1
®
SD-13-4784
Bendix
®
EC-14
™
AntiLock Controller Assembly
FIGURE 1 - EC-14
™
ANTILOCK CONTROLLER ASSEMBLY
DESCRIPTION
GENERAL
Bendix trailer antilock systems utilizing the EC-14
™
electronic controller assembly provide axle braking control
for buses, trucks, and truck trailers. By controlling "wheel
lock-up" during aggressive braking, the trailer retains a high
degree of stability and steerability while braking, and vehicle
stopping distance may be reduced.
In order to provide axle control antilock, the EC-14
™
controller
is used in combination with the following components:
•
Four individual wheel speed sensors.
•
One combination modulator-relay valve.
•
One stand alone modulator valve.
•
Antilock condition lamp (dash mounted).
PHYSICAL
The EC-14
™
controller electronics, which regulate the function
of the antilock system, are contained in a die cast aluminum
housing and are environmentally protected by silicone
encapsulation. The metal housing, coupled with the design
of the digital electronics, is intended to provide a high degree
of protection from radio and electromagnetic interference.
A diagnostics display window with 9 light emitting diodes
(LEDs) and a magnetically actuated Reset switch is
incorporated in the housing for troubleshooting and
diagnostic purposes.
Two electrical connectors are currently used on the EC-14
™
controller, one for connection to the antilock system
components (30 pin, Packard Electric, 150 series "Metri-
pack”) and one for connection to a combination
modulator-relay valve (4 pin, Molex).
MOUNTING
The EC-14
™
controller is specifically designed to be mounted
to a modulator-relay valve assembly, such as the Bendix
®
M-12
™
modulator (reference SD-13-4772). When the
EC-14
™
controller is mounted on a modulator assembly the
30 PIN WIRE
HARNESS CONNECTOR
DIAGNOSTICS
WINDOW
MOUNTING HOLES (4)
