Self Test - Black Box 232/CL-E Manual

6.2 Self Test

Follow these instructions to test the
internal circuitry of the CL050:
(1) Unplug the CL050 from AC outlet.
(2) Set switch SWA to full-duplex,
transmit active, receive passive.
(3) Set switch SWC to DCE
configuration.
(4) Attach a DTE device using a
straight-pinned cable from the DTE to
the CL050.
(5) On the CL050, connect a wire from
T- to R-.
DTE
Figure 6-1. Wiring for the Internal Circuitry Test.
RS-232 ↔ CURRENT LOOP INTERFACE CONVERTER
RS-232C Cable
(6) On the CL050, connect a wire from
T+ to R+.
(7) Plug the CL050 into an AC outlet.
(8) Set the DTE device to full-duplex.
(9) Enter data.
(10) The TX and RX LEDs should
flash and the data should display on
the DTE's monitor. If this occurs, all
internal circuitry is operational.
CL050
DCE
Configuration
+
T
-
+
R
-
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