Switches And Controls; Terminal Strips - Kohler 20-2250 kW Operation

1.2.5

Switches and Controls

Figure 1-6 describes the switches and controls located
on microprocessor controllers.
Name Description
Alarm horn Horn sounds if any fault or prealarm condition
exists (except emergency stop, battery charger
fault, high battery voltage, or low battery voltage).
Place the generator set master switch in the
AUTO position before silencing the alarm horn.
See controller resetting procedure in Section
2.3.5, Controller Resetting After a Fault Shutdown.
Alarm Switch silences the alarm during service. Place
silence the generator set master switch in the AUTO
switch position before silencing the alarm horn. To avoid
reactivating the alarm horn, restore all alarm horn
switches (controller, remote annunciator, and
audiovisual alarm) to their normal positions after
correcting the fault. See controller resetting
procedure in Section 2.3.5, Controller Resetting
After a Fault Shutdown.
Emergency Switch (if equipped) immediately shuts down the
stop switch generator set in emergency situations. Reset the
emergency stop switch after shutdown by pulling
the knob slightly outward. Use the emergency
stop switch for emergency shutdowns only. Use
the generator set master switch for normal
shutdowns. The local emergency stop switch is
standard on selected generator sets.
Generator Switch functions as the controller reset and
set master generator set operation switch. Refer to
switch Section 2.3.1, Normal Operation, Section 2.3.2,
Prime Power Mode Operation, and Section 2.3.5,
Controller Resetting After a Fault Shutdown.
Lamp test Switch displays the controller indicator lamps.
switch
Selector Switch selects the generator set output circuits to
switch measure. When switched to a position with three
circuit labels, the meters display the amperage on
the lead shown in the upper label and the voltage
between the two leads shown in the lower label.
The AC ammeter and voltmeter function only with
the switch in the ON position.
Voltage Control fine tunes (±5%) the generator set output
adjustment voltage. Used with 20--400 kW permanent
control, if magnet/wound field alternator models only. The
equipped voltage adjustment on 350--2000 kW pilot-excited
models is located in the generator junction box.
Figure 1-6 Switches and Controls
Modbusr is a registered trademark of Schneider Electric.
14 Section 1 Specifications and Features
1.2.6

Terminal Strips

Two terminal strips are mounted on the controller circuit
board. See Figure 1-7 and Figure 1-8. Refer to Section
2.3.2, Prime Power Mode Operation, for information on
enabling prime power mode.
Terminal
Strip Description
TB1/TB3 Terminal strip for connecting generator set
accessories such as an emergency stop switch, a
remote start/stop switch, audiovisual alarms, etc.
Refer to the wiring diagrams for information on
connecting accessories to the TB1 terminal strip.
TB2 Terminal strip for selecting the remote start/stop
switch inputs and prime power mode.
P3/P7 Communication module connection for remote serial
annunciator (RSA) or network communication.
P21 RS-485 communication connection for Modbusr to
download new application program software or for
connecting the remote serial annunciator.
P22 CAN (engine) communication connection.
Figure 1-7 Controller Terminal Strips/Connections
1
8
9 7
1. TB1 (TB1A) terminal strip
2. TB3 (TB1B) terminal strip
3. TB2 terminal strip
4. P3 annunciator panel lamp and RSA communication
module connections
5. P21 for Modbusr RS-485 communication connection
6. P22 for CAN (engine) communication connection
7. SW1 DIP switch (8 positions)
8. P7 RSA communication module connection
9. Fuses
Figure 1-8 Controller DIP Switches
2 3
GM28725-
4
6 5
TP-6161 1/12