RT9420-0003-121-1120
t Industrial Grade – Up to 50 Turns
t 4...20 mA Output Signal
t Intrinsically Safe
Specification Summary:
The RT9420 provides rotational POSTTTION feedback
via 4...20 mA current loop signal. This
device combines the superb linearity and resolution
of a plastic-hybrid potentiometer and the
durability of Celesco’s 4...20mA circuit to provide
an accurate and reliable electrical signal.
Additionally the zero and span settings
are adjustable through access holes in the
housing.
This innovative sensor from Celesco, designed
to meet NEMA-4 and IP67 standards,
is available in full stroke ranges of 1/4 to 50
turns.
Electrical Output Signal:
GENERAL
Full Stroke Range .................................... 0-0.25 to 0-50 turns, see next page
Output Signal ................................ 4 - 20 mA (2-wire), 0 - 20 mA (3-wire), see
Accuracy ...................................................... + 0.30 to +0.15% full stroke, see
Repeatability ................................................................ + 0.05% full stroke, max.
Resolution ............................................................................... essentially infinite
Enclosure Material ............... powder-painted aluminum or stainless steel, see
Sensor .................................................... plastic-hybrid precision potentiometer
Shaft Loading ................................................ up to 35 lbs. radial and 5 lbs. axial
Weight, Aluminum (Stainless Steel) Enclosure ..................... 5 lbs. (10 lbs.) max.
ELECTRICAL
Input Voltage ................................................................................. 12 to 40 VDC
Input Current ....................................................................................... 4 - 20 mA
Loop Resistance (Load) ........................... (loop supply voltage - 12 ) / 0.02, max
Circuit Protection ...................................................................... 38 mA maximum
Impedance ................................................................ 100 MW @ 100 VDC, min.
Zero and Span Adjustment ............................................................. 2:1 turndown
ENVIRONMENTAL
Enclosure Design ..................................... NEMA 4/4X/6, IP 67/68, see and
Hazardous Area Certification (see )
CSA 22.2: ......................................................... Class 1, Groups A, B, C and D
Cenelec: .................................................................................. LCIE EEx IIc T4
Operating Temperature ............................................................... -40o F to 200oF
Thermal Effects
Zero ........................................................................ 0.01% full stroke / oF, max.
Span ........................................................................................ 0.01% / oF, max.
Vibration ............................................................... up to 10 G's to 2000 Hz max.
EMC COMPLIANCE PER DIRECTIVE 89/336/EEC
Emission / Immunity ..................................................... EN50081-2 / EN50082-2
RT9420- 0005 - 1 1 1 - 1 1 1 0
order code: R A B C D E F G
Specifications: Full Stroke Range: 5 turns (5 clockwise shaft rotations)
Enclosure Material: powder-painted aluminum
Shaft Diameter: 0.25 inches
Output Signals: 4-20 mA, 2-wire, output increasing with clockwise shaft rotation
Electrical Connection: 6-pin plastic connector
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