YOKOGAWA FA-M3V e-RT3 Plus, Руководство по оборудованию

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A2-72
IM 34M06C11-01E
Note
Operation of the protection circuitry:
- If short-circuit occurs, the ON voltage increases and the short-circuit current is
limited within the range 1-3A.
- If the short-circuit condition is removed, normal operation resumes.
- If the short-circuit condition persists, the short-circuit current may cause the
temperature of the output element to reach approx. 160°C, triggering the overheat
protector to shut down the output.
- If the temperature of the overheated output element then drops by about 10°C,
normal operation resumes.
- The overheat protector will not be triggered if the module is operated normally within
its specifications with no short-circuit condition.
- Short-circuit protectors are designed to control outputs individually. On the other
hand, the overheat protectors control outputs in pairs: OUT1 and OUT2, OUT3 and
OUT4, …, OUT63 and OUT64..Under some short-circuit conditions, however, the
overheat protector may shut down not only its associated outputs but also other
outputs.
- Short-circuit and overheat protectors are designed to protect the output elements of
the module against short-term short-circuit conditions. Never leave the module in
prolonged short-circuit condition. Otherwise, the module enclosure may deteriorate
or the PCB may be discolored.
- Output loads must be driven by the external power supply only. Never try to use a
power supply other than the external power supply to drive the output loads even if
its output voltage is the same as that of the external power supply. Otherwise, the
output elements may be damaged.