Black Box 232/CL-E Manual page 14

RS-232 ↔ CURRENT LOOP INTERFACE CONVERTER
Passive
+
-
Figure 4-5. 2-Wire Point-to-Point (half-duplex).
T+
T-
R+
R-
CL050
(Passive)
Figure 4-6. 2-Wire Half-Duplex Multipoint
Jumper
(CL050 passive).
T+
T-
half-duplex
R+
R-
+
-
+
-
+
-
CL050
(set to
active)
Passive
Active
Passive
15