Page 2 tg8b, P1 p2 p3 e or ign – C.E. Niehoff & Co. C619/C630/N1222/N1223/A1-607/A1-608 Troubleshooting Guides User Manual

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TG8B

Section A: Wiring Diagrams

Figure 2 — Alternator Wiring Diagram

CEN C630/C619/N1222/N1223/A1-607/A1-608

Alternators Description and Operation

The

C630 alternator (14 V, 350 A), C619 alternator

(14 V, 340 A),

N1222/A1-608 alternators (14 V, 290 A)

and

N1223/A1-607 alternators (14 V, 250 A) are inter-

nally rectified. All windings and current-transmitting

components are non-moving, so there are no brushes or

slip rings to wear out. This unit is externally energized

through either an ignition switch or an energize switch

(commonly an oil pressure switch), which activates regu-

lator. Field coil is then energized. Regulator maintains

alternator output voltage at regulated setting as vehicle

electrical loads are switched on and off. Alternator out-

put current is self-limiting and will not exceed rated

capacity of alternator.
A2-121 regulator used with all units has a 15.5 V regula-

tor setpoint available for battery isolator applications.
Electromagnetic interference (EMI) is suppressed with

internal filters to acceptable levels defined by the Society

of Automotive Engineers (SAE) specification J1113/41.

A2-121 regulator will not reduce EMI from sources such

as antennas, poor cable routing practice, or other elec-

tronic devices that cause EMI. If EMI continues, consult

an electromagnetic compliance (EMC) specialist to

determine EMI source.

Figure 1 — Alternator with A2-121 Regulator

B– Terminal

B+ Terminal



B+

F+

B–

ALTERNATOR

RECTIFIER

FIELD

REGULATOR

LOAD

TTER

STATOR

ENERGIZE
SWITCH



E or IGN

F+ Terminal

or IGN