6
.
Serial Communications Settings
9
6.2. Cable Wiring Diagram
Refer to
SECTION 3 Installation and Wiring
of the
CJ Series Serial Communications Units
OPERATION MANUAL
(Cat. No. W336) for details on cable wirings.
Check connector configurations and signal lines (pin assignments) before wiring.
■Connector configurations and signal lines (pin assignments)
CJ1W-SCU42 Serial Communications Unit applicable connector: Terminal block
Pin No.
Symbol Signal name
Input/Output
1(See note 1.)
RDA
Receive data -
Input
2(See Note 1.)
RDB
Receive data +
Input
3(See Note 1.)
SDA
Send data -
Output
4(See Note 1.)
SDB
Send data +
Output
5(See Note 2.)
FG
Shield
-
Note 1: For 2-wire connection, use either pins 1 and 2 or pins 3 and 4.
Note 2: Pin 5 (Shield) is connected to the GR terminal on Power Supply Unit though Serial
Communications Unit. The cable shield can thus be grounded by grounding the GR
terminal of Power Supply Unit.
Inverter (3G3MX2-A[][][][]-V1) applicable connector: Terminal block
■Cable/Pin assignments
Serial Communications Unit
(CJ1W-SCU42).
Inverter (3G3MX2-A[][][][]-V1)
RS-422A/
485
interface
Signal
name
Pin No.
Terminal
block
Signal
name
RS-485
interface
RDA-
1
A1
RS-
RDB+
2
B1
RS+
SDA-
3
SDB+
4
FG
5
Terminal block
Terminal block
Control Circuit Terminal
Terminating
resistor
Содержание CJ2*-CPU Series
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