Black Box 1-800-316-7107

Helping you is our priority at Black Box.

We're committed to providing the best customer service in the industry. We're here for you, 24/7, 365.

We'll call you

A technical expert will call you shortly.


Submit Connecting call...

Call Us

Customer Sales & Service Support
1-800-316-7107

Black Box Brand Product Support
877-256-7066

IT Services & Voice Support
855-324-9909

Send us a FAX
800-321-0746

#IC821A

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.


$160.55


16 In Stock
Same Day Shipping (before 5PM ET)
Extended Double Diamond™ Warranty Available (3 Additional Year)


*Required field

Product Features

  • 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.

Details

The BLACK BOX® Universal RS-232↔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 for 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.

NOTE: Power Supply (PS1003) is not included, but is required.

This product works with:
  • CAT3 Solid Bulk Cable
  • DB9 Serial Extension Cable
  • Questions? Contact our FREE Tech Support.

    Tech Specs

    General
    CE Approval Yes
    Connectors RS-232: (1) DB9 F; RS-422/RS-485: (1) removable terminal block
    Data Rate (Maximum) 115.2 kbps
    Isolation 2000 VAC
    Operating Temperature 32 to 158° F (0 to 70° C)
    Power Input: 10-48 VDC; Current Draw: 28 mA at 12 VDC (typical)
    Size 1.7"H x 0.9"W x 3.9"D (4.3 x 2.3 x 9.9 cm)
    This product works with:
    Power Supply (PS1003) is not included, but is required. This product works with: - CAT3 Solid Bulk Cable - DB9 Serial Extension Cable

    * Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.

    Support

    Warranty

    Double Diamond Warranty

    Extended 1 Year Warranty Available


    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $12.40

    Extended 3 Year Warranty Available


    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $24.79

    Diamond

    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 warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The Async RS232 to RS422/485 interface converter DB9 to Terminal Block comes with a standard 1 Year Double Diamond™ Warranty (Standard) already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt 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 724-746-5500.

    * Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.