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The ULTRA 485 contains several jumper straps that must be set for proper
operation.
Address Selection
The ULTRA 485 occupies 8 consecutive I/O locations, and looks to the PC as a
standard serial port. A DIP-switch (SW1) is used to set the port address options
for the ULTRA 485. Be careful when selecting the port addresses as some
selections may conflict with existing ports. The following table shows the
addressing options available with the standard PAL. If different address options
are required, please contact Sealevel Systems Technical Support about a
custom PAL option.
Port1 J2
SW1-1
Disabled
On
3F8
On
2F8
On
3E8
On
2E8
On
3220
On
3228
On
4220
On
4228
Off
238
Off
300
Off
308
Off
280
Off
288
Off
290
Off
298
Off
Note: Each COM port in the system should have a unique address. Typically
COM1: - COM4: addresses are 3F8, 2F8, 3E8 & 2E8 Hex.
Sealevel Systems ULTRA-485
Card Setup
SW1-2
SW1-3
On
On
On
On
On
Off
On
Off
Off
On
Off
On
Off
Off
Off
Off
On
On
On
On
On
Off
On
Off
Off
On
Off
On
Off
Off
Off
Off
Card Setup
SW1-4
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
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