BENDIX SD-13-4783 ユーザーズマニュアル

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

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.”

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

MOUNTING HOLES (4)