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Appendix A Quatech SDS User’s Manual
Transmitter outputs
RS-232:
High Level Output: +5 V (min), +5.4 V (typical)
Low Level Output: –5 V (min), –5.4 V (typical)
Transmitter Skew: 50 ns (typical), 200 ns (max)
RS-422/485:
Transmitter Outputs: 2 V (min) for 100 Ohm load
Transmitter Skew: 5 ns (typical), 10 ns (max)
Distance: 4000 feet
Receiver inputs:
RS-232:
Input Voltage Rating: –15 V to +15 V
Receiver Skew: 120 ns (typical), 250 ns (max)
RS-422/485:
Input Voltage Rating: –15 V to +15 V Common Mode Input Voltage
Receiver Skew: 13 ns (typical)
Surge suppression option Surge suppressor is applied to each line; capable of sustaining up to
40-A peak, 8 x 20-µs transient surges, a clamping voltage of 30 V (RS-
232) or 15.5 V (RS-422/485), and a peak energy dissipation of 0.1
Joules.
Note: Units with the "SS" option are limited to 115.2 kbps due to
capacitive loading.
Protocols and software Quatech provides several ways to manage and configure SDS after
installation:
a. Windows Device Manager (Quatech Device Manager on
Windows NT4)
b. On-board utility accessible from a standard HTTP web
browser.
c. Simple Network Management Protocol (SNMP)
d. IntelliSock TCP socket services
Management UDP, TCP/IP, HTTP, DHCP, ARP, SNMP
IP configuration DHCP, Static IP (set through SDS Installation Wizard) or custom
UDP datagram utility
Communication modes Normal, Tunneling, Raw TCP, Auto TCP, Raw UDP
Client OS support Device drivers provided for Windows 2000, Windows XP, Windows
NT4, and Linux
Other operating systems supported by IntelliSock TCP socket
services
Check Website for latest OS support information
Page 86 940-0183-153 July 2005