Endress+Hauser SS2100i-2 - Page 35

SS2100i-2 TDLAS Gas Analyzer Operating Instructions
Endress+Hauser 35
Fig 23. Optically isolated RS-232-to-RS-485 converter DIP switches
A. Internal termination not used. 9600 Baud, RS-245 two-wire
B. Cable shield should be grounded.
Item
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
Timeout
1
(ms)
R11
(KΩ)
RS-485 2-Wire
Half Duplex
ON
ON
ON
ON
120 Ω Built-in
Termination
ON
External or no
Termination
OFF
1200 Baud
OFF
OFF
OFF
8.330
2
820
2400 Baud
OFF
OFF
ON
4.160
4800 Baud
OFF
ON
OFF
2.080
9600 Baud
ON
OFF
OFF
1.040
19.2K Baud
ON
ON
ON
0.580
38.4K Baud
OFF
OFF
OFF
0.260
2
27
57.6K Baud
OFF
OFF
OFF
0.176
2
16
115.2K Baud
OFF
OFF
OFF
0.087
2
8.2
Output signal connections (two-wire RS-485 configuration)
WARNING
 Hazardous voltage and risk of electric shock. Turn off and lock out system power before opening the electronics
enclosure and making any connections.
CAUTION
 Certified compound barrier seal type glands and cables shall be used where appropriate in compliance with local
regulations.
 See Fig 7. Components in SS2100i-2 electronics enclosure → for locating fuses. If you need to replace a fuse,
use only the same type and rating of fuse as the original as shown in the following fuse specifications tables. To
re-order parts, refer to Analyzer parts → .
1
Time-out selections are equal to one character time at the indicated baud rate.
2
To achieve this time-out, an appropriate through-hole resistor must be placed in the R11 location on the converter PCB.
A
B
OFF ON