Mitsubishi Electric CC-Link User Manual page 29

5 HANDLING CC-LINK EMBEDDED I/O ADAPTER
(2) Precautions for external wiring
24V DC
Adapter power supply
5 - 2
Note the following when designing the user board side circuit and board patterns.
1) Use a user board of 1.6mm thickness.
2) When the noise immunity must be increased, insert a noise filter (FDK
make: NFR5UI203MB or equivalent) and Y capacitor (22000pF 630V) in the
adapter power supply line.
3) Connect the transmission SLD and FG within the board.
As a pattern, connect SLD and FG as near as possible to the external I/O
terminals.
4) Make the transmission patterns (DA, DB) as short as possible.
Design the patterns so that the capacitance is 20pF or less with the CC-Link
embedded I/O adapter mounted on the board. (Guidelines: Pattern length
5cm or less, pattern width 0.18mm or less)
5) Since the cascade communication signal pins (16-point adapter: A17 to A20
pins and B17 to B20 pins, 32-point adapter: A26 to A29 pins and B26 to B29
pins) are susceptible to noise, keep them as far away as possible from the
other patterns (power supply, I/O signal) that include noise.
6) When the adapters are not cascaded, always connect GND and RDGON
(16-point adapter: A17 pin and A18 pin, 32-point adapter: A26 pin and A27
pin) on the board side.
7) Wire the FG pattern so that it does not cross the I/O patterns on the front
and back sides of the board.
Doing so makes the adapter sensitive to noise.
(Example: AJ65MBTL1N-16DT)
User board 1)
Signal
4)
name
DA
DB
DG
SLD
5)
X0
X1
X2
X3
X4
X5
X6
X7
L
Y8
Y9
YA
YB
YC
YD
YE
L
YF
24V DC
24G DC
7)
22000pF
630V
+24V
24G
2)
FG
3)
AJ65MBTL1N-16DT
Singnal
Pin No.
name
B22 DA
Link
A22 DB
IC
B21 DG
A21 FG
B20 OE-OUT
A20 OE-IN
B19 SD-OUT
A19 SD-IN
B18 RD
A18 RDGON
6)
Empty
B17
A17 GND
Empty
B16
A16 Empty
B15 Empty
Empty
A15
B14 X0 R
R
A14 X1
B13 X2
A13 X3
R
B12 X4
R
A12 X5
B11 X6
A11 X7
B10 Y8
A10 Y9
B09 YA
A09 YB
B08 YC
A08 YD
B07 YE
A07 YF
Constant
B06 24V DC
voltage
circuit
A06 24V DC
B05 24G DC
A05 24G DC
Empty
B04
Empty
A04
Empty
B03
Insulation
Empty
A03
B02 +24V
DC/DC
A02 +24V
B01 24G
A01 24G
MELSEC-A
To G/A
To G/A
To G/A
5 - 2
5