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16i/18i/21i analog servo interface
unit connection material
A-77372EN
1.5.3 Details of signals
(1) VCMD, EC (Output)
VCMD and EC are the speed command signals for the servo amplifier.
Refer to 4.3 Details of signals (1).
(2)A,*A,B,*B,Z,*Z (Input)
These signals are received from the pulse coder.
Refer to 4.3 Details of signal (7).
(3)*PRDY (Output)
*PRDY is the ready signal, issued by the Series 16i/18i21i to the servo amplifier.
Refer to 4.3 Details of signal (4).
(4)ALM (Input)
ALM is the alarm signal, issued by the servo amplifier to the Series 16i/18i/21i.
While this signal is off (open or high level), the CNC assumes that the servo system has entered the
alarm state. When this signal is not used, connect ALM and 0V to each other (low level).
Electrical characteristics
Contact capacity : DC30V, 16mV or greater
Open-circuit contact-to-contact leakage : 1mA or less (for 26.4V)
Closed-circuit contact-to-contact voltage drop
: 2Vor less (for8.5mA, including a voltage drop across the cable)
(5) *SRDY (Input)
*SRDY is the ready signal, issued by the servo amplifier to the Series 16i/18i/21i.
While this signal is on (short or low level), the CNC assumes that the servo system has entered the ready
state. Electrical characteristics are as same as ALM.
(6)24VOUT (Output)
24VOUT is 24VDC power for the servo amplifier from the Series 16i/18i/21i.
24V+-10%, Up to 250mA / one JV1n connector (Up to 500mA / 1 unit)
Pay careful attention to the voltage drop caused by the cable resistance for the
specifications of the servo amplifier.
15
CNC
Servo
amplifier
Receiver
circuit
03 00.8.10 Jinnai (4),(5) are modified.