All product specifications are subject to change without notice.

Advantech B+B SmartWorx, 707 Dayton Road, PO Box 1040 Ottawa, IL 61350 USA

1 (800)346-3119/Toll Free | orders@advantech-bb.com | support@advantech-bb.com

www.advantech.com

TTL to RS-422 Converter

Model BB-422TTL

Model BB-422TTL converts RS-422 or EIA-530 signals to 5V TTL at data

rates up to 115.2 kbps. Two channels are used to convert RS-422 to TTL and

two channels are used to convert TTL to RS-422.

A DB25 male connector is used on the TTL side and a DB25 female

connector is used on the RS-422/EIA-530 side. The converter supports RD,

TD, RTS, and CTS. Pin 7 is signal ground for both connectors.

The converter supports baud rates up to 115.2 kbps. Open pads are

provided for each line. If desired, you can change the pin connectors for

any of the 4 channels. When converting a second RS-422 channel, use the

corresponding RTS A and RTS B pins (refer to the Quick Start Guide).

The converter inverts the TTL signal. Refer to the specifications table to

determine polarity. An external +12 VDC power supply is required (not

included, sold separately).

• Convert 2 channels in each direction from TTL (“Transistor

Transistor Logic)” to RS-422

• 5V TTL

• Baud rates up to 115.2 kbps

• Quick, inline installation

• Open pads to change pin configuration

• Power supply required (sold separately)

PRODUCT FEATURES

ACCESSORIES – sold separately

SMI6-12-V-P230-C1 - Power Supply, 12 VDC 6 Watt, 2.5MM Plug, International AC Input,

International AC Blades

ORDERING INFORMATION

MODEL NUMBER

RS-422

CONNECTOR TTL CONNECTOR TTL VDC

POWER SUPPLY

REQUIRED

BB-422TTL

DB25 Female

DB25 Male

5V

✔

MECHANICAL DIAGRAM

Units - cm/in

BB-422TTL_2120ds

PINOUTS