6
TABLE 2
Signal Input Selection (Jumpers)
Input
Terminals
J4
J5
J6
J7
1-5 V
1 & 3
Out
1-5 mA
1 & 2
Out
Out
In
In
4-20 mA
1 & 2
Out
In
Out
In
10-50 mA
1 & 2
In
Out
Out
In
Remote
Auto Manual
Out
3.2 Features
Current Output Signal
A 4-20 mA output signal is provided for remote monitoring of stroke length. This
signal is generated by a voltage to current converter which is driven directly by the
feedback potentiometer. This source can drive an impedance of up to 250 ohms. The
ranges of the current outputs are adjustable on the circuit board by adjusting the zero
and span trim potentiometers.
Manual Override
By moving the manual override switch to the manual position, stroke length control
can be accomplished by hand turning the micrometer knob.
Signal Loss Detection
The circuit board can be configured suck that if a loss of input signal occurs, it will
maintain the stroke length at the position of the last given signal or drive the stroke
length to zero.
Over Signal Protection
The circuit board disregards out-of-rang signals which can lead to problems with
over-driving.
NEMA Type 7
UL Listed enclosure for Class 1, Groups C & D
3.3 Options
Pneumatic Input Signal
This option allows the use of a 3-15 PSI pneumatic input signal to control stroke
length. An integral pressure transducer converts the pneumatic signal to a 1-5 V
voltage signal, thus controlling stroke length.
Ratio Control
This option establishes a "ratio" between the input signal and resulting stroke length.
This ratio can range from 100%:100% to 100%:0%. The ratio is infinitely adjustable
over this range by adjusting a remote potentiometer.
Summary of Contents for ELMA NEMA 4X
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Page 22: ...20 7 1 NEMA Type 4X Cross Section ...
Page 23: ...21 7 2 NEMA Type 4X Exploded Isometric ...
Page 24: ...22 7 3 NEMA Type 7 Cross Section ...
Page 25: ...23 7 4 NEMA Type 7 Exploded Isometric ...
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