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1 x DB-9 RS-232 , 1 x Terminal Block - External
MSRP$202.98
$193.18
Save 5%Special order — expected back in stock the week of Sep 7–13.
Genuine Black Box through authorized distribution — TAA country-of-origin verified and NDAA §889 screened before checkout.
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.
Limited Warranty: 1 Year
For over forty years, Black Box has been a world-leading provider of premier IT infrastructure solutions. Today, we continue to design and manufacture award-winning products for Pro AV, KVM, cabling and networking known for their advanced functionality, flawless performance, outstanding reliability and fail-safe security. Our solutions are used every day in government, education, commercial enterprises and any other organization that requires the utmost quality and performance from their IT infrastructure. On top of creating industry-leading products, Black Box demonstrates every day a complete commitment to providing our customers with the best technical support and service in the industry. Our award-winning, dedicated support staff works around the clock to ensure our customers’ systems are always up and running optimally. They are truly as important to the successful IT, communications and business operations of our customers as the powerful products and solutions we deliver.
| General Information | |
|---|---|
| Manufacturer | Black Box Corporation |
| Manufacturer Part Number | IC821A |
| Brand Name | Black Box |
| Product Model | IC821A |
| Product Name | Universal RS-232 to RS-422/485 Converter |
| Product Condition | New |
| Product Type | Transceiver/Media Converter |
| Interfaces/Ports | |
| Total Number of Ports | 2 |
| Physical Characteristics | |
| Form Factor | External |
| Height | 1.7" |
| Width | 0.9" |
| Depth | 3.9" |
| Power Description | |
| Power Source | Power Supply |
| Plug/Connector Type | Terminal Block |
| Warranty | |
| Limited Warranty | 1 Year |
| Miscellaneous | |
| Environmentally Friendly | Yes |
| Country of Origin | United States |
| TAA Compliant | Yes |
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