ES-4764 Rev.14
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/s
2
)
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