M-system VOS2T-R User manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-4766 Rev.6 P. 1 / 4
INSTRUCTION MANUAL
2-WIRE POSITION TRANSMITTER
(rotary motion type; 90-degree rotation) MODEL VOS2T-R
BEFORE USE ....
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■PACKAGE INCLUDES:
VOS2T-R unit ......................................................................(1)
Cable, approx. 1 meter long (optional) ...............................(1)
Cable connector (optional) ..................................................(1)
Lever assembly
Lever ........................................................................(1)
Connecting pin ........................................................(1)
Nailed nut................................................................(1)
Nut with washer (M5).............................................(1)
Screws for attaching the lever (M5 × 8).............................(1)
Plain washer (M5)...............................................................(1)
Toothed washer (M5, external teeth) .................................(1)
Toothed washer (M5, internal teeth)..................................(1)
Note: Bracket, link and other components necessary to attach
the VOS2T-R to an actuator are to be provided by the
customer.
Link Set (model: VOLK) is available to simplify the con-
nection.
■MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
POINTS OF CAUTION
■CONFORMITY WITH EU DIRECTIVES
• When the unit is mounted onto a grounded metal bracket,
insert a noise filter for the output. COSEL Noise Filter
Model NAC-04-472 or equivalent is recommended.
■GENERAL PRECAUTION
• Cut power supply to the unit before wiring to it.
■ENVIRONMENT
• Inside building. If outside, keep away from direct sun-
light.
• Operating temperature -5 to +60°C (23 to 140°F)
• Operating humidity 30 to 90% RH
■ACTUATOR SIDE LEVER
• When the actuator side lever is provided by the customer,
be sure that diameter of the hole threading the connect-
ing pin is 5 millimeters or wider. Diameter of connecting
pin: 5 0
–0.03 mm
■GASKET
• Be sure to return the gasket when you close the unit cover
after wiring or adjustments.
■TORQUE
• For the screws attached to the cover, tightening torque is
between 1.2 and 1.6 N·m.
COMPONENT IDENTIFICATION
Screw for Lever
External Toothed Washer
Plain Washer
Lever
Internal Toothed Washer
Shaft
Indicator
Zero Adjustment (Z)
Span Adjustment (S)
Output Terminal (+)
Output Terminal (–)
Cable Connector
Cable
Cover
Body
Specifications
Jumpers (JP1, JP2)
REVERSEDIRECT
JP1
JP2
RD
JP1
JP2
RD
■ Upper side ■ Lower side
Figure 1

VOS2T-R
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-4766 Rev.6 P. 2 / 4
INSTALLATION
■LINKING WITH LEVERS
• POSITIONING THE VOS2T-R SECURELY
The output accuracy of the VOS2T-R is largely affected by
its mechanical position relative to the actuator.
The VOS2T-R and the actuator respectively must positioned
so that the distance between the centers of VOS2T-R shaft
and the actuator stem (A – C) be equal to the length of the
actuator lever (B – D) as in Figure 2.
The length of actuator lever for the VOLK can be adjusted.
Refer to the “ADJUSTMENT PROCEDURE” section.
Lever, VOS2T-R Side
Actuator Stem
Lever, Actuator Side
(M-System’s Link Set)
D
B
A
C
Figure 2
• CONNECTING THE VOS2T-R SIDE LEVER
Connect the lever to the VOS2T-R unit with a screw in-
cluded in the package, with a plain washer and a toothed
washer between them as in Figure 1. At this stage, you do
not have to fasten the screw tightly.
• CONNECTING THE VOS2T-R SIDE LEVER
TO THE ACTUATOR SIDE LEVER
(with the actuator side lever provided by the customer)
Attach the connecting pin to the VOS2T-R side lever utiliz-
ing the nailed nut and the nut as in Figure 3. The actuator
side lever should be threaded with the connecting pin but
left loose. The nail could be positioned in either side of the
lever, however it is limited to one side at the extreme end of
the lever hole.
ø5 –0.03
0Lever, Actuator Side
Connecting Pin
Nailed Nut
Lever,
VOS2T-R Side
Nut with Washer
Factory
Assembled.
Figure 3
• CONNECTING THE VOS2T-R SIDE LEVER
TO THE ACTUATOR SIDE LEVER
(with VOLK by M-System)
Connect between the levers utilizing the nailed nut as in
Figure 4. (No need of lever A on VOLK)
Connecting Bolt
Lever, Actuator Side Factory Assembled.
(Can not be
disassembled.)
Lever, VOS2T-R Side
Nut with Washer
Figure 4
■LINKING WITHOUT LEVERS
Refer to Figure 5 below when the VOS2T-R is to be connect-
ed directly to an actuator without utilizing levers. Adjust
the relative positions of the actuator stem and VOS2T-R
shaft so that their center positions are in a straight line, or
otherwise use a coupling which can absorb position slides.
Note that performance of the VOS2T-R mounted in this way
is more easily affected by vibration. We recommend not to
use this method when severe vibration is observed.
VOS2T-R Body
Bracket
Actuator Stem
Actuator Body
Shaft
Coupling
Figure 5

