Black Box IC108A Guia do Utilizador descarregar pdf (Página 21)

Advant

Smart Device (HART

) Interface User’s Guide

Section 2.2.1 Connecting to an Advant Controller 410 Subsystem

3BUR 001 085R0001 REV A 2-9

The last SHIM in the RS-485 bus must have a 100-ohm 1/8W resistor inserted across

XTB1-8 and XTB1-9 to terminate the RS-485 bus.

The SHIM-4/8 is also configured to be 9600 baud, 8N1 which is its default setting. The SW2 1-

8 settings are OFF, OFF, ON, OFF, ON, ON, OFF, OFF.

The SHIM PROM version was 3.03.

Always refer to the documentation that comes with the equipment for more information.

Figure 2-5. Black Box IC108A to SHIM RS-485 Wiring Diagram

Figure 2-6. Westermo Teleindustri AB MA-42 to SHIM RS-485 Wiring Diagram

IC108A - TB1

TxA

TxB

RxA

RxB

SHIM - XTB1 SHIM - XTB1

100-ohm

Termination resistor

Internal

Termination

DATA+

DATA-

1200 meters maximum

1 meter minimum

MA-42 Line Connection