Chapter 3: Installation and Configuration

3.4.4 Echo

The RS-485 “Echo” is the result of connecting the receiver inputs to the transmitter outputs. Each time a character is transmitted, it is also received. This can be beneficial if the software can handle echoing (that is, using received characters to throttle the transmitter), but it can also confuse the system if the software cannot support echoing.

Echo configuration is software selectable for half-duplex RS-485. By default, ECHO is disabled, and this configuration can be set by placing a check next to “Enable Echo” in the “RS-485 Advanced Configuration” field, as shown in Figure 3-4.

Figure 3-4. Enable Echo.

3.4.5 Status LEDs

Status LEDs on the front of the converter indicate the following information:

MODE (Red or Green) – Indicates the electrical interface selected

-Green indicates RS-232 mode

-Red indicates RS-422 or RS-485 mode

DATA (Green) – Blinks to indicate data is being transmitted or received

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Black Box RS-232, 422, 485, Black Box Interface Converter, 4-Port manual Echo, Status LEDs

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

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