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Pin detail for Fig. 18
—KSI input
P1
—F/R output
P2
—Bypass output
P3
(n/c)
P4
—FWD input
P5
—REV input
P6
POWER
KEYSWITCH
SWITCH
POWER SUPPLY
(to match your controller)
POTBOX
(to match your controller's
throttle output)
Setup for bench testing.
Fig. 18
Curtis PMC 1204X/1205X/1209/1221 Manual
• FORWARD/REVERSE CONTACTORS and a single-pole,
center-off FORWARD/REVERSE SWITCH.
• a BYPASS CONTACTOR if one is used in the vehicle.
• a TEST LOAD consisting of incandescent light bulbs wired in
series to get the same voltage as your power supply. (For example,
with a 36 volt battery, use three 12 volt bulbs.)
• a FAULT SWITCH (a simple on/off switch) to simulate a fault
condition.
• a general purpose VOLT OHMMETER or DIGITAL VOLT-
METER.
MAIN
CONTACTOR
FAULT
SWITCH
TROUBLESHOOTING & BENCH TESTING
F/R SWITCH
FORWARD
REVERSE
F/R CONTACTOR
FWD
REV
12V
12V
TEST LOAD
(to match battery voltage)
BYPASS
CONTACTOR
12V
33
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