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UNO-2059E User Manual 24

Terminator Resistor Setup for RS-422/485

The terminal resistors for impedance matching on the UNO-2059E are

not installed in the factory. Users can install the resistors with the appro-

priate resistances according to the UNO-2059E application. Each termi-

nal resistor responds to different channels for RS-422/485 signal lines.

Usually, these resistors are needed for both ends of the communication

wires and the value of the resistors should match the characteristic imped-

ance of the wires used (approximately 120 W or 300 W).

The TR3, TR4, TR5 and TR6 shown on Figure A-8 are prepared for

COM3 and COM4 termination resistors respectively.

Figure A.8: COM 3&4 Port Terminator Resistors

Table A.5: RS-422 Terminal Resistors (COM3&4)

Serial Port Terminal Resistor

COM3 TR3 (Tx+, Tx-)

COM3 TR5 (Rx+, Rx-)

COM4 TR4 (Tx+, Tx-)

COM4 TR6 (Rx+, Rx-)

Table A.6: RS-485 Terminal Resistors (COM3&4)

Serial Port Terminal Resistor

COM3 TR3 (Data+, Data-)

COM4 TR4 (Data+, Data-)

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AMD CS5535 Bedienungsanleitung Seite 30