Kohler 20-3250 kW manual Controller Circuit Boards, Fuses, Terminal Strips and Connectors

1.2.4Controller Circuit Boards

The controller has five circuit boards—indicator, interconnection, keypad, digital display, and main logic/ communication. See Figure 1-9 for circuit board locations.

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5 4 3

GM10193B-A

1.AC fuse block (TB5)

2.Interconnection circuit board TB1, TB2, TB3, and TB4 terminal strips and F1, F2, and F3 fuses

3.Main logic (microprocessor)/communication circuit board

4.Keypad and digital display circuit boards

5.Indicator circuit board (LED and alarm horn)

Figure 1-9 Controller Circuit Boards and Fuses

(Controller Top View)

Indicator (Status) Circuit Board includes the LED status lamps, alarm horn, and generator set master switch.

Interconnection Circuit Board provides the terminal strips to connect the controller (customer) connection board and/or dry contact kits and three DC fuses (F1, F2, and F3). See 6.1.3 for more information.

Keypad (Switch Membrane) Circuit Board provides the keypad to navigate the generator set displays and enter data.

Digital Display Circuit Board provides the vacuum fluorescent display (VFD) for monitoring the generator set functions and output values.

Main Logic (Microprocessor)/Communication Circuit Board provides the controller operation logic and provides PC communication locally (direct) or remotely (via modem) using RS-232 or RS-485 connectors.

1.2.5Fuses

AC Circuit Fuses (TB5). Fuses are located inside the controller. See Figure 1-9.

D1.5-Amp (V7) fuse protects L1 sensing input to interconnection circuit board.

D1.5-Amp (V8) fuse protects L2 sensing input to interconnection circuit board.

D1.5-Amp (V9) fuse protects L3 sensing input to interconnection circuit board.

DC Circuit Fuses fuses are located on the controller interconnection circuit board.

D5-Amp Remote Annunciator (F1) fuse protects the dry contact kit if equipped and the controller panel lamps.

D5-Amp Controller (F2) fuse protects the controller circuitry.

D15-Amp Engine and Accessories (F3) fuse protects the engine/starting circuitry and accessories.

1.2.6Terminal Strips and Connectors

Terminal strips and connectors for inputs and outputs are located on the interconnection circuit board. See Section 6, Accessories.

TB1 Input Connection Terminal Strip provides input connections for remote start and emergency stop (E-Stop).

TB2 Analog Input Connection Terminal Strip provides analog input connections, including non-ECM sensor connections.

TB3 Accessory Power Output Connection Terminal Strips provides a generator set power supply for factory use.

TB4 Digital Input Connection Terminal Strips connect external devices (engine ECM and user supplied) to the generator set digital inputs.

P23 Connector connects the interconnection circuit board to the controller (customer) connection terminal strip (connector P25) inside the junction box. See 6.1.3 for more information.

TP-6200 10/12 Section 1 Specifications and Features 21