Mitsubishi Electric FX2N-10PG User Manual page 26

Model FX2N-10PG Pulse Output Block
• Install a safety circuit outside the FX
operates even if an abnormality occurs in the external power supply or a failure occurs in
the FX
2N
1) Make sure to construct an emergency stop circuit, protection circuit, interlock circuit for
reverse operations such as normal rotation and reverse rotation and interlock circuit to
prevent damages of a machine for upper limit/lower limit, etc. outside the FX
2) When the CPU in the detects an abnormality such as a watch dog timer error by the self-
diagnosis circuit, all outputs turn off. When an abnormality occurs in the I/O control area
which cannot be detected by the CPU in the FX
Design external circuits and the structure so that the entire system conservatively
operates in such cases.
3) Do not lay signal cable near to high voltage power cable or house them in the same
trunking duct. Effects of noise or surge induction may occur. Keep signal cables a safe
distance of more than 100 mm (4") from these power cables.
4) Where output signal lines are used over an extended distance consideration for voltage
drop and noise interference should be made.
5) Fix cables so that any stress is not directly applied on the terminal block or the cable
connection area.
6) When a failure occurs in a transistor etc. in the FX
OFF.
For output signals which may lead to severe accidents, design external circuits and the
structure so that the entire system conservatively operates.
• Make sure to shut down the power supplies of all phases on the outside before starting
installation or wiring.
If the power supplies are not shut down, you may get electrical shock or the unit may be
damaged.
• Never touch any terminals while the power is supplied.
If you touch a terminal while the power is supplied, you may get electrical shock or the
unit may malfunction.
• Turn off the power at first, then start cleaning or tighten terminals.
If you perform cleaning or tightening while the power is supplied, you may get electrical
shock.
• For pairs of inputs such as forward/reverse contacts which would pose a hazard if turned
ON simultaneously, provide external interlocks, in addition to interlocks in the program
inside the positioning unit, to ensure that they cannot be turned ON simultaneously.
-10PG.
F o r w a r d
l i m i t
R e v e r s e
l i m i t
-10PG so that the entire system conservatively
2N
-10PG, output control may be disabled.
2N
2N
F o r w a r d
R e v e r s e
O u t p u t e l e m e n t
-10PG, outputs may keep ON or
6-2
Wiring 6
-10PG.
2N