C.E. Niehoff & Co. C510/C540 Troubleshooting Guides User Manual

Page 3

Page 3

TG1B

Section B: C540 Wiring Diagrams

Figure 4 — C540 Terminal Locations

IGN

B+ terminal bolt –

torque to 30 Nm/22 lb. ft.

Battery output cable terminal

Washer

Lockwasher

Insulator

 



B– terminal bolt –

torque to 30 Nm/22 lb. ft.



Screws –

torque to 6.7 Nm/60 lb. in.



P and IGN terminal nuts –

torque to 3.4 Nm/30 lb. in.



Field inline connection



Field

inline

connection



B+

(see

inset above)



B+ Terminal Connection

Phase terminal bolts (3 places) –

torque to 8 Nm/70 lb. in.

Cable bracket

LOC. A



Cable bracket

LOC. B



Phase

cable



Cable bracket

LOC. C

CEN C540 Alternator

Description and Operation

C540 14 V (300 A) 3-phase brushless alternator uses an

externally mounted rectifier and regulator. All windings
and current-transmitting components are non-moving,
so there are no brushes or slip rings to wear out. This
units is externally energized through an energize switch,
which activates regulator. Field coil is then energized.
Regulator maintains alternator output voltage at regu-
lated setting as vehicle electrical loads are switched on
and off. Alternator output current is self-limiting and
will not exceed rated capacity of alternator.
A2-136 external regulator furnished with all units has

R terminal for optional AC voltage tap. Optional 15.5 V
regulator setpoint is available for battery isolator appli-
cations.
A8-205 external rectifier allows for mounting in engine

compartment. A8-205 rectifier suppresses electromag-
netic interference (EMI) with internal filters to acceptable
levels defined by the Society of Automotive Engineers
(SAE) specification J1113/41. A8-205 rectifier will not
reduce EMI from sources such as antennas, poor cable
routing practice, or other electronic devices that cause
EMI. If EMI continues, consult an electromagnetic com-
pliance (EMC) specialist to determine EMI source.

Figure 3 — C540 Wiring Diagram

Alternator

Regulator

Rectifi er