Implementing CC-Link with the
HCPL-772X/ 072X
Power Supplies and Bypassing
possible to the input and output
power supply pins of the HCPL-
772X/072X. For each capacitor,
the total lead length between both
ends of capacitor and the power
supply pins should not exceed 20
mm. The bypass capacitors are
required because of the high
The recommended CC-Link circuit
is shown in Figure 17. Since the
HCPL-772X/072X are fully
compatible with CMOS logic level
signals, the optocoupler is
connected directly to the
transceiver. Two bypass
capacitors (with values between
0.01 µF and 0.1 µF) are required
and should be located as close as
CC-Link (Control and
Communication Link) is
developed to merge control and
information in the low-level
network (field network) by PCs,
thereby making the multivendor
environment a reality. It has data
control and message-exchange
function, as well as bit control
function, and operates at the
speed up to 10 Mbps.
speed digital nature of the signals
inside the optocoupler.
V
V
DD1
(5 V)
DD2
(5 V)
HCPL-7720#500
SN75ALS181NS
FIL
V
V
CC
CC
V
V
V
DD2
DD1
10 K
0.1 µ
DA
DB
DG
A
V
O
R
I
RD1
0.1 µ
0.1 µ
0.1 µ
0.1 µ
B
RE
GND
GND
1
DE
D
Y
Z
GND
GND
1
2
GND
GND
HCPL-7720#500
SLD
V
V
V
DD1
DD2
V
O
I
SD
0.1 µ
GND
GND
FG
HCPL-2611#560
V
V
NC
OE
DD
1 K
+
–
V
O
MPU
BOARD
OUTPUT
HC14
390
GND
HC14
NC
10 K
HCPL-2611#560
V
V
NC
OE
DD
1 K
+
–
V
O
SDGATEON
HC14
390
GND
HC14
10 K
NC
Figure 17. Recommended CC-Link application circuit.
13
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
