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12-1
A2677 Rev 1.5
X20 Sprayer Reference Manual
Regulator
The Regulator Drive outputs (Reg INC and Reg DEC on schematics)
drive a 2-Wire Motor Valve (generally referred to as Servo, Flow
Control Valve or Electric Pressure Regulating Valve).
To increase Flow the controller applies 12 Volts to Pin-1 and Gnd to
Pin-2 of the connector (Figure 12-1). To decrease flow the controller
applies Gnd to Pin-1 and 12 Volts to Pin-2. The polarity is constantly
changing while the controller adjusts the valve to maintain the desired
flow rate.
Testing
Figure 12-1. Regulator Connector