ES-4767 Rev.10
VOS2T
Position Sensors
2-WIRE POSITION TRANSMITTER
(linear motion type; 45 degrees)
Functions & Features
• 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
• Light weight and compact design
• High resolution
• Excellent reliability & durability
• Field selectable direct or reverse action
• Rugged enclosure
MODEL: VOS2T–[1][2][3][4]
ORDERING INFORMATION
• Code number: VOS2T-[1][2][3][4]
Specify a code from below for each of [1] through [4].
(e.g. VOS2T-11R0)
[1] 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")
[2] LEVER POSITION
1
: Upper side
2
: Lower side
[3] RETURN SPRING
0
: None
L
: Counterclockwise return (Seen from the lever side)
R
: Clockwise return (Seen from the lever side)
[4] WIRING CONDUIT
0
: G 1/2
1
: 1/2" NPT fitting
2
: G 1/2 with cable connector
4
: Cables connected (approx. 1 meter or 3.3 ft)
RELATED PRODUCTS
•Clamp set (model: VOCP)
GENERAL SPECIFICATIONS
Degree of protection
: IP66
(Screw torque for cover: 1.2 – 1.6 N·m)
Action
: Direct or reverse; field selectable by change of the jumper pins' positions; factory set to direct action
Wiring conduit
: G 1/2
Connection
: M3.5 screw terminals (torque 0.8 N·m)
Materials
Housing
: Cast aluminium
Screw terminals
: Nickel-plated steel
Cable connector
: Nylon 66
(applicable cable's external dia. 6.5 – 8.5 mm)
Lever
: Stainless-steel
Painting color
: Silver
Isolation
: Output to metal housing
Zero adjustment
: -2.2 – +2.2° of input angle
The Zero indicates such input angle where the transmitter outputs 12 mA.
Span adjustment
: 22.5 – 45° of input angle
The Span indicates the absolute difference between such input angle for 4 mA and that for 20 mA.
INPUT SPECIFICATIONS
Input
: Mechanical rotating angle
Effective rotating angle
: Approx. -27 – +27° (54°)
Linearity assured range
: -22.5 – +22.5° (45°)
Stopper strength
: 1.37 N·m (1.011 ft·lbf)
With static load
OUTPUT SPECIFICATIONS
Output
: 4 – 20 mA DC
Operational range
: 3.5 – 23 mA DC
Load resistance v.s. supply voltage
:
Load Resistance (Ω) = (Supply Voltage (V) – 12 (V)) ÷ 0.02 (A) (including leadwire resistance)
(Refer to the graphic on the end of the section)
Output characteristics
: Proportional to the sine of rotating angle of the lever
INSTALLATION
Supply voltage
: 15 – 28 V DC
Operating temperature
: -5 to +60°C (23 to 140°F)
Operating humidity
: 30 to 90 % RH (non-condensing inside)
Environemnt
: Protect from strong magnetic field.
Vibration
: ≤ 2 G (19.6 m/s
2
)
Mounting position
: All directions
Weight
: 550 g (1.21 lb) without lever and cable
PERFORMANCE in percentage of angle ±22.5 degrees
Linearity
: 1.0 % within the linearity assured range
Temp. coefficient
: ±0.06 %/°C (±0.04 %/°F)
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 500 V AC @ 1 minute
(output to metal housing)
STANDARDS & APPROVALS
EU conformity
:
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
EXTERNAL DIMENSIONS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM