B&B Electronics 422LP9N - Datasheet User Manual
Page 2
Document No. 422LP9N0812 - pg. 2/2
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International Office: 707 Dayton Road PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104
European Office: Westlink Commercial Park Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445
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Table 2 - 422LP9N Pin-Outs
Biasing Resistors
The biasing resistors for the RS-422/RS-485 receiver are 4.7K Ohm resistors. These resistors are labeled
R1 and R6 (See Figure 3). Refer to B&B Electronics RS-422/485 Application Note for further information on
biasing.
Figure 3
Specifications
Data Rate:
115.2K Baud max.
Power:
Port-Powered from RTS and DTR.
NOTE: If external power is required, apply power to DTR (4) and SG (5). Source must supply greater than 6VDC
and current limited to 40mA
NOTE: When using an external supply, the supply should be connected only to specifically labeled power inputs
(power jack, terminal block, etc.). Connecting an external power supply to the handshake lines may damage the unit.
Contact technical support for more information on connecting an external power supply to the handshake lines.
Signal
DB-9S Pin #
Transmit Data A (-)
8
Transmit Data B (+)
3
Receive Data A (-)
2
Receive Data B (+)
7
Signal Ground
4, 6
DECLARATION OF CONFORMITY
Manufacturer’s Name:
B&B Electronics Manufacturing Company
Manufacturer’s Address:
P.O. Box 1040
707 Dayton Road
Ottawa, IL 61350 USA
Model Numbers:
422LP9N
Description:
9-Pin Port-Powered RS-422 Converter
Type:
Light industrial ITE equipment
Application of Council Directive: 89/336/EEC
Standards:
EN 50082-1 (IEC 801-2, IEC 801-3, IEC 801-4)
EN 50081-1 (EN 55022, IEC 1000-4-2)
EN 61000 (-4-2, -4-3, -4-4, -4-5, -4-6, -4-8, -4-11)
ENV 50204
EN 55024
Robert M. Paratore, Director of Engineering