Beck, R&J Automobile Parts 14-10 Manual De Usuario

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signal.  The difference between these signals—
the error—is amplified and used to actuate either 
of two electronic motor power switches.  These 
switches drive the motor in the proper direction 
to force the error to zero.  The input signal is 
adjustable from 50% to 400% of the 4 volt span, 
with the zero adjustable from -100 to +275% of 
span.
 
The ESR-4 permits two or more Beck drives 
to be operated by a single signal source, for 
series, parallel, or split range operation.  See 
page 15 for details on these control options.
 
The ESR-4 board requires a feedback signal 
source.  Either the Contactless Position Sensor 
(CPS-2) or a Film Potentiometer can be provided 
for this purpose.  The CPS-2, with a monitor / 
isolator board, produces an isolated position 
feedback signal for the ESR-4 board.  The 
Monitor function monitors the CPS-2 position 
signal and compares it to established limits.  If 
the output exceeds normal signal conditions, 
the monitor relay contact opens.  This relay may 
be used for either a remote signal indication 
or activation of Loss of Signal operation of the 
drive.
 
I
NPUT
:  ESR-4, 
CONT
D
.
POSITION FEEDBACK:
CONTACTLESS POSITION 
SENSOR (CPS-2)
 
The CPS-2 provides a continuous feedback 
signal proportional to the position of the drive’s 
output shaft.  It is used for remote position 
indication as well as for automatic control loop 
feedback to the Electronic Signal Receiver 
(ESR-4).  When used with the ESR-4, the CPS-2 
includes a monitor / isolator board that delivers 
an isolated position feedback signal to the 
Electronic Signal Receiver (ESR-4).  The Monitor 
function monitors the CPS-2 position signal and 
compares it to established limits.  If the output 
exceeds normal signal conditions, the monitor 
relay contact opens.  This relay may be used for 
either a remote signal indication or activation of 
Loss-of-Signal operation of the drive.
 
The position sensing function of the CPS-2 is 
provided by a ferrite magnetic sensing element 
consisting of two parts:  A ferrite stator mounted 
on the CPS-2 circuit board and a ferrite rotor 
mounted on the control shaft, driven by the Beck  
drive’s output shaft through the Calibar assembly.  
The electronic circuit translates the signal from 
the ferrite magnetic sensor into an analog 
position feedback signal designed to interface 
with electronic control systems and indicating 
instruments.
OPERATION