M6DXU
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-7853 Rev.3 P. 5 / 5
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Check DIP switch setting.
3) Power input voltage: Check voltage across the terminal
7 – 8 with a multimeter.
4) Input: Check that the input signal is within 0 – 100% of
the full-scale.
If the thermocouple, RTD, potentiometer or its extension
wires are broken, the output goes over 100% (below 0%
with downscale protection) due to the burnout function.
Confirm the status indicator LED pattern and check
leadwires in such a case.
5) Output: Check that the load resistance meets the de-
scribed specifications.
STATUS INDICATOR LED
The transmitter is provided with a status indicator LED
which blinks in different patterns indicating various oper-
ating status.
The following figure indicates typical patterns.
Normal operating mode
TRANSMITTER STATUS
ON
OFF
LED ON-OFF PATTERNS
Burnout mode
Abnormal operating mode
80 milliseconds
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 accu-
racy described in the data sheet. When the output is out of
tolerance, recalibrate the unit using the PC Configurator
Software (model: M6CFG).
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.
