M2UDS2
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-5101 Rev.3 P. 3 / 3
EXTERNAL VIEWS
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FRONT VIEW
■
SIDE VIEW
OFF
ON
1 2 3 4
SW1
Output Function
Setting
Zero Adj.
Span Adj.
Status Indicator LED1
Status Indicator LED2
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DIP SWITCH SETTING
Choose the output function: Proportional or inverted output, or loop test output of 0%, 50% and 100%.
Set the DIP switch to appropriate positions before turning on the power supply. No change in the switch positions is valid
while the power is supplied.
OUTPUT
SW1-1
SW1-2
SW1-3
SW1-4
STAT1 LED
STAT2 LED
Inverted output without the limit (*)
OFF
OFF
OFF
OFF
ON
OFF
Proportional output without the limit
ON
OFF
OFF
OFF
ON
OFF
Inverted output with the limit *
1
OFF
ON
OFF
OFF
ON
OFF
Proportional output with the limit *
1
ON
ON
OFF
OFF
ON
OFF
0%
*2
*2
ON
OFF
OFF
ON
50%
*2
*2
OFF
ON
Blinking
ON
100%
*2
*2
ON
ON
ON
ON
(*) Factory setting
*1. The output is limited within 0 to 100%.
*2. ON/OFF position is irrelevant.
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
13 – 14 with a multimeter.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale.
4) Output: Check that the load resistance meets the de-
scribed specifications.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained in the
following.
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HOW TO CALIBRATE THE OUTPUT SIGNAL
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the power supply on and warm up for
more than 10 minutes.
1) Turn all DIP switches to OFF positions.
2) ZERO: Apply 100% input and adjust output to 0%.
3) SPAN: Apply 0% input and adjust output to 100%.
4) Check ZERO adjustment again with 100% input.
5) When ZERO value is changed, repeat the above proce-
dure 2) – 4).
MAINTENANCE
Regular calibration procedure is explained below:
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CALIBRATION
Warm up the unit for at least 10 minutes. Apply 100%,
75%, 50%, 25% and 0% input signal. Check that the output
signal for the respective input signal shows 0%, 25%, 50%,
75% and 100% within accuracy described in the data sheet.
When the output is out of tolerance, recalibrate the unit ac-
cording to the “ADJUSTMENT PROCEDURE” explained
earlier.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.
