Async RS232 to RS422/485 Interface Converter - DB9 to Terminal Block
Convert async RS232 to RS422/485 at speeds up to 115.2 kbps with distances up to 4000 ft. over CATx cables.
- 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.
The BLACK BOX® Universal RS-232 to RS-422/485 Converter with Opto-Isolation isolates and converts RS-232 signals into RS-422/RS-485 signals and vice versa. Unlike other converters, external software is not required to control data flow. The RS-232 input is wired for DCE through a DB9 female connector, and RS-422/RS-485 signals are interfaced through a removable terminal block. To supply external power to the terminal block, you need our 120-VAC/12-VDC Wallmount Power Supply (PS1003).
For RS-232, the connection requires RD, TD, and Signal Ground.
In RS-422 mode, the driver is always enabled for full-duplex communications. A twisted pair is required for transmit, and a twisted pair is also required to receive. A ground reference wire is also needed. Switch settings are Switch 1: RS-422; Switch 2: Echo On; Switches 3 and 4: 4 Wire.
In both RS-485 modes, the RS-485 driver is automatically enabled during each space state by the presence of an RS-232 signal. When the RS-232 data is in a mark or idle state, the RS-485 driver is disabled and the RS-485 data lines are held in a mark state by the bias provided by a 4.7-ohm resistor; the value of this resistor may need to be changed, depending on the termination you use.
To connect to several RS-485 devices with minimal wire, select the unit's 2-wire, half-duplex RS-485 mode. When data is requested, the addressed device transmits and then reverts back to receive status. Switch settings for this mode are Switch 1: RS-485; Switch 2: Echo Off; Switches 3 and 4: 2 Wire.
For 4-wire master/slave circuits, select the unit's 4-wire, full-duplex RS-485 mode. In this mode, addressed devices can receive data while transmitting data from a previous request. When used as a master in a single-master system, Switch 1 may be selected because the unit is the only transmitter in the system. When used as an RS-485 slave, the RS-232 device must provide addressability. Biasing in a master/slave system is provided by the end-of-line slave. Switch settings for this mode are Switch 1: RS-485; Switch 2: Echo On; Switches 3 and 4: 4 Wire.
Power Supply (PS1003) is not included, but is required.
Product works with:
* Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 1300 73 55 66.
Double Diamond™ Warranty (Standard)
Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.
The Double Diamond Warranty is our no-questions-asked warranty that protects your Black Box® brand products* from faulty workmanship and defects.
During the warranty period, Black Box Network Services will repair or replace your faulty equipment at NO CHARGE!
Plus, get an Extended Double Diamond Warranty.
You can also extend your warranty or protect a previously purchased Black Box® brand product* for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!
Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 1300-734-455.
** Certain products may not be eligible.