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4.5 I/O Signal Connections
4.5.4 I/O Circuits
4-38
Sequence Input Circuits
Photocoupler Input Circuits
This section describes CN1 connector terminals 40 to 47. The circuits are connected through
relay or open-collector transistor circuits. If you connect through a relay, use a low-current
relay. If you do not use a low-current relay, a faulty contact may result.
Note: The 24-VDC external power supply capacity must be 50 mA minimum.
The SERVOPACK input circuits use bidirectional photocouplers. Select either a sink circuit or
source circuit according to the specifications required by the machine.
Note: The connection examples in
4.5.3 I/O Signal Wiring Examples
on page 4-31 are for sink circuit connections.
•
Precaution When Host Controller Uses Open-Collector Output with User-Supplied Power Sup-
ply
The SERVOPACK may fail depending on the relationship between the pull-up voltage (Vcc) and
the pull-up resistance (R1). Before you wire the circuits, confirm that the specifications of the
host controller satisfy the values shown in the following table.
Examples for Relay Circuits
Examples for Open-Collector Circuits
Refer to the following section for the interface for the SEN signal input circuit.
6.12.2 Structure of the Position Data of the Absolute Encoder
Important
Pull-Up Voltage (Vcc)
Pull-Up Resistance (R1)
24 V
1.8 k
Ω
to 2.7 k
Ω
12 V max.
820
Ω
to 1.5 k
Ω
5 V max.
180
Ω
to 470
Ω
Circuit Example for Open-Collector Outputs
S
ERVOPACK
VF = 1.5 V to 1.8 V
Vcc
Tr1
VF
R1
i
Ho
s
t controller
150
Ω
4.7 k
Ω
Pull-up
4.7 k
Ω
E.g., /
S
-ON
S
ERVOPACK
24 VDC
+24VIN
S_Analog
24 VDC
4.7 k
Ω
E.g., /
S
-ON
S
ERVOPACK
+24VIN
S_Analog
Information