GE IC3645SP4U400N3 User Manual

BASIC OPERATION AND FEATURES

SX TRANSISTOR CONTROL

Page 10

January 2000

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= Three speeds, adjustable from O to 100% motor

volts. Fixed speeds actuated by switch closure to

negative.

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= Current limit and controlled acceleration adjustable.

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= Battery Discharge Indicator interrupt compatible.

Operation of voltage regulator card: This card provides the

basic functions required for controlling the pump control,

optional contactors, and PMT functions. Battery positive is

applied through a main control fuse to the key switch,

energizing the control card power supply input to P1.

When a pump contactor is used, PMT operation is the

same as outlined for the traction controllers.

The three speed (motor volts) reference points P12, P19,

and P20 are selected by connecting these points

independently to battery negative.

The first speed is obtained by closing Speed Limit I (P12) to

control negative. SLl is adjustable by Function 11 using the

Handset to adjust motor voltage from O to 100%. The

specified motor volts will be regulated, however, the

magnitude of motor current will vary depending on the

loading of the vehicle.

The second speed is obtained by closing SL2 (P19) to

control negative. SL2 is adjusted using the Handset and

Function 12 similar to SL1.

The third speed is obtained by closing SL3 (P20) to control

negative. SL3 is adjusted using the Handset and Function

13 similar to SL1.

If more than one Speed Limit is activated, the selected

speed with the highest motor volts will override the low

motor volt speed. The current limit circuit is adjustable and

operates the same as the traction current limit.

The controlled acceleration circuit is adjustable and

operates the same as the traction circuit. Adjustment range

is from 0.1 to 5.5 seconds.

The Battery Discharge Indicator (BDI) interrupt will disable

the hydraulic controller if the connection at P10 loses the

12 volt signal from the traction control. BDI interrupt can be

disabled by Function 17 using the Handset. Select card type

with or without BDI function.