·Some details are not shown. Please refer to specification sheets for all information.

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/s2)
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

M-System Co., Ltd.