Crown 1160ma Guía Del Usuario

The Fault (RJ-11) jack, which looks like a tele-
phone plug, is located on the back of your CH 
or CL amplifier (Figure 4.2). It gives you an 
easy way to remotely monitor the amplifier’s 
fault status. To set up a circuit that will cause an 
LED to light whenever a fault status occurs, you 
can simply use the suggested circuit shown in 
Figure 4.3.

When using this circuit, the LED will glow 
whenever the amplifier is in one of four states: a 
channel’s heatsink has reached its temperature 
limit, the transformer has reached its tempera-
ture limit, the amplifier has just been turned on 
and is in its turn-on-delay mode, or the ampli-
fier is turned off.

If you choose to design your own circuit to 
interface this signal to your system, note that 
this RJ jack is polarity sensitive. Pin 2 must be 
grounded, and Pin 5 must be supplied with a 
positive voltage pull up (positive with respect 
to ground). Refer to Figure 4.4 for RJ jack pin 
assignments. The maximum signal that can be 
exposed to the fault jack is 35VDC and 10 mA. 
Best results are obtained with 10 mA LEDs.

The mating connector for the RJ-11 jack con-
tains 4 contact pins in a 6-slot case, as shown. 
For additional information please contact your 
local dealer or Crown Technical Support.