Black Box IC820A RS232 to RS422/485 Interface Converter, DB9 to Terminal Block

Black Box IC820A Async RS232 to RS422/485 Interface Serial Converter

The IC820A Universal Converter provides RS-232 to RS-422/RS-485 conversion using either port-power or an external power supply. Data is converted in both directions, RS-232 transmit data is converted to balanced RS-422 or RS-485 transmit, and received RS-422/RS-485 signals are converted to RS-232. Unlike converters, which require programming hardware handshaking signals to control RS-485 or RS-422 operation, the IC820A provides automatic control. In RS-485 mode, the RS-485 driver is enabled by circuitry, which senses the RS-232 TD input. In half duplex RS-485 mode, the receiver is enabled when not transmitting. For full duplex operation, the receiver is set to always enabled. In RS-422 mode, the transmitter and receiver are always enabled. The operating mode is set with 4 switches. The RS-232 signal lines power the IC820A whether they are set high or low. If not enough power is available from the port, or no handshaking lines are available, a DC jack is provided to connect a 12 VDC supply. The DB9 female connector for RS-232 is wired as DCE (like a modem).

Key Features

• Transmit data up to 115 kbps or at distances up to 4000 ft
• Operates in point to point or multipoint application
• 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
• No external power is required if two RS-232 output handshake lines are available
• 5 Year Double Diamond™ Warranty (Standard) included