Mitsubishi Electric MELSERVO-JE MR-JE-100A, Instruction Manual

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3. SIGNALS AND WIRING
3 - 7
Note 1. To prevent an electric shock, always connect the protective earth (PE) terminal (marked ) of the servo amplifier to the
protective earth (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.
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 (normally closed contact). When this signal 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-E. (Refer to section 11.4.)
10. This connection is not necessary for LD75D and QD75D. However, to enhance noise immunity, it is recommended to connect
LG of servo amplifier and control common depending on the positioning module.
11. Configure a circuit to turn off EM2 when the power is turned off to prevent an unexpected restart of the servo amplifier.
12. Plus and minus of the power of source interface are the opposite of those of sink interface.
13. CLEAR and CLEARCOM of source interface are interchanged to sink interface.
14. When a command cable malfunctions due to disconnection or noise, a position mismatch can occur. To avoid position
mismatch, it is recommended that Encoder A-phase pulse and Encoder B-phase pulse be checked.