Sun Pumps SJT10-120BL - Manual (Page 13)

3.7 Controller Settings
The PCA series controllers have several settings (see figure 3). Most features include system configuration adjustments, some of which
are user selectable by an eight position DIP-switch located on the face of the controller.
Switch 1 is the Remote Switch Logic. With this switch off (down), terminals “RS+” and “GND” must be connected to turn the controller
off. With this switch on (up), terminals “RS+” and “GND” must be connected to turn the controller on.
Switch 2 is the Low Water Cutoff Logic. With this switch off (down), terminals “RS+” and “GND” must be connected to turn the
controller off. With this switch on (up), terminals “RS+” and “GND” must be connected to turn the controller on. If you want to use this
feature with the booster pump system, contact SunPumps for further assistance.
Switches 3 and 4 are delay timer adjustments. The delay timer is used for the remote switch and the low water cutoff. This timer by
default is set for a 3 minutes. Switch 3 will increase the timer to 10 minutes; Switch 4 will increase it to 30 minutes. See Remote
Switch and Low Water Cutoff for more information.
Switches 5, 6, 7 and 8 are not used at this time and should remain down.
3.8 Auxiliary Control Circuits
The auxiliary control circuits are configured and controlled with the “Dip Switches”, “LP Adj.”, “Speed Control” and the “RS”, “LW”
and “GND” terminals. (See Figure 4)
These circuits offer expanded capability and are described here. The remote switch control is for float switches (storage tank level),
pressure switches or a remote system “ON/OFF” toggle switch. The motor speed control is for adjusting the flow rate of the pump.
There is also the low water cutoff, low power shut down and over current protection circuits. See each corresponding detailed
description below.
NOTE: Use only “Shielded Wire” to run from the remote switch to the controller and the ground wire must be grounded to the
controller side only. Induced voltages from lightning storms or two-way radio transmissions could damage the controller.
Over-Current Shut Down Circuit
The over-current shut down circuit will turn the controller off any time the current exceeds the current limit of the controller. When it
turns the controller off it will remain off for 3 minutes and then turn on again. When it turns off an error light will light and the display
will say Over-Current. When it turns on again, if it is still pulling excessive current it will continue to shut down for 3 minutes and try to
restart.
Sensor Low Water Cutoff Circuit
The sensor type low water cutoff circuit is designed as a safety feature to protect your pump from running dry or your tank from over
flowing. This feature is designed for use in the submersible SCS systems with the ground wire installed. For use with the SCB or SCP
systems contact SunPumps for assistance. The “LW” terminal of the controller should be attached to a low water sensor electrode which
is mounted in your tank or well. The system can be used to detect low water or to detect high water depending on the position of switch
2 on the dip switch. When dip switch 2 is in the off position, the low water cutoff circuit expects not to touch water. If water comes into
contact with it, and completes the circuit to ground, the pump will shut off until the water is removed and the delay timer times out. A
three minute timeout is default for this feature but is modifiable by switches 3 and 4 to 10 or 30 minutes respectively. This timeout
applies to remote switch and low water cutoff.
Remote Switch
The Remote Switch interface can serve as an automatic system shutdown when used with a water storage tank mounted float switch, a
pressure switch or it can also serve as a manual system shutdown with a remote system ON/OFF toggle switch. The remote logic circuit
allows the use of standard “Pump-Up or Pump Down” float switches. Please refer to the following operation scenarios for configuration
options.
With switch number 1 in the OFF position, the controller is configured to accommodate a Normally Open (N.O.) float switch or remote
toggle switch. In this configuration the controller will operate as follows: