Bendix Commercial Vehicle Systems EC-13 TRAILER ANTILOCK CONTROL 8/07 - Manual

1
SD-13-4783
Bendix ® EC-13 ™ Trailer AntiLock Controller Assembly
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 ™ and one M-12R ™
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.
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 ™ controller can be remote bracket mounted to a
frame member or can be mounted directly on a modulator-
relay valve assembly, such as the Bendix
® M-12 ™ modulator
(reference SD-13-4772). When the EC-13 ™ controller is
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 ™ controller
plus M-12 ™ modulator) is known as a MC-13 ™ modulator
controller (see Figure 3). When the EC-13 ™ controller is
bracket mounted to a frame member, and not mounted
on the modulator, an M-12R
™ modulator is used. The
M-12R ™ modulator is identical to the M-12 ™ modulator but
has remote mounting capabilities (see Figure 6).
DIAGNOSTIC
WINDOW 30 PIN WIRE HARNESS
CONNECTOR
EC-13 ™ Trailer AntiLock Controller
FIGURE 1 - EC-13 ™ TRAILER ANTILOCK CONTROLLER
MOUNTING HOLES (4)