Black Box Universal RS-232 to RS-422/485 Bidirecti

Black Box IC820A Specifications

Universal RS-232 to RS-422/485 Bidirecti

At a Glance

Transmit data up to 115 kbps or at distancesup to 4000 ft. Operates in point to point or multipoint applications Operates 2-wire half-duplex or 4-wire half- or full-duplex. async (data leads) only. Up to 32 RS485 devices can be attached to create a large multi-drop network The RS485 driver is automatically enabled during each spacing state on the RS232 side.

Overview

See all products Enables you to select RS-485 2-wire half-duplex or RS-485 4-wire full-duplex operation. Selectable RS-422 operation with transmit and receive always enabled. Automatic RS-485 driver control, so it works without any special programming for handshaking signals. Also enables transmitter from RS-232 TD signal and receiver when not transmitting. Built-in bridging switches for 2- or 4-wire operation with no external jumpers to set. Set operating mode with four switches. Converts using either port power or power from an external 120-VAC/12-VDC power supply (sold separately). No external power is required if two RS-232 output handshake lines are available.