Black Box 232/CL-E Manual page 15

RS-232 ↔ CURRENT LOOP INTERFACE CONVERTER
T+
T-
R+
R-
CL050
(active)
16
Figure 4-7. 2-Wire Half-Duplex Multipoint
(CL050 active).
+
Passive
-
+
Passive
-
+
Passive
-