Cen C850 - Page 2

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Page 2
TG97A
Section A: Description and Operation
Figure 3: C850 Alternator with Regulator, Wiring Diagram
C850 Alternator
Description and Operation
The CEN C850 28 V (550 A) alternator is an internally-
rectied,brushlessalternator.Allwindingsandcurrent-
carrying components are stationary, so there are no
brushes or slip rings to wear out.
Voltage regulator is activated when it receives an igni-
tion/energize signal from vehicle usually via oil pressure
switch or multiplex system. The regulator monitors alter-
natorshaftrotationandprovideseldcurrentonlywhen
it detects the alternator shaft rotating at a suitable speed.
After the regulator detects shaft rotation, it gradually
applieseldcurrent,preventinganabruptmechanical
load on accessory drive system. Soft start may take up to
20 seconds after rotation and energize signals are
sensed.
Refer to Figure 1 for alternator terminal locations. Refer
to Figure 2 for alternator-to-regulator harness plug socket
outputs.
Figure 1: C850 Alternator Terminals
B– terminal
B+ terminal
A D
B C
1
2
3
4
A = B+
B = F1+
C = F2+
D = B+
1 = B+ Sense
2 = B–
3 = Phase (AC)
4 = Temp Sense
Figure 2: Alternator-to-Regulator Harness Plug Socket Outputs
NOTES:
1. Voltage drop at 550 amps between B+ terminal and battery shall not exceed 0.4 Volts. Ground cable should follow the same rule.
2. Connections to terminals “Phase,” “D+,” and to connector 2 are optional
B– terminal