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3PXSD4A, 3PXSD4B

B & B ELECTRONICS

3PXSD4A, 3PXSD4B

Card Type

Serial

Chipset

16550A (3PXSD4A)

16750 (3PXSD4B)

I/O Options

Serial ports (4)

Data Bus

8/16 bit ISA

CONNECTIONS

Function

Label

Function

Label

RS-232, RS-422, or RS-485 serial port 1

P1

RS-232, RS-422, or RS-485 serial port 3

P3

RS-232, RS-422, or RS-485 serial port 2

P2

RS-232, RS-422, or RS-485 serial port 4

P4

USER CONFIGURABLE SETTINGS

Setting

Label

Position

»

RS-485 receiver disabled when transmitting on port 1

JP3/B

Pins 1 & 2 closed

 

RS-485 receiver always enabled on port 1

JP3/B

Pins 2 & 3 closed

 

RS-485 transmitter for port 1 enabled on high RTS only

JP3/D

Pins 2 & 3 closed

 

RS-485 transmitter for port 1 enabled whenever transmission is attempted

JP3/D

Pins 1 & 2 closed

 

RS-422/485 termination enabled on port 1

JP3/E

Pins 1 & 2 closed

 

RS-422/485 termination disabled on port 1

JP3/E

Pins 2 & 3 closed

»

RS-485 receiver disabled when transmitting on port 2

JP4/B

Pins 1 & 2 closed

 

RS-485 receiver always enabled on port 2

JP4/B

Pins 2 & 3 closed

 

RS-485 transmitter for port 2 enabled on high RTS only

JP4/D

Pins 2 & 3 closed

 

RS-485 transmitter for port 2 enabled whenever transmission is attempted

JP4/D

Pins 1 & 2 closed

 

RS-422/485 termination enabled on port 2

JP4/E

Pins 1 & 2 closed

 

RS-422/485 termination disabled on port 2

JP4/E

Pins 2 & 3 closed

»

Serial port clock speed normal

JP5

Pins 1 & 2 closed

 

Serial port clock speed multiplied by 4

JP5

Pins 2 & 3 closed

 

Status register enabled

JP6

Pins 1 & 2 closed

 

Status register disabled

JP6

Pins 2 & 3 closed

»

RS-485 receiver disabled when transmitting on port 3

JP7/B

Pins 1 & 2 closed

 

RS-485 receiver always enabled on port 3

JP7/B

Pins 2 & 3 closed

USER CONFIGURABLE SETTINGS (CON’T)

Setting

Label

Position

 

RS-485 transmitter for port 3 enabled on high RTS only

JP7/D

Pins 2 & 3 closed

 

RS-485 transmitter for port 3 enabled whenever transmission is attempted

JP7/D

Pins 1 & 2 closed

 

RS-422/485 termination enabled on port 3

JP7/E

Pins 1 & 2 closed

 

RS-422/485 termination disabled on port 3

JP7/E

Pins 2 & 3 closed

»

RS-485 receiver disabled when transmitting on port 4

JP8/B

Pins 1 & 2 closed

 

RS-485 receiver always enabled on port 4

JP8/B

Pins 2 & 3 closed

 

RS-485 transmitter for port 4 enabled on high RTS only

JP8/D

Pins 2 & 3 closed

 

RS-485 transmitter for port 4 enabled whenever transmission is attempted

JP8/D

Pins 1 & 2 closed

 

RS-422/485 termination enabled on port 4

JP8/E

Pins 1 & 2 closed

 

RS-422/485 termination disabled on port 4

JP8/E

Pins 2 & 3 closed

»

Serial port 1 uses normal interrupt set by JP8

JP11/A

Pins 1 & 2 closed

 

Serial port 1 uses shared interrupt set by JP8

JP11/A

Pins 2 & 3 closed

»

Serial port 2 uses normal interrupt set by JP13

JP11/B

Pins 1 & 2 closed

 

Serial port 2 uses shared interrupt set by JP8

JP11/B

Pins 2 & 3 closed

»

Serial port 3 uses normal interrupt set by JP7

JP11/C

Pins 1 & 2 closed

 

Serial port 3 uses shared interrupt set by JP8

JP11/C

Pins 2 & 3 closed

»

Serial port 4 uses normal interrupt set by JP15

JP11/D

Pins 1 & 2 closed

 

Serial port 4 uses shared interrupt set by JP8

JP11/D

Pins 2 & 3 closed

»

Interrupt sharing disabled

JP16

Pins 1 & 2 closed

 

Interrupt sharing enabled

JP16

Pins 2 & 3 closed

SERIAL PORT 1 CONFIGURATION

Setting

JP1/A

JP1/B

JP1/C

JP1/D

JP3/A

JP3/B

JP3/C

RS-232

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

N/A

N/A

Pins 2 & 3

RS-422

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 2 & 3

Pins 2 & 3

Pins 1 & 2

RS-485

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

See note

Pins 1 & 2

Note:For correct settings of JP3/B for RS-485 mode, see its entry in the User Configurable Settings table.

