I/O Circuits - YASKAWA SGD7S-R70A Product Manual

3.2 I/O Signal Connections

3.2.3 I/O Circuits

3.2.3 I/O Circuits
Sequence Input Circuits
This section describes CN1 connector terminals 15-14 (Homing Deceleration Switch Input).
Important
The output circuit for the Homing Deceleration Switch signal from the host controller can be
either line-driver output or open-collector output. These are shown below for each type.
Applicable Line Driver:
N75AL 174 from Texa
In trument or equivalent
Important
3-8
The wiring specifications for CN1 connector terminals 15-14 and 40 to 47 are different.
Wire the terminals according to the information described in this section (Sequence Input Cir-
cuits).
The SERVOPACK may fail if the terminals are wired incorrectly.
Line-Driver Output Circuit
Ho t controller
Ω
150
2.8 V ≤ (High level − Low level) ≤ .7 V
If the above formula i not ati fied, the input to the
ERVOPACK will be un table, and the Home Deceleration
witch Input may be identified a ON even though the
witch ha not been turned ON.
• 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.
Pull-Up Voltage (Vcc)
24 V
12 V max.
5 V max.
Circuit Example for Open-Collector Outputs
Ho t controller
Vcc
R1
i
Pull-up
Tr1
ERVOPACK
Ho t controller
Ω
4.7 k
ON:
1.5 V max.
Pull-Up Resistance (R1)
1.8 kΩ to 2.7 kΩ
820 Ω to 1.5 kΩ
180 Ω to 470 Ω
ERVOPACK
Ω
Ω
150
4.7 k
V F
VF = 1.5 V to 1.8 V
Open-Collector Output Circuits
(12-V Power Supply in SERVOPACK)
ERVOPACK
PL terminal
Ω
150
4.7 k
Approx.
9 mA
Output Current (i)
20 mA max.
+12 V
Ω
0 V