VOS2T-R
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-4766 Rev.6 P. 3 / 4
ELECTRICAL CONNECTIONS
Remove the VOS2T-R unit cover and wire to the terminals
according to Figure 6.
15 – 28V DC
LOAD
–
+
OUTPUT
4 – 20mA DC
Figure 6
ADJUSTMENT PROCEDURE
First adjust the relative positions of levers and linking
mechanism.
After that, open the VOS2T-R unit cover. Set the action
direction* with jumpers (JP1, JP2 in Figure 1) and adjust
Zero (Z) and Span (S) behind it.
*Direct action: the output increases when the shaft turns
clockwise (seen from the lever side).
Reverse action: the output increases when the shaft turns
counterclockwise (seen from the lever side).
■HOW TO ADJUST LEVERS & LINKING MECHANISM
1) Electrical wires to the terminals should be done
before this adjustment. However, do not change each
potentiometer’s setting yet. Leave the jumper settings
for action direction as they were set at the factory (direct)
at this moment.
2) For using levers to link, loosen the VOS2T-R side nut
and washer and set the connecting pin (or bolt) position
relative to other components so that the distance A – B
and C – D is the same. See Figure 2. Tighten the nut and
washer.
3) For using the VOLK in combination with the VOS2T-R
lever, adjust lever length of the VOLK so that the distance
A – C and B – D is also the same. (The square A-B-C-D
must be a parallelogram or a rectangle.) Then tighten
the bolt.
If a customer provided lever is also adjustable of its
length, do the same.
4) With the actuator positioned at 50%, adjust the VOS2T-R
shaft angle with a wrench (7 mm) or by twisting the
indicator with your hand so that the VOS2T-R outputs
approx. 12mA. If you are using levers to link, tighten the
screw for lever now (torque 2.4 – 3.1 N·m). If you are not
using a lever, fix the coupling now.
5) Check the indicator and adjust its angle after loosening
its screw (M2.6) if necessary. Make sure that it is
tightened again after adjustment.
■HOW TO ADJUST ZERO AND SPAN
1) If you need reverse action, change the setting now.
Remove the cover and set the jumpers JP1 and JP2 to
R position according to Figure 1. Factory set zero point
may be slided by changing the action direction. Re-adjust
according to the following.
2) First operate the actuator
slowly for full-stroke (90°or
input angle after adjust-
ment) and check that the
VOS2T-R outputs approxi-
mately 0 – 100% (4 – 20mA
DC) accordingly. Be sure
also that the output signal
increases or decreases with-
out interruption.
3) With 50% input (actuator
position), check that the out-
put is approximately 50%.
See Figure 7.
4) With 0% input, adjust the
output to 0% with Zero ad-
justment. See Figure 8.
5) Set the input to 100%. If
there is a deviation in out-
put signal, compensate half
of the deviation via the Zero
adjustment. See Figure 9.
6) With 100% input, adjust the
other half of the deviation
with Span adjustment in or-
der to get 100% output. See
Figure 10.
7) Input 0%, 50% and 100%
signals and check the output
according to the respective
input value. If the output
value is shifted, repeat the
above procedure (3) – (6).
Note: If you set a wider output span (narrower input span),
the VOS2T-R does not output above or below the full-
scale range.
OUTPUT %
100
500 100
INPUT %
0
Fig. 7
OUTPUT %
100
500 100
INPUT %
0
Fig. 8
deviation
OUTPUT %
100
500 100
INPUT %
0
Fig. 9
1/2 deviation
OUTPUT %
100
500 100
INPUT %
0
Fig. 10
1/2 deviation

VOS2T-R
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-4766 Rev.6 P. 4 / 4
MAINTENANCE
■MECHANICAL PARTS
• Check that screws are fastened tightly and if some of
them are loosened, be sure to re-tighten them.
If you find the connecting pin loose, go through “ADJUST-
MENT PROCEDURE” again.
• Inspect visually that the connecting section of levers is
stable and smooth. Check also that the connecting pin or
lever is not worn. If it is, it must be replaced. Consult M-
System or local representative. If the abrasion advances
fairly quickly, there may be a problem in the link mecha-
nism (e.g. connecting pin position)
• If the VOS2T-R is installed outside the building or where
it is subject to water or metallic dust particles, check that
there is no crack or bruise on the gasket. If you find any,
consult M-System or local representative.
• Consult M-System or local representative also for
inspection of packing (O-ring) in the moving parts.
■ELECTRICAL PARTS
• Check first the mechanical parts as above.
• Change actuator positions and input 0%, 25%, 50%, 75%
and 100% signals. Check the output with respective input
value is within allowance indicated in the specifications.
If not, go through “ADJUSTMENT PROCEDURE” again.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protectors for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.