Beck, R&J Automobile Parts 14-10 Benutzerhandbuch

19

 

Two basic types of control are available:  

120 V ac contact closure (options 3, 4, 5, and 6) 
and milliamp or dc analog modulating (options 7 
and 8).  Each option is described below.

For simple 2-position 

control using manual push-buttons or an 
automatic controller.  Preset travel limit switches 
provide open / close operation upon closure of an 
automatic controller or manually operated switch.  
Travel limits are adjustable over the full range of 
travel and have a repeatability of 0.1°.
 

 Adjustable, cam 

operated switches provide up to five discrete stop 
positions upon closure of an automatic controller 
or manually operated switch.  Three, four, and 
five predetermined position settings are possible, 
with positioning repeatability of 1° over the range 
of operation.
 

Operated in forward 

/ reverse from a remote location; includes a 1,000 
ohm film potentiometer for remote feedback.
 

 Provides 

continuous positioning capability over the full 
range of drive travel by direct ac from either 
an automatic controller or manually operated 
switches.  Includes Contactless Position Sensor 
(CPS-2) for feedback and position indication.
 

 For automatic operation 

in response to milliamp or V dc analog control; 
includes a film potentiometer for position sensing 
and feedback to the Electronic Signal Receiver 
(ESR-4).
 

 For automatic operation, 

as in option 7, above; includes Contactless 
Position Sensor (CPS-2) for position sensing and 
feedback to the ESR-4.

 

Beck modulating drives are equipped with 

precision electronic control modules (ESR-4) 
to receive conventional 4–20 mA or 1–5 V dc 
control
signals directly, eliminating the need for contact 
protection devices, relays, switches, and revers-
ing starters.
 

The ESR-4 provides for drive control with 

analog control systems, and is designed to 
operate continuously in temperatures up to 
185°F.
 

A feedback signal from either the CPS-2 or 

a  film potentiometer is compared to the input 

 

Every Beck Group 14 linear drive is furnished 

with a Handwheel for operation of the valve 
without electrical power.  Its solid construction 
design includes no spokes or projections, and 
turns at a safe, slow speed.  The Handwheel 
is located at the bottom of the control motor 
housing.  The Handwheel is coupled directly 
to the motor shaft and rotates when the motor 
runs.  Manual operation of the Handwheel (with 
electric Handswitch in STOP position) turns 
the motor and the rest of the drive train without 
incorporating a clutch.

 

A local electric Handswitch is provided on 

Beck drives to permit operation at the valve, 
independent of the controller.  As a safety feature, 
the Handswitch is designed so that the controller 
can operate the drive only when it is in the AUTO 
position.  The sequence of the Handswitch is:  
AUTO, STOP, RETRACT, STOP, EXTEND.
 

In the AUTO position, two contacts are closed 

and the ESR-4 or external controller contact 
completes the control circuit.
 

In the RETRACT or EXTEND positions, 

contacts are closed to operate the drive 
independently of the controller.
 

In the STOP position, all contacts remain open.

 

Two end-of-travel switches and up to four 

optional auxiliary switches are provided on Group 
14 drives.  Switch cams are clamped onto the 
control shaft, which rotates in relation to the output 
shaft.  Cam position is field-adjustable.  Switches 
are enclosed in high-impact thermoplastic.  
Switches are rated 6 A, 120 V ac (0.5 A, 125 V 
dc).  All auxiliary switch connections are made on 
the terminal board.