Perle Systems 5500152-23 manual UltraPort Serial Adaptors User Guide

9. The Protocol Settings page is now displayed as shown in the next picture

10.In the Protocol Settings page, select the configuration values you want and click on the OK button.

Re-configuration of ports is now complete.

Protocol Type: The valid software switchable protocol types are EIA-232, EIA-422, EIA-485 Full Duplex and EIA-485 Half Duplex. Each port on the UltraPort SI are independent of each other and therefore you may select different protocols per serial port.

Baud Rate Multiplier: The baud rate multiplier allows the user to multiply the configured baud rate by 1, 2, 4, 8,16 or 32, hence achieving greater speeds on the UltraPort SI serial interfaces. This is applicable for each protocol type selected. Baud rates for EIA-232 are up to 921.6 Kbps per serial port. Baud rates for EIA-422/EIA-485 are up to 3.686 Mbps per serial port.

Slew Rate Limiting: The default setting for slew rate limiting is disabled. This will allow higher baud rate speeds on each EIA interface port. Slew rate limiting enabled, minimizes EMI and reduces reflections caused by improperly terminated cables. Operation in slew rate limited mode reduces the amplitudes of high-frequency harmonics.

UltraPort Serial Adaptors User Guide	Chapter 2 Installing drivers and host cards
Installing under Windows 95 and 98	Page 28