Impulse 2104 Bedienungsanleitung PDF herunterladen (Seite 11)

Technical Description

Sealevel Systems SeaLINK+485I Page 8

Technical Description

The SeaLINK+485I: utilizes a USB UART. This chip features programmable

baud rate, data format, 128 byte Dual Port TX Buffer, and 384 byte Dual Port

RX Buffer. The RS-422/485 transceiver supports data rates up to 921.6K baud.

Features

• Hot-Pluggable device

• Does not require opening the case

• No system resources are required (i.e. I/O ports or IRQ’s)

• LED status indicators for “USB Enabled”, “TD”, and “RD”

Connector Pin Assignments (DB25 Male)

The SeaLINK+485I complies with the EIA-530 pin out with the following

signals supported

Signal Name Pin # Mode

GND Ground 7

RDB RX+ Receive Positive 16 Input

RDA RX- Receive Negative 3 Input

TDB TX+ Transmit Positive 14 Output

TDA TX- Transmit Negative 2 Output

Technical Note: The modem control signals are biased as follows : RTS is

connected to CTS, DTR is connected to DCD and DSR, and RI is tied

inactive.

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Impulse 2104 Bedienungsanleitung Seite 11