Impulse 3405 - Manual (Page 5)

Card Setup
Sealevel Systems VERSA COMM+4/EX Page 2
Card Setup
The VERSA COMM+4/EX contains several jumper straps that must be set for
proper operation.
Address Selection
Each port on the VERSA COMM+4/EX occupies eight consecutive I/O
locations. A DIP-switch is used to set the base address for these locations.
The VERSA COMM+4/EX has a unique addressing scheme that allows it to be
completely compatible with Sealevel Systems’ older four port RS-232 interface
adapters (p/n 3064, 3065, 3066 and 3400) and provides the ability to select
specific non-linear address combinations (i.e. 3F8, 2F8, 3E8, 2E8).
The first addressing scheme allows the user 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 custom PAL options.
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.