Curtis PMC 1209B/1221B/1221C/1231C Manual
13
WIRING
WIRING
CONNECTIONS: Low Current
Three 1/4" push-on terminals are provided for the
low current connections: one for the KSI (keyswitch
input) and two for the throttle inputs. If your con-
troller has a voltage throttle input, there will be only
one throttle terminal.
For the control wiring, 0.75 mm
2
(#18 AWG)
vinyl insulated stranded wire is recommended.
CONNECTIONS: High Current
Four tin-plated solid copper bus bars are provided for the high current connec-
tions to the battery and motor.
The cables used for the battery and motor connections must be heavy enough to
carry the high current required. Rubber insulated welding cable is convenient to
work with because of its flexibility.
Connections to the controller bus bars should be made with lugs suitable for
the cable used, fastened by M8 (5/16") bolts and nuts. When tightening the
bolts, two opposing wrenches should be used. Failure to use the double-
wrench technique could cause undue strain to be placed on the internal connec-
tions, and could also result in cracked seals around the bus bars.
3
A2
M-
B-
B+
Positive connection to battery
and to motor armature
Plug diode to motor armature
Negative connection to battery
Output to motor field
throttle
inputs
KSI
3
1
2
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