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ULTRA-485

INDUSTRIAL COMPUTER SOURCE

ULTRA-485

Card Type

Serial card

Chip Set

Unidentified

I/O Options

Serial port

Data Bus

8-bit ISA

CONNECTIONS

Function

Label

Serial port via DB-25 connector

P1

USER CONFIGURABLE SETTINGS

Function

Label

Position

Port mode select normal

E2

Pins 1 & 2 closed

 

Port mode select shared

E2

Pins 2 & 3 closed

 

Port mode select shared with pull down resistor

E2

Pins 3 & 4 closed

 

100 ohm termination enabled

SW2/1

On

 

100 ohm termination disabled

SW2/1

Off

 

1K ohm pull up resistor enabled

SW2/2

On

 

1K ohm pull up resistor disabled

SW2/2

Off

 

1K ohm pull down resistor enabled

SW2/3

On

 

1K ohm pull down resistor disabled

SW2/3

Off

 

Connects TX+ to RX+ for RS-485 two wire operation

SW2/4

Unidentified

 

Connects TX- to RX- for RS-485 two wire operation

SW2/5

Unidentified

ADDRESS SELECTION

Setting

SW1/1

SW1/2

SW1/3

SW1/4

Disabled

On

On

On

On

3F8

On

On

On

Off

2F8

On

On

Off

On

3E8

On

On

Off

Off

2E8

On

Off

On

On

3220

On

Off

On

Off

3228

On

Off

Off

On

4220

On

Off

Off

Off

4228

Off

On

On

On

238

Off

On

On

Off

300

Off

On

Off

On

308

Off

On

Off

Off

280

Off

Off

On

On

288

Off

Off

On

Off

290

Off

Off

Off

On

298

Off

Off

Off

Off

SERIAL PORT INTERRUPT SELECTION

IRQ

E1

 

2

Pins 1 & 2 closed

 

3

Pins 3 & 4 closed

4

Pins 5 & 6 closed

 

5

Pins 7 & 8 closed

 

7

Pins 9 & 10 closed

 

10

Pins 11 & 12 closed

 

11

Pins 13 & 14 closed

 

12

Pins 15 & 16 closed

 

15

Pins 17 & 18 closed

RS-485 DRIVER CIRCUIT SELECTION

Setting

E5

Driver enabled/disabled

Pins 1 & 2 closed

Driver enabled by UART RTS signal

Pins 3 & 4 closed

Driver always enabled

Pins 5 & 6 closed

RS-485 RECEIVER CIRCUIT SELECTION

Setting

E3

Receiver enabled/disabled

Pins 1 & 2 closed

Receiver enabled by UART RTS signal

Pins 3 & 4 closed

Receiver always enabled

Pins 5 & 6 closed

EIA-530/SIO-485 SELECTION

Setting

E4

EIA-530

Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 closed

SIO-485

Pins 11 & 12, 13 & 14, 15 & 16, 17 & 18, 19 & 20 closed