previous slot and repeat
PROGRAM START SENSOR:
Prg. Start Sensor
< Press Enter >
Select Programs
- - - - - - - - 8
This sensor will activate its selected programs for their programmed run times. The sensor
input is located at the controller terminal [PRS].
INPUTS
< Press Enter >
Pressure Sensor
< Press Enter >
From the Time and
date display, scroll
Note. Program 8 is as default.
Note: The Skip Pressure function may not hydraulically activate a valve quickly enough, as
some pumps have steep pressure curves. For example: a skip and high pressure setting may
only be 100kPa apart. This differential may only take a couple of seconds the reach the high
pressure cut-out point when pumping against a closed head. If this is the case, the time for
the electrical signal to be initiated and a valve to electrically and hydraulically respond may
be beaten by the high pressure cut-out. A pressure sustaining/relief valve can be installed
that is sized to slow down the pressure increase if a valve fails to open but not completely
prevent a pressure increase that would override a HP cut-out in a closed head condition.
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