t Industrial Grade – Up to 50 Turns

　　t 4...20 mA Output Signal

　　t Intrinsically Safe

　　Specification Summary:

　　The RT9420 provides rotational position 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