Ce-niehoff-co N1233 Troubleshooting Guides Instrukcja Użytkownika Pobierz pdf (Strona 2)

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TG0021A

Section 1: Wiring Diagrams

Figure 2 — N1233-2 Alternator with N3140 Regulator

Figure 1 — N1233-2 Alternator Terminals

(N3140 Regulator Attached to Alternator)

B– terminal

stud

D+ terminal

E terminal

B+ terminal stud

(on rear of

control unit)

R terminal

CEN N1233-2 Alternator

Description and Operation

N1233-2 28 V (260 A) alternator is self-rectifying.

All windings and current-transmitting components

are non-moving, so there are no brushes or slip rings

to wear out.

When controlled by the N3140 regulator, this alter-

nator becomes externally energized through the E

terminal, connected to a switched power source to

turn on regulator. See wiring diagram. N3140 regula-

tor has:

• D+ terminal to provide signal to vehicle electrical

system, confirming alternator operation.

• R terminal to provide an optional AC voltage tap.

• overvoltage cutout (OVCO). Regulators with OVCO

(overvoltage cutout) will trip at vehicle electrical

system voltages above 33 volts that exist longer

than 3 seconds. OVCO feature detects high

voltage and reacts by signaling relay in F+

alternator circuit to open. This turns off alterna-

tor. Restarting engine resets OVCO circuit.

Regulator regains control of alternator output

voltage.

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Ce-niehoff-co N1233 Troubleshooting Guides Instrukcja Użytkownika Strona 2