Chapter 3: Installation and Configuration

Table 3-1. Pull-up and pull-down

resistor settings.

Mode

PU Setting

PD Setting

 

 

 

RS-232

Always off

Always off

 

 

 

RS-422

Always off

Always off

 

 

 

RS-485

Always on

Always on

 

 

 

3.4.3 Line Termination

A120-ohm resistor is across each RS-422/485 input. If multiple devices are configured in an RS-485 network, only the devices on each end should have the termination in place.

Termination configuration is software selectable for both full- and half-duplex RS-485. By default, line termination is disabled, and this configuration can be set by placing a check next to “Enable Termination” in the “RS-485 Advanced Configuration” field, as shown in Figure 3-3.

Figure 3-3. Enable Termination.

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Black Box Black Box Interface Converter, 4-Port, RS-232, 422, 485 manual Line Termination, Enable Termination

485, 422, Black Box Interface Converter, 4-Port, RS-232 specifications

Black Box RS-232 is a versatile device designed for serial communication using the well-established RS-232 standard. The RS-232 standard has been a cornerstone for serial communication since its introduction in the 1960s and is widely used in various applications today.

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