7.2 Motor Voltage and DC Tach-Generator Selection –
Jumper J2 is factory set to the “90V” position on
Catalog No. BC141, for 90 Volt DC motors, and set to
the “180V” position, on Catalog Nos. BC142, 142-6,
for 180 Volt DC motors. To set Catalog No. BC142,
142-6 for step-down operation (208/230 Volts AC line
input and 90 Volt DC output), set Jumper J2 to the
“90V” position). To set the control for tach-generator
connection, set Jumper J2 to the “T” position (all
models). See Figure 12.
Notes: 1. On Catalog No. BC141, the “180V” position is not available on Jumper J2. 2. On Catalog No.
BC142-6, do not set the output voltage to 180 Volts DC when the AC line input is set to 115 Volts.
FIGURE 11 – AC LINE INPUT VOLTAGE SELECTION
(JUMPER J1)
8 AC LINE FUSING
A 25 Amp AC line fuse is factory installed in the AC line fuse holder as shown in Figure 1, on page 10. It is rec-
ommended that a 12 Amp AC line fuse be installed for motors rated 7.5 Amps DC or less. Fuses should be nor-
mal blow ceramic 3AG, MDA, or equivalent. On domestic 230 Volt AC lines, separate branch circuit protection for
Catalog No. BC141 Catalog Nos. BC142 and BC142-6
J2 Set for
90 Volt Motor
(Factory Setting)
J2 Set for
Tach-Generator
J2 Set for
180 Volt Motor
(Factory Setting)
J2 Set for
90 Volt Motor
(Step-Down)
J2 Set for
Tach-Generator
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