Topcom X20 manual Regulator

Testing V1.98 21/06/06

19.1REGULATOR

Figure 67: Regulator connector

Overview

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 12volts to Pin-1 and Gnd to Pin-2 of the connector shown above. To decrease flow the controller applies Gnd to Pin-1 and 12volts to Pin-2. The polarity is constantly changing while the controller adjusts the valve to maintain the desired flow rate.

Regulator Drive Test Procedure

With a Digital Multimeter set to measure 20vdc, measure the voltage between Pin-1 and Pin-

2 in the following States:

State 1: Controller set to manual, sections and master ON, pressing and holding the Increase

Button. The meter should display 12 or -12volts. Note: It is not important which polarity is displayed.

State 2: Controller set to manual, sections and master ON, pressing and holding the Decrease Button. The meter should display opposite to State 1.

Confirming this verifies the regulator outputs on the controller are working correctly.

Note: If the Spray-line pressure increases when the Decrease button is pressed tick the "Reverse Valve Direction" setting under the TANKS/SETTINGS button in the Sprayer OPTIONS.

19.2SWITCHED POWER

Figure 68: Switched Power connector

Overview

This input is connected to the ZYNX power cable via the relevant extensions and "Y" cable. When the ZYNX is powered on a low current filtered 12v supply is applied to Pin-A to power up the ECU's processors.

Switched Power Test

With the ZYNX powered ON, confirm 12volts between Pin-A and Pin-B. Note: It is EXTREMELY important to ensure that the polarity is not reversed as damage will result to the ECU. Make certain that the Negative (Black) probe is in Pin-B and the Positive (Red) Probe in Pin-A, and that the Multimeter display does NOT show -12v. (Correct reading is 12volts)

Note: Do not use this output for any other application other than that described in all KEE literature.

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