20VS1C

INSTRUCTION MANUALISOLATION AMPLIFIERBEFORE USE ....
Thank you for choosing us. 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 our sales office or representatives.
■ PACKAGE INCLUDES:
Amplifier........................................................................ (1)■ MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■ INSTRUCTION MANUALThis manual describes necessary points of caution whenyou use this product, including installation, connection andbasic maintenance procedures.

20VS1C

MODEL(top adjustment, input isolation)■ INSTALLING THE MODULE
When it is installed on the printed wiring board, land diameter ø1.5 and through-hole ø0.9 are recommended.
■ AND ....
• The unit is designed to function as soon as power is supplied, however, a warm up for 10 minutes is required forsatisfying complete performance described in the datasheet.
• With voltage output, do not leave the output terminals
shortcircuited for a long time. The unit is designed to endure it without breakdown, however, it may shorten appropriate life duration.

TERMINAL CONNECTIONS■ EXTERNAL DIMENSIONS mm (inch)
19.25 (.76)

POINTS OF CAUTION

SPAN■ POWER INPUT RATING & OPERATIONAL RANGE• Locate the power input rating marked on the product andconfirm its operational range as indicated below:
15V DC ±2%, approx. 10mA without load
• When there is spike noises in the power, make a filter with
an appropriate capacitor and inductor to cut it off.

■ WIRING• Do not install cables (power supply, input and output)
close to noise sources (relay drive cable, high frequency
line, etc.).
• Do not bind these cables together with those in which
noises are present. Do not install them in the same duct.
• Mounting multiple isolator modules on single printed
wiring board could cause beat. In such case, use the way
shown as below to make the power supply oscillation frequency of each module to a same one for prevention.

20VS1C

20VS1C

20VS1C22kΩ

5.5 (.22)
0.3 (.01)

17

1718

18

18

0.5 (.02)
20.32 (.80)

13.97 (.55) 7.62 (.30)

1 2 3 4 5 6 7 8 91516171836353433

22212019

14 (.55)

1.27 (.05)

2.54 (.10)■ TERMINAL ASSIGNMENTS+

120 +COM (–)

219 –+15V 715 +EXCITATION*1 COM (0V) 916 –

INPUT

22kΩ

1749 (1.93)

14 (.55)

18 (.71)

0.5 (.02)■ ENVIRONMENT• Indoor use• When heavy dust or metal particles are present in the air,install the unit inside proper housing with sufficient ventilation.
• Do not install the unit where it is subjected to continuousvibration. Do not subject the unit to physical impact.
• Environmental temperature must be within 0 to 60°C (32to 140°F) with relative humidity within 10 to 95% RH inorder to ensure adequate life span and operation.

ZERO–15V

OUTPUT

POWER SUPPLY

8*To be used in the printed wiring board on which the unit is mounted.

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-4430 Rev.1

P. 1 / 2

20VS1C■ PIN ASSIGNMENTNO.

FUNCTION

1

Input (+)

2

Input (-)

3

Input Amplification

4

Phase Compensation

5NC6NC

7

Excitation (+)

8

Excitation (-)

9

Excitation (COM)

15Power (+)

16Power (-)

17

Synchronous Input

18

Synchronous Output

19

Output (-)

20

Output (+)

21

NC

22

NC

33

NC

34

NC

35

NC

36

NC

CHECKING
1) Terminal wiring: Check that wiring is correctly connected according to the connection diagram.
2) Power input voltage: Check voltage across the pins.
3) Input: Check that the input signal is within 0 – 100% ofthe full-scale.
4) Output: Check that the load resistance meets the described specifications.

APPLICATION EXAMPLE
Zero/span adjustments of the module can be made via topadjuster. Opening the terminals 3 and 9, the unit works as0 – 10V input and 0 – 10V output.
The following example shows that output 0 – 10V DC is
made from input 0 – 5V DC. (R = 10kΩ)As 10kΩ is installed in the internal circuit, if R[kΩ] (R ≥1.1kΩ) is connected between pin 3 and pin 9, andinput = VIN, output = VOUT, then VOUT = (1+10/R) × VIN+ 1INPUT 0-5VDC–2+–

3100pF
R10kΩ

49ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the orderedspecifications, therefore you usually do not need any calibration.
For matching the signal to a receiving instrument or in caseof regular calibration, adjust the output as explained in thefollowing.
■ HOW TO CALIBRATE THE OUTPUT SIGNAL
Use a signal source and measuring instruments of sufficientaccuracy level. Turn the power supply on and warm up for
more than 10 minutes.
1) ZERO: Apply 0% input and adjust output to 0%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 0% input.
4) When ZERO value is changed, repeat the above procedure 1) – 3).

MAINTENANCE
Regular calibration procedure is explained below:■ CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,50%, 75% and 100% input signal. Check that the output
signal for the respective input signal remains within accuracy described in the data sheet.

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-4430 Rev.1

P. 2 / 2