Impulse 3440 - Manual (Page 5)

Card Setup
Sealevel Systems ULTRA COMM+422 Page 2
Card Setup
The ULTRA COMM+422 contains several jumper straps, which must be set for
proper operation.
Address Selection
Each port on the ULTRA COMM+422 occupies eight consecutive I/O
locations. A DIP-switch is used to set the base address for these locations.
The ULTRA COMM+422 has a unique addressing scheme that allows it to be
completely compatible with Sealevel Systems’ older four port RS-422/485
interface adapter (p/n 3067) and provide for the ability to select address
combinations more commonly used.
The first addressing scheme allows the ULTRA COMM+422 to select the
addresses for its ports from a table of available address combinations.
The following table shows the addressing combinations available. If different
address combinations are required, please contact Sealevel Systems Technical
Support about a custom PAL option.
Switch
6
Switch
7
Switch
8
Port
1
Port
2
Port
3
Port
4
On On Off 3F8 2F8 3E8 2E8
On Off On 2F8 3E8 2E8 2E0
On Off Off 3E8 2E8 280 288
Off On On 500 508 510 518
Off On Off 580 588 590 598
Off Off On 1500 1508 1510 1518
Off Off Off 3220 3228 4220 4228
On On On Addresses set up by switches 1-5
Figure 1 - Available Address Combinations
Note: Each COM: port in the system should have a unique address. Typically
COM1: - COM4: addresses are 3F8, 2F8, 3E8 and 2E8 Hex.
Refer to Appendix A for common address contentions.