C.E. Niehoff & Co. C701/C701A Troubleshooting Guides - Manual (Page 2)

Page 2
TG3E
Section A: Wiring Diagram
CEN C701/C701A Alternators
Description and Operation
C701/C701A 28 V, 300 A alternators are internally recti-
fied. All windings and current-transmitting components
are non-moving, so there are no brushes or slip rings to
wear out. Energize switch activates regulator. Field coil
is then energized. Regulator maintains alternator output
voltage at regulated setting as vehicle electrical loads are
switched on and off. Alternator output current is self-
limiting and will not exceed rated capacity of alternator.
A2-213 regulator furnished with most units has D+
terminal that can provide signal to vehicle electrical
system, confirming alternator operation. Regulator also
has a P terminal that can provide an optional AC voltage
tap. Regulator also provides overvoltage cutout (OVCO).
Regulator also has a green lens LED (see page 4).
Figure 2 — C701 and C701A Alternator with Regulator
B– Terminal
B+ Terminal
D+ Terminal
IGN Terminal
Figure 1 — C701 and C701A




P Terminal

*Thermal switch is not
factory-installed on all models.

Green lens
LED
IGN
P
A2-213
REGULATOR
GREEN LENS LED

D+