BENDIX EC-13 TRAILER ANTILOCK CONTROL Manual
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®
™
Bendix
EC-13
MOUNTING HOLES (4)
DIAGNOSTIC
WINDOW
™
FIGURE 1 - EC-13
TRAILER ANTILOCK CONTROLLER
DESCRIPTION
GENERAL
Bendix trailer antilock systems utilizing the EC-13
electronic controller assembly provide AXLE braking control
for 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-13
controller is used in combination with the following
components;
-
Four, individual wheel speed sensors
™
-
Two M-12R
remote mount modulator-relay valves
or a combination of one M-12
modulator
PHYSICAL
™
The EC-13
controller assembly 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.
Trailer AntiLock Controller Assembly
™
EC-13
™
and one M-12R
Trailer AntiLock Controller
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.
™
A single electrical connector is currently used on the
™
EC-13
controller, for connection to the antilock system
components; a 30 pin, Packard Electric, 150 series "Metri-
pack."
MOUNTING
™
The EC-13
™
frame member or can be mounted directly on a modulator-
relay valve assembly, such as the Bendix
(reference SD-13-4772). When the EC-13
mounted on a modulator assembly the resulting assembly
™
receives a different designation. For example when the
™
EC-13
antilock controller is mounted on the M-12
modulator the resulting assembly (i.e.; EC-13
™
plus M-12
controller (see Figure 3). When the EC-13
bracket mounted to a frame member, and not mounted
on the modulator, an M-12R
M-12R
™
modulator is identical to the M-12
has remote mounting capabilities (see Figure 6).
30 PIN WIRE HARNESS
CONNECTOR
controller can be remote bracket mounted to a
modulator) is known as a MC-13
™
modulator is used. The
®
M-12
™
modulator
™
controller is
™
™
controller
™
modulator
™
controller is
™
modulator but
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