Aerco ProtoNode Gateway Rev 3 (with external LEDs) Instrukcja Użytkownika Pobierz pdf (Strona 18)

AERCO ProtoNode Gateway

User Manual

Page 18 of 126 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0080_0H

11/06/2014 Ph.: 800-526-0288 GF-129

Figure 3-4: Modbus RS-485 Biasing Jumpers on the ProtoNode RER (Left) and

ProtoNode LER (Right)

3.3.3 End of Line Termination Switch for the Modbus RS-485 port on the

ProtoNode

• On long RS-485 cabling runs, the RS-485 trunk must be properly terminated at each

end.

• If the ProtoNode is placed at one of the ends of the trunk, you place the Blue RS-485

End-of- Line terminating jumper to ON position.

• On short cabling runs the terminating EOL jumper can remain OFF except when an RS-

232 to RS-485 converter is connected to the HOST (AERCO) port. In that case, put the

terminating jumper in the ON position. The default setting for this blue terminating

jumper is OFF.

• Always leave the single Red Jumper in the A position. NEVER move the single

Red jumper.

FIGURE 3-5: Modbus RS-485 End-Of-Line Termination Jumpers on the ProtoNode

RER (Left) and ProtoNode LER (Right)

RS-485 Bias Switch

Leave in A

position

Leave in A

position

Modbus RS-485

EOL Jumper

Modbus RS-485

EOL Jumper

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 125 126

Brak uwag

Aerco ProtoNode Gateway Rev 3 (with external LEDs) Instrukcja Użytkownika Strona 18