Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 39

2. SIGNALS AND WIRING
Note 1. To prevent an electric shock, always connect the CNP1 noiseless grounding terminal (
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 of these power supplies must be 300 mA or lower.
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) of "MR-J4-_A_(-RJ) Servo Amplifier Instruction Manual" that gives the current value
necessary for the interface. A 24 V DC power supply can be used for both input signal and output signal. 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. (Normally closed contact)
7. The pins with the same signal name are connected in the servo amplifier.
8. TLA will be available when TL (External torque limit selection) is enabled with [Pr. PD04], [Pr. PD06], [Pr. PD08], [Pr. PD10],
[Pr. PD12], [Pr. PD14], [Pr. PD18], [Pr. PD20], [Pr. PD22], [Pr. PD44], and [Pr. PD46]. (Refer to section 3.6.1 (5) of "MR-J4-
_A_(-RJ) Servo Amplifier Instruction Manual".)
9. Use SW1DNC MRC2-_. (Refer to "MR-J4-_A_(-RJ) Servo Amplifier Instruction Manual" section 11.7.)
10. The USB communication function and RS-422 communication function are mutually exclusive. They cannot be used together.
11. Use an external power supply when inputting a negative voltage.
12. Configure a circuit to turn off EM2 when the main circuit power is turned off to prevent an unexpected restart of the servo
amplifier.
13. This diagram shows sink I/O interface.
14. The devices can be changed with [Pr. PD04], [Pr. PD06], [Pr. PD08], [Pr. PD10], [Pr. PD12], [Pr. PD14], [Pr. PD18], [Pr.
PD20], [Pr. PD22], [Pr. PD44], and [Pr. PD46].
15. Recommended device assignments are shown. The device can be changed by [Pr. PD23] to [Pr. PD26], and [Pr. PD28].
16. DI2 and DI3 are assigned to the CN1-10 and CN1-35 pins by default. When connecting a manual pulse generator, change
them with [Pr. PD44] and [Pr. PD46]. Refer to section 9.1 for details of the manual pulse generator.
17. Supply + of 24 DC V to OPC (Power input for open-collector sink interface) when input devices are assigned to the CN1-10 pin
and the CN1-35 pin. They cannot be used with source input interface. For the positioning mode, input devices (DI2 and DI3)
are assigned by default.
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marked) to the grounding terminal of