5.3 I/O Signal Connections
5-11
(2) Output Signals
Note: The output signals /SO1, /SO2, and /SO3 can be used as the output signal /COIN, /V-CMP, /TGON,
/S-RDY, /CLT, /VLT, /BK, /WARN, or /NEAR by setting the parameter Pn50E, Pn50F, or Pn510.
5.3.4 Interface Circuit
This section shows examples of SERVOPACK I/O signal connection to the host controller.
(1) Sequence Input Circuit Interface
CN1 connector terminals 6 to 13 is explained below.
The sequence input circuit interface connects through a relay or open-collector transistor circuit. Select a low-
current relay otherwise a faulty contact will result.
Note: The 24 VDC external power supply capacity must be 50 mA minimum.
(2) Output Circuit Interface
There are two types of SERVOPACK output circuits:
(a) Line Driver Output Circuit
CN1 connector terminals, 17-18 (phase-A signal), 19-20 (phase-B signal), 21-22 (phase-C signal) are
explained below.
Encoder serial data converted to two-phase (phases A and B) pulse output signals (PAO, /PAO, PBO, /PBO)
and origin pulse signals (PCO, /PCO) are output via line-driver output circuits. Connect the line-driver
output circuit through a line receiver circuit at the host controller.
Signal Name Pin No. Function
Com-
mon
ALM+
ALM-
3
4
Servo alarm signal:
Turns OFF when an error is detected.
/BK+ (/SO1+)
/BK- (/SO1-)
1
2
Brake interlock signal:
Controls the brake. The brake is released when the signal is ON.
/SO2+
/SO2-
23
24
General-purpose output signal:
A function can be allocated by setting the parameter.
/SO3+
/SO3-
25
26
FG
Shell
Connected to the frame ground if the shield wire of the I/O signal cable is
connected to the connector shell.
Photocoupler Circuit Example Open-collector Circuit Example
3.3 kΩ
/DEC, etc.
SERVOPACK
24 VDC
+24VIN
+24VIN
3.3 kΩ
/DEC, etc.
SERVOPACK
24 VDC
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