User's Manual
Documentation Number 3PCIOSD1x-3903m Manual  Chapter 2  5 
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 
B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 
Chapter 2: SETUP 
Inspection 
Your 3PCIOSD1x serial card was tested for proper operation before 
shipment. It should be in perfect mechanical and electrical condition 
upon receipt. 
The card is normally pre-configured for RS-232 operation. 
The data clock speed is set by one jumper to x1 (normal) operation 
or to x4 operation. 
The operating mode of the card is set using 8 jumpers: 4 jumpers 
select RS-232 operation or RS-422/485 operation, one jumper sets 
RTS for RS-232 & RS-485 modes or Send Data for RS-485 mode, 2 
jumpers select RS-422 or RS-485 operating modes for Receive and 
Transmit, and the last jumper selects 120 ohm termination for the 
RS-422 or RS-485 Receive. 
Refer to Jumper Mode Table in Appendix C. 
Before removing the card from the anti-static protective packaging:
•  Discharge any static electricity buildup on your body by touching 
a large grounded metal surface or the metal chassis on 
equipment connected to earth ground by a 3-wire power cord. 
•  Avoid touching the gold connectors or other parts on the card 
except as necessary to set the configuration jumpers. After 
setting the jumpers, ground yourself to the computer chassis 
before and while inserting the card. 
•  Remove AC power from the computer and unplug the power 
cord before inserting the card. 
•  Retain the ESD bag for handling the card. Save the packaging 
for storage or shipping. 
CAUTION: ELECTROSTATIC SENSITIVE DEVICE 
 Use ESD precautions for safe handling. 
6  Chapter 2  Documentation Number 3PCIOSD1x-3903m Manual 
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 
B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 
Figure 1. Silk Screen Plot of 3PCIOSD1x PCB 