Pins designated are in the closed position.

SERIAL PORT 2 CONFIGURATION

Setting

JP2/A

JP2/B

JP2/C

JP2/D

JP4/A

JP4/B

JP4/C

RS-232

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

N/A

N/A

Pins 2 & 3

RS-422

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 2 & 3

Pins 2 & 3

Pins 1 & 2

RS-485

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

See note

Pins 1 & 2

Note:For correct settings of JP4/B for RS-485 mode, see its entry in the User Configurable Settings table.

Pins designated are in the closed position.

SERIAL PORT 3 CONFIGURATION

Setting

JP9/A

JP9/B

JP9/C

JP9/D

JP7/A

JP7/B

JP7/C

RS-232

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

N/A

N/A

Pins 2 & 3

RS-422

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 2 & 3

Pins 2 & 3

Pins 1 & 2

RS-485

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

See note

Pins 1 & 2

Note:For correct settings of JP7/B for RS-485 mode, see its entry in the User Configurable Settings table.

Pins designated are in the closed position.

SERIAL PORT 4 CONFIGURATION

Setting

JP10/A

JP10/B

JP10/C

JP10/D

JP8/A

JP8/B

JP8/C

RS-232

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

N/A

N/A

Pins 2 & 3

RS-422

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 2 & 3

Pins 2 & 3

Pins 1 & 2

RS-485

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

See note

Pins 1 & 2

Note:For correct settings of JP8/B for RS-485 mode, see its entry in the User Configurable Settings table.

Pins designated are in the closed position.

SERIAL PORT INTERRUPT SELECTION

Setting

JP12/A

JP12/B

JP12/C

JP12/D

JP12/E

JP12/F

IR/FONT>

Closed

Open

Open

Open

Open

Open

IRQ3

Open

Closed

Open

Open

Open

Open

IRQ4

Open

Open

Closed

Open

Open

Open

IRQ5

Open

Open

Open

Closed

Open

Open

IRQ6

Open

Open

Open

Open

Closed

Open

IRQ7

Open

Open

Open

Open

Open

Closed

IRQ10

Open

Open

Open

Open

Open

Open

IRQ11

Open

Open

Open

Open

Open

Open

IRQ12

Open

Open

Open

Open

Open

Open

IRQ14

Open

Open

Open

Open

Open

Open

IRQ15

Open

Open

Open

Open

Open

Open

SERIAL PORT INTERRUPT SELECTION (CON’T)

Setting

JP12/G

JP12/H

JP12/I

JP12/J

JP12/K

IR/FONT>

Open

Open

Open

Open

Open

IRQ3

Open

Open

Open

Open

Open

IRQ4

Open

Open

Open

Open

Open

IRQ5

Open

Open

Open

Open

Open

IRQ6

Open

Open

Open

Open

Open

IRQ7

Open

Open

Open

Open

Open

IRQ10

Closed

Open

Open

Open

Open

IRQ11

Open

Closed

Open

Open

Open

IRQ12

Open

Open

Closed

Open

Open

IRQ14

Open

Open

Open

Closed

Open

IRQ15

Open

Open

Open

Open

Closed

Note:JP12 sets the interrupt for port 1. The settings for JP13 through JP15 are identical and set the interrupts for ports 2 through 4, respectively.

SERIAL PORT ADDRESS SELECTION

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

000h

On

On

On

On

On

On

On

008h

Off

On

On

On

On

On

On

010h

On

Off

On

On

On

On

On

018h

Off

Off

On

On

On

On

On

020h

On

On

Off

On

On

On

On

2E8h (COM4:)

Off

On

Off

Off

Off

On

Off

2F8h (COM2:)

Off

Off

Off

Off

Off

On

Off

3D8h

Off

Off

On

Off

Off

Off

Off

3E0h

On

On

Off

Off

Off

Off

Off

3E8h (COM3:)

Off

On

Off

Off

Off

Off

Off

3F0h

On

Off

Off

Off

Off

Off

Off

3F8h (COM1:)

Off

Off

Off

Off

Off

Off

Off

Note: A total of 128 base address settings are available. The switches are a binary representation of the decimal memory addresses. SW1/7 is the Most Significant Bit and switch SW1/1 is the Least Significant Bit. The switches have the following decimal values: SW1/7=512, SW1/6=256, SW1/5=128, SW1/4=64, SW1/3=32, SW1/2=16, SW1/1=8. Turn off the switches and add the values of the switches that are off to obtain the correct memory address. (Off=1, On=0)

SW1 sets the address for port 1. The settings for SW2 through SW4 are identical and set the addresses for ports 2 through 4, respectively.