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Cable-Extension Position Transducer
Short to Medium Range
4...20 mA Output
PT420
The PT420 is available with full-scale measurement ranges from 2 to 100 inches, providing a 0/4-20 mA feedback signal that is linearly proportional to the position of a traveling stainlesssteel extension cable. Use the PT420 to provide position feedback on hydraulic cylinders in factories and utilities, gate position in fresh or wastewater distribution systems, or valve opening in process-related applications.
Specifications:
GENERAL
Full Stroke Ranges ................................... 0-2 to 0- 100 inches, see ordering info.
Output Signal .................. 4 - 20 mA (2-wire), 0 - 20 mA (3-wire), see ordering info.
Sensitivity, 2-wire ......................................................... 16 mA/full stroke,
±
0.25%
Sensitivity, 3-wire ......................................................... 20 mA/full stroke,
±
0.25%
Accuracy
2 and 5 Inch Ranges ..............................................................
±
0.28% full stroke
10, 15, 25 Inch Ranges ...........................................................
±
0.18% full stroke
20, 30 Inch Ranges and Greater .............................................
±
0.15% full stroke
Repeatability ..................................... greater of
±
0.001 inches or 0.02% full stroke
Resolution ................................................................................. essentially infinite
Measuring Cable .................................. 0.019-in. dia. nylon-coated stainless steel
Cable Fitting ............................................................................... crimp and swivel
Enclosure Material ................................... powder coated and anodized aluminum
Sensor ...................................................... plastic-hybrid precision potentiometer
Weight ................................................................................................ 2 lbs., max.
ELECTRICAL
Input Voltage .................................................................................... 12 to 40 VDC
Input Current ...................................................................................... 20 mA, max.
Loop Resistance (Load) ............................. (loop supply voltage - 12 ) / 0.02, max.
Circuit Protection ........................................................................ 38 mA maximum
Impedance ................................................................... 100 M
Ω
@ 100 VDC, min.
Zero and Span Adjustment ............................................................... 2:1 turndown
Electrical Connector .................................................................. MS3102E-14S-6P
Mating Plug (included) .............................................................. MS3106E-14S-6S
ENVIRONMENTAL
Enclosure Design ..................................................................................... NEMA 1
Operating Temperature .................................................................. -40 o F to 180 o F
Thermal Effects
Zero ........................................................................... 0.01% full stroke / o F, max.
Span .......................................................................................... 0.01% / o F, max.
Vibration .................................................................. up to 10 G's to 2000 Hz max.
MECHANICAL
Measurement Range
(Inches)
0- 2, -10, -20
0- 5, -25, -50
0-15, -30
0-40
0-60
0-75
0-100
Cable Tension
(Ounces,
±
30%)
12
5
8
6
13
10
13
Max. Cable Acceleration
(Gravities)
4
3
2
11
2
3
4
The PT420 installs in minutes by mounting its base to a fixed surface and attaching its cable to the movable object. The PT420 works without perfect parallel alignment, and when its stainless steel cable is retracted, its height is less than 5".
20 mA
4 mA
Electrical Output: full retraction full extension normal output reversed output www.celesco.com
Celesco Transducer Products, Inc.
20630 Plummer Street • Chatsworth, CA • 91311 tel: (800) 423-5483 • (818) 701-2750 fax: (818) 701-2799 e-mail: [email protected]
60
PT420 Short to Medium Range • 4...20 mA Output Signal
outline drawing (2 thru 50 inch f.s. ranges)
2 "
R A N G E
, 1
" A "
0 " , 2
D
0
I M
"
E N
I N
S I O N
C H
1 .
3 4
E S ( M M )
( 3 4 .
0 )
5 " ,
1
2 5 " ,
5 " ,
5 0 "
3 0 "
1
1
.
.
8
5
3
6
(
(
4
3
6
9
.
.
8
6
)
)
4 0 " 1 .
6 3 ( 4 1 .
4 )
A L L D I M E N S I O N S A R E I N
I N C H E S ( M M ) t o l e r a n c e s u n l e s a r e + 0 .
0 2 i n .
s o t h e r w i s e
( + 0 .
5 m m ) n o t e d
2.00 (50.8)
0.20 (5.1) dia. thru
[4 places]
"A"
Electrical:
12...40 VDC IN
4...20 mA OUT
Sensing Circuit
2.50 (63.5)
4.00 (101.6)
7.00 (177.8) top rear
2.25 (57.12)
MS3106E-14S-6S
A
B
C
D
F
E contact view
Mating Plug
5/16" (8 mm) max cable dia.
16 AWG max wire size
~ 3.2 in. (81 mm)
2.29 (58.22)
1.23 (31.2)
2.62 (66.5)
Ordering Information / Model Number:
0.19 (4.8)
PT420
order code:
Full Stroke Range
0002 = 2 inches
0005 = 5 inches
0010 = 10 inches
0015 = 15 inches
0020 = 20 inches
0025 = 25 inches
-
7.50 (190.5)
Instrumentation Cable
MULTICONDUCTOR, 24 GA., SHIELDED
~0.2 in. (5 mm) dia.
A
1
B
0030 = 30 inches
0040 = 40 inches
0050 = 50 inches
0060 = 60 inches
0075 = 75 inches
0100 = 100 inches
C
- 1
D E F
0
G sample: PT420-0025-111-1110
A Measuring Cable Tension
1 = standard (see MECHANICAL specifications)
NOTE: options 2, 3, and 7 below are available for RE-ORDER only!
2 = increased (approx. 4 x standard cable tension, 0.024 inch dia. measuring cable)*
3 = high (approx. 8 x standard cable tension, 0.024 inch dia. measuring cable)*
7 = decreased (same as standard cable tension)
C Measuring Cable Exit
NOTE: options 2, 3, and 4 below are available for RE-ORDER only!
1 = top exit 2 = front exit 3 = rear exit 4 = bottom exit
6 p i n c o n n .
i n s t r .
c a b l e
D
E
F
A
B
C
R E D
B L K
W H T
G R N
Electrical Connections
2 w i r e
1 2 .
.
.
4 0 V D C
4 .
.
.
2 0 m A o u t c a s e g r o u n d
1 2 .
.
.
4 0 V D C
4 .
.
.
2 0 m A o u t n / a c a s e g r o u n d
3 w i r e
1 2 .
.
.
4 0 V D C c o m m o n
0 .
.
.
2 0 m A o u t
1 2 .
.
.
4 0 V D C
0 .
.
.
2 0 m A o u t c o m m o n n / a
E Output
1 = 4-20 mA, 2-wire, output increasing with cable extension
2 = 20-4 mA, 2-wire,output decreasing with cable extension
3 = 0-20 mA, 3-wire, output increasing with cable extension
4 = 20-0 mA, 3-wire, output decreasing with cable extension
F Electrical Connection
1 = 6-pin plastic connector and mating plug
2 = terminal strip
3 = 6-pin metal connector and mating plug
4 = 25 ft. instrumentation cable
* note: mechanical dimensions may vary from outline drawing above
61 tel: (800) 423-5483 • (818) 701-2750 fax: (818) 701-2799
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