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Alternate Wire Rope Exit

E1

E2

E3

NOTE
Mount with Ø.25 or M6 
Socket Head Cap Screws.

Alternate Wire Rope Exit

NOTE
Mount with Ø.50 or M12 Socket Head Cap Screws.

RANGE

“A”

“B”

“C” 

2”, 10”

1.12 (28.4)

1.79 (45.5)

1.21 (30.7) 

3”, 15”, 30”         .96(24.4)

1.95 (49.5)

1.37 (34.8) 

4”, 20”, 40”         .80 (20.3)

2.11 (53.6)

1.53 (38.9) 

5”, 25”, 50”         .64 (16.3)

2.27 (57.7)

1.69 (42.9) 

60”

.49 (12.4)

2.42 (61.5)

1.84 (46.7) 

80”

.25 (6.4)

2.66 (67.6)

2.08 (52.8)

Alternate Wire Rope Exit

Note:  Di men sions in 
brackets are mil li me ters.

Dimensional Information

HX-VP420 Series Installation Guide

Wiring and Circuit Diagram

Velocity
The tachometer is self en er giz ing and requires 
no input voltage.

shielded cable between the transducer and the 
electrical interface.  The shield of the cable 
should be open at the transducer and ground ed 
at the electrical interface.
With small blade type screwdriver (.105" 
max. blade width X .023" max. blade thick-
ness), ad just the 

Zero

 and 

Span

 con trols on 

the trans duc er to set the 4 and 20 mA output 
limits. 

Note:

 The

 Zero

 and 

Span

 con trols 

are some what in ter ac tive and may re quire 
several it er a tions to ob tain the de sired zero 
and maxi-

Model HX-VP420

The 4 to 20 mA output transducer is a 2-wire, 
loop pow ered de vice. The transducer,  pow er 
supply, and cur rent monitor must be con nect ed 
in series as illustrated above.
The minimum supply voltage is a function of 
total loop resistance. It may be calculated us ing 
the formula:
 

V(Min.)= (0.02 x Load Res.) + 9 VDC

It may also be determined from the ac com -
pa ny ing graph, shown at right.
When mounting, insure that the baseplate of the 
transducer is grounded to earth ground.  For best 
noise immunity, use twisted pair 

mum settings. Ex tend the trans duc er's cable (on 
an gu lar position transducers, ro tate shaft) to the 
desired zero po si tion (must be with in 0% to 30% 
of range).  Adjust the 

Zero 

con trol so that  the  

output cur rent is 4 mA. Then extend the ca ble (on 
angular position trans duc ers, ro tate shaft) to the 
de sired max i mum position (must be within 80% 
to 100% of range).  Ad just the 

Span

 con trol for 

max i mum out put cur rent of 20 mA. Re check the 
zero set ting and adjust if nec es sary. Re check the 
Span setting and readjust if nec es sary. 

Via Paolo Uccello 4  -  20148 Milano   

Tel +39 02 48 009 757   Fax +39 02 48 002 070      [email protected]   www.dspmindustria.it

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