KB Electronics KBRG-255 - Manual (Page 9)

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FIG. 2A – LINEAR TORQUE CURVE
FIG. 2B – NON-LINEAR TORQUE CURVE
III. SETTING SELECTABLE JUMPERS.
The KBRG-255 has customer selectable jumpers which must be set before the control can be
used (refer to fig. 1 p. 3). Bold indicates Factory Setting. (See sec. II, p. 4 for J7 and J8
settings.)
A. J4 - Tach-generator Voltage – (Note: Selection of the jumper position is not required if
armature feedback is used.) Place J4 jumper in the position "7V", "20/30V," "50V" that
corresponds to the tach-generator voltage in Volts/KRPM. Note: The tach voltage jumper
position is based on motor speed of 1,800 RPM.