Owner manual
9
III. SETTING AC LINE AND MOTOR VOLTAGE.
The KBPI is factory set to operate with a 230VAC - 50/60 Hz AC line input and a 180-VDC PM
motor. By utilizing jumpers J2A, J2B and J3 on the main PC board and Jumper J1 on the
logic PC board, different AC line voltage/motor voltage combinations can be achieved.
A. FACTORY SETTING: 240 VOLTS AC LINE INPUT WITH 0-180 VDC OUTPUT:
Jumpers J2A, J2B on main PC board set to “240”
Jumper J3 on main PC board set to “240”
Jumper J1 on logic PC board set to “240”
B. 120 VOLTS AC LINE INPUT WITH 0-90 VDC OUTPUT:
Jumpers J2A, J2B on main PC board set to “120”
Jumper J3 on main PC board set to “120”
Jumper J1 on logic PC board set to “120”
C. 240 VOLTS AC LINE INPUT WITH 0-180 VDC OUTPUT (STEP-DOWN):
Jumpers J2A, J2B on main PC board set to “240”
Jumper J3 on main PC board set to “120”
Jumper J1 on logic PC board set to “240”
The above information is summarized in table 4.
TABLE 4 – Relationship of AC Line Input and Motor Voltage with Jumper J1
on Logic Board and Jumpers J2 and J3 on Power Board (All Models)
AC Line
Voltage
(VAC
–50/60Hz)
J1 Position
Logic Board
J2A, J2B Position Power
Board
Motor
Voltage
(VDC)
J3 Position on
Power Board
120 120V 120V, 120V 90V 90V*
240 240V 240V, 240V 180V 180V
240 240V 240V, 240V 90V* 90V
*Denotes step-down operation. A 90 VDC motor used on a 240 VAC line input.
Note: Motor performance and brush life may be affected.
IV. SETTING MOTOR CURRENT (JUMPER J1)
Jumper J1 is used to set the range of armature current which can be further modified with the
current limit (CL) trimpot. The factory setting of J1 is 10 amps. The CL trimpot is factory set
to provide 150% of the J1 setting. For example, when J1 is in the 10 amp position, the actual
armature current is 15 amps. When J1 is in the 5 amp position, the control provides a
maximum armature current of 7.5 amps. The position of J1 should be set to the approximate
DC motor current rating. Table 5 is provided as a reference. (See fig. 1b, p. 5 for location of
jumper J1.)
TABLE 5 – JUMPER J1 SETTING vs MOTOR HORSEPOWER
Jumper J1*
Motor Horsepower Range
90 VDC 180 VDC
10A 3/4 – 1 1 – 2
5A Ω 1
3.3A 1/4 – 1/3 1/2 – 3/4
2A 1/6 1/3
*Note: Jumper J1 is shown in the factory setting.