User Manual

Card Setup
Sealevel Systems ULTRA-485 Page 2
Card Setup
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 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
Note: Each COM port in the system should have a unique address. Typically
COM1: - COM4: addresses are 3F8, 2F8, 3E8 & 2E8 Hex.