Moxa C32010T/PCIEL — опции подключения и проводка кабелей RS-422 и RS-232 [35/43]

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C320Turbo/PCIEL Connection Option and Cable Wiring

5-6

RS-422 Impedance Matching

When an electrical signal travels through two different resistance junctions in a transmission line, the mismatch

will sometimes cause signal reflection. Signal reflection causes signal distortion, which in turn will contribute

communication errors. The solution to this problem is to establish the same impedance at the line ends as in the

line itself by terminating them with resistors.

It is normally sufficient when the value of the termination resistor equals the characteristic impedance of the

transmission line. The resistors should be added near the receiving side. See below.

NOTE

Stands for termination resistor near the receiving side.

The suggested termination resistor for AWG #26 cable is 100 ohm.

The suggested termination resistor for phone cable is 600 ohm.

RS-232 Cable Wiring for C32080T/81T/82T/

83T & CN20040

For Basic/Extensive Modules, only RS-232 interface with RJ45 female connector is supported. A 1.5-meter

male RJ45 to male DB25 RS-232 testing cable, CN20040, is provided with shipment of the Basic Module.

The following RS-232 Basic Modules are designed for Intellio C320Turbo/PCIEL.

C320

80T: Basic Module providing 8 female RS-232 ports.

C320

81T: Basic Module providing 16 female RS-232 ports.

The following RS-232 Extensive Modules are designed for Intellio C320Turbo/PCIEL.

C32

082T: Extensive Module providing 8 female RS-232 ports.

C320

83T: Extensive Module providing 16 female RS-232 ports.

C32080T

/81T/82T/83T 10-pin RJ45

Pin RS-232

1 DCD

2 DSR

3 RTS

4 GND

5 TxD

6 RxD

7 GND

8 CTS

9 DTR