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

VOS-ER

Position Sensors

2-WIRE POSITION TRANSMITTER
(flameproof, rotary 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 rotating angle of a valve actuator or moving positions of other rotating machines and transmits standard 4 to 20 mA DC proportional to the position

MODEL: VOS–ER–[1][2][3][4]]5]

ORDERING INFORMATION
• Code number: VOS-ER-[1][2][3][4][5]
Specify a code from below for each of [1] through [5].
  (e.g. VOS-ER-1321/LC/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: Effective radius 15 – 40 mm (0.59" – 1.57")
2: Effective radius 40 – 130 mm (1.57" – 5.12")
3: Effective radius 35 – 80 mm (1.38" – 3.15")

[4] LEVER POSITION
1: Upper side
2: Lower side

[5] OPTIONS (multiple selections)
Link Set
blank: Without
/LA: Type A
/LB: Type B
/LB1: Type B-1
/LC: Type C
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
Linearity assured range: -45 – +45° (90°)

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 input angle

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/s2)
Mounting position: All directions
Weight: Approx. 2.5 kg (5.51 lb)

PERFORMANCE in percentage of angle ±45 degrees
Linearity: 1.5 % 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

EXTERNAL DIMENSIONS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

M-System Co., Ltd.