12
2-4. Connection of standard RS-485 interface
Connect with A, B and S.G. on the output terminals for RS-485 interface and the 2 wire serial
interface showing as below figure. Refer to [14-4.Connecting method] as to the connection.
With the standard RS-485, either the command mode or the protocol conforming to the Modbus is
selectable.
(Refer to [15.Modbus communication] as to the Modbus communication.)
・ Stripped length of electrical cable tip is 7 mm.
・ The tightening torque of terminal screws on the terminal block is 0.6 N･m.
・ Please use AWG28 ~ AWG16 for connecting cable.
・ The signal ground of standard RS-485 interface and internal common are connected.
・ Please connect the shield with F.G. terminal of RS-485 interface / 2-wires method serial interface
terminal by using the shielded cable when CSD-903 complies with the CE conformity or applied JIS
standard.
A
Differential I/O (＋)
B
Differential I/O (－)
S.G. Signal ground
Screw side of terminals
pplicable Plug : XW4B-06B-H1.made by OMRON.
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