Switch Swa; Switch Swb - Black Box 232/CL-E Manual

4.3

Switch SWA

Switch SWA controls the Current Loop Configuration. The CL050 is shipped with
the SWA in a "Full-Duplex, Passive" configuration.
Note: 0 indicates "OPEN" and 1 indicates "CLOSED."
SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9 SW10
0 1 0
1 0 1
0 1 0
1 0 1
0 1 0
0 1 0
4.4

Switch SWB

Switch SWB controls loop current (20/30/60 mA). The CL050 is shipped with the
SWB in a "20mA receive; 20mA transmit" configuration.
Note: 0 indicates "OPEN" and 1 indicates "CLOSED."
SW1 SW2
0 0
1 1
1 1
0 0
1 0
RS-232 ↔ CURRENT LOOP INTERFACE CONVERTER
1 0 0 1
0 1 1 0
1 0 1 0
0 1 0 1
1 0 0 1
0 1 1 1
SW3 SW4
0 0
1 1
0 0
1 1
1 0
0 1 0
1 0 1
1 0 1
0 1 0
0 1 0
0 1 0
Loop Current
20mA receive; 20mA transmit loops
60mA receive; 60mA transmit loops
60mA receive; 20mA transmit loops
20mA receive; 60mA transmit loops
30mA receive; 30mA transmit loops
Loop Configuration
Full-Duplex, Passive
Full-Duplex, Active
Full-Duplex, Passive
Receive/Active Transmit
Full-Duplex, Active
Receive/Passive Transmit
Half-Duplex, Passive
(2-wire operation)
Half-Duplex, Active
(2-wire operation)
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