Mitsubishi Electric MR-J4, Instruction Manual

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18. MR-J4-03A6 SERVO AMPLIFIER
18 - 24
Note 1. To prevent an electric shock, always connect the CNP1 noiseless grounding terminal ( marked) of the servo amplifier to the
grounding terminal (PE) of the cabinet.
2. Connect the diode in the correct direction. If it is connected reversely, the servo amplifier will malfunction and will not output
signals, disabling EM2 (Forced stop 2) and other protective circuits.
3. The forced stop switch (normally closed contact) must be installed.
4. Supply 24 V DC ± 10% to interfaces from outside. The total current capacity is up to 300 mA. 300 mA is the value applicable
when all I/O signals are used. The current capacity can be decreased by reducing the number of I/O points. Refer to section
3.9.2 (1) that gives the current value necessary for the interface. The illustration of the 24 V DC power supply is divided
between input signal and output signal for convenience. However, they can be configured by one. For 24 V DC power for I/O
signal, use power other than 24 V DC power of servo amplifier control circuit power supply.
5. When starting operation, always turn on EM2 (Forced stop 2), LSP (Forward rotation stroke end) and LSN (Reverse rotation
stroke end). (Normally closed contact)
6. ALM (Malfunction) turns on in normal alarm-free condition. When this signal (normally closed contact) is switched off (at
occurrence of an alarm), the output of the programmable controller should be stopped by the sequence program.
7. The pins with the same signal name are connected in the servo amplifier.
8. This length applies to the command pulse train input in the differential line driver type. It is 2 m or less in the open-collector
type.
9. Use SW1DNC-MRC2-_. (Refer to section 11.7.)
10. The USB communication function and RS-422 communication function are mutually exclusive. They cannot be used together.
11. This connection is not necessary for RD75D. However, to enhance noise tolerance, it is recommended to connect LG of servo
amplifier and control common depending on the positioning module.
12. When a command cable for connection with the controller side malfunctions due to disconnection or noise, a position
mismatch can occur. To avoid the position mismatch, check Encoder A-phase pulse and Encoder B-phase pulse on the
controller side.
13. Configure a circuit to turn off EM2 when the main circuit power is turned off to prevent an unexpected restart of the servo
amplifier.
14. Plus and minus of the power of source interface are the opposite of those of sink interface.
15. CLER and CLEARCOM of source interface are interchanged to sink interface.