SEALEVEL SYSTEMS, INC.
ULTRA-485
|
Card Type |
Serial card |
|
Chip Set |
Unidentified |
|
Maximum Onboard Memory |
Unidentified |
|
I/O Options |
Serial port |
|
Hard Drives supported |
None |
|
Floppy drives supported |
None |
|
Data Bus |
8-bit ISA |
|
Card Size |
Full-length, full-height |
|
CONNECTIONS | |
|
Function |
Label |
|
Serial Port |
P3 |
|
BASE I/O ADDRESS SELECTION PORT 1 | |||||
|
Setting |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 | |
|
Disabled |
On |
On |
On |
On | |
|
238h |
Off |
On |
On |
Off | |
|
280h |
Off |
Off |
On |
On | |
|
288h |
Off |
Off |
On |
Off | |
|
290h |
Off |
Off |
Off |
On | |
|
298h |
Off |
Off |
Off |
Off | |
|
2E8h |
On |
Off |
On |
On | |
|
2F8h |
On |
On |
Off |
On | |
|
300h |
Off |
On |
Off |
On | |
|
308h |
Off |
On |
Off |
Off | |
|
3E8h |
On |
On |
Off |
Off | |
|
3F8h |
On |
On |
On |
Off | |
|
3220h |
On |
Off |
On |
Off | |
|
3228h |
On |
Off |
Off |
On | |
|
4220h |
On |
Off |
Off |
Off | |
|
4228h |
Off |
On |
On |
On | |
|
SERIAL PORT 1 INTERRUPT SELECTION | ||||||||||
|
IRQ |
E1/A |
E1/B |
E1/C |
E1/D |
E1/E |
E1/F |
E1/G |
E1/H |
E1/I | |
|
2 |
Closed |
Open |
Open |
Open |
Open |
Open |
Open |
Open |
Open | |
|
3 |
Open |
Closed |
Open |
Open |
Open |
Open |
Open |
Open |
Open | |
|
4 |
Open |
Open |
Closed |
Open |
Open |
Open |
Open |
Open |
Open | |
|
5 |
Open |
Open |
Open |
Closed |
Open |
Open |
Open |
Open |
Open | |
|
7 |
Open |
Open |
Open |
Open |
Closed |
Open |
Open |
Open |
Open | |
|
10 |
Open |
Open |
Open |
Open |
Open |
Closed |
Open |
Open |
Open | |
|
11 |
Open |
Open |
Open |
Open |
Open |
Open |
Closed |
Open |
Open | |
|
12 |
Open |
Open |
Open |
Open |
Open |
Open |
Open |
Closed |
Open | |
|
15 |
Open |
Open |
Open |
Open |
Open |
Open |
Open |
Open |
Closed | |
|
SERIAL INTERRUPT MODE SELECTION | ||
|
IRQ |
E2 | |
|
Normal |
Pins 1 & 2 closed | |
|
Shared Interrupt mode |
Pins 2 & 3 closed | |
|
None (1K ohm pull-down resistor) |
Pins 3 & 4 closed | |
|
Note: When using two adapters and having them share an IRQ, one must be set in the shared mode and one must be set to include the 1K ohm pull-down resistor. | ||
|
SERIAL PORT RECEIVE MODE SELECTION | |||
|
Function |
Label |
Position | |
|
RS-485 driver automatically enabled/disabled for receiver circuit |
E3 |
Pins 1 & 2 closed | |
|
Request to send receiver circuit enabled (RS-485) |
E3 |
Pins 3 & 4 closed | |
|
RS-422 enabled for receiver circuit |
E3 |
Pins 5 & 6 closed | |
|
SERIAL PORT TRANSMITT MODE SELECTION | |||
|
Function |
Label |
Position | |
|
RS-485 driver automatically enabled/disabled for transmitter circuit |
E5 |
Pins 1 & 2 closed | |
|
Request to send transmitter enabled (RS-485) |
E5 |
Pins 3 & 4 closed | |
|
RS-422 enabled for transmitter circuit |
E5 |
Pins 5 & 6 closed | |
|
CONNECTOR PIN ASSIGNMENTS | |
|
MODE |
E4 |
|
EIA-530 |
Pins 1-10 closed |
|
SIO-485 |
Pins 11-20 closed |
|
LINE TERMINATION | ||
|
Mode |
Label |
Position |
|
120 ohm termination enabled |
SW2/1 |
On |
|
120 ohm termination disabled |
SW2/1 |
Off |
|
1K ohm pull-down resistor enabled |
SW2/2 |
On |
|
1K ohm pull-down resistor disabled |
SW2/2 |
Off |
|
1K ohm pull-up resistor enabled |
SW2/3 |
On |
|
1K ohm pull-up resistor disabled |
SW2/3 |
Off |
|
Connect TX+ to RX+ for 2 wire operation (RS-485) |
SW2/4 |
On |
|
Connect TX- to RX- for 2 wire operation (RS-485) |
SW2/5 |
On |