ES-4763 Rev.10
VOS-E
Position Sensors
2-WIRE POSITION TRANSMITTER
(flameproof, linear motion type)
Functions & Features
• Differential transformer incorporated
• Light weight and compact design
• High resolution
• Zero & Span adjustable without opening the cover
• Direct or reverse action selectable
Typical Applications
• Detecting stroke positions of a valve actuator or moving positions of other mechanisms and transmits standard 4 to 20 mA DC proportional to the position
MODEL: VOS–E–[1][2][3][4]]5]
ORDERING INFORMATION
• Code number: VOS-E-[1][2][3][4][5]
Specify a code from below for each of [1] through [5].
(e.g. VOS-E-1321/C/R1)
[1] ACTION
1
: Direct
(output increases with counterclockwise lever operation)
2
: Reverse
(output decreases with counterclockwise lever operation)
Note: Counterclockwise if seen from the upper (cover) side.
[2] WIRING CONDUIT
3
: G 1/2 (located at the right side)
4
: G 1/2 (located at the left side)
5
: 1/2 NPT fitting (located at the right side)
6
: 1/2 NPT fitting (located at the left side)
[3] LEVER
1
: Stroke 10 – 30 mm (0.39" – 1.18")
2
: Stroke 30 – 100 mm (1.18" – 3.94")
3
: Stroke 25 – 60 mm (0.98" – 2.36")
[4] LEVER POSITION
1
: Upper side
2
: Lower side
[5] OPTIONS (multiple selections)
Clamp Set
blank
: Without
/C
: With Clamp set
Applicable cable dia.
blank
: 6 < dia. ≤ 8
/R1
: 8 < dia. ≤ 10
/R2
: 10 < dia. ≤ 12
GENERAL SPECIFICATIONS
Degree of protection
: IP55
Action
: Direct or reverse; field selectable by change of the jumper pins' positions
Wiring conduit
: G 1/2 or 1/2 NPT female
Cable gland
: Flameproof packing (direct lead)
Connection
: M3.5 screw terminals (torque 0.8 N·m)
Material
Housing
: Cast aluminium
Position sensor
: PBT (30 % fiber glass)
Painting color
: Silver
Isolation
: Output to metal housing
Zero adjustment
: -5 – +5 % of effective rotating angle
Span adjustment
: 60 – 105 % of effective rotating angle
INPUT SPECIFICATIONS
Input
: Mechanical rotating angle
Effective rotating angle
: -22.5 – +22.5° (45°)
Maximum rotating angle
: -27.5°– + 27.5°(55°)
Torque
: 0.324 N·m (0.239 ft·lbf)
OUTPUT SPECIFICATIONS
Output
: 4 – 20 mA DC
Output impedance
: 1 MΩ min.
Load resistance v.s. supply voltage
:
Load Resistance (Ω) = (Supply Voltage (V) – 12 (V)) ÷ 0.02 (A)
(including leadwire resistance; refer to the graph)
Output characteristics
: Proportional to the sine of rotating angle of the lever
INSTALLATION
Supply voltage
: 15 – 28 V DC
Operating temperature
: -5 to +50°C (23 to 122°F);
-5 to +40°C (23 to 104°F) for use in an explosive atmosphere
Vibration
: ≤ 2 G (19.6 m/s
2
)
Mounting position
: All directions
Weight
: Approx. 2.5 kg (5.51 lb)
PERFORMANCE in percentage of angle ±22.5 degrees
Linearity
: 1.0 % within the linearity assured range
Hysterisis
: 0.3 %
Temp. coefficient
: ±0.03 %/°C (±0.02 %/°F)
Dielectric strength
: 500 V AC @ 1 minute
(output to metal housing)
STANDARDS & APPROVALS
Safety approval
:
TIIS: Flameproof
Ex d IIB T5
DIMENSIONS unit: mm (inch)
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM