The three connector test units provide the ability to monitor any baud rate of Async data in both directions in a simplex mode, not Tx and Rx at the same time, between two devices such as a computer and modem. The data can be monitored with a computer using Procom, HyperTerminal or similar communications software using only one serial port on the monitoring computer. The data flowing between the two devices is OR together and connected to the Rx input of the MONITOR connector. The three connectors are wired in the conventional RS232 manner. The INPUT and OUTPUT connectors are connected pin per pin together.
Instructions:
Insert the three terminal test unit between the two
devices that the data is to be monitored using the INPUT and
OUTPUT connectors on the Three terminal unit with the appropriate
adapters. Plug the MONITOR connector into the serial port of the
monitoring computer. Set up the communications software for the
baud rate, data bits, and stop bit if required, with no flow control,
and the serial port that the Three terminal test unit is plugged into.
The data should be displayed on the monitor computer. Most of
the communications software packages allow the recorder data to
be written or saved to a TEXT file for later analysis.
Pin connections
| Pin number/Connector | MONITOR | INPUT | OUTPUT |
| 1 | Receive | Receive | Receive |
| 2 | NC | Transmit | Transmit |
| 3 | NC | 3 TO 3 | |
| 4 | COMMON | COMMON | COMMON |
| 5 | NC | 5 TO 5 | |
| 6 | NC | 6 TO 6 | |
| 7 | NC | 7 TO 7 | |
| 8 | NC | 8 TO 8 | |
| 9* | NC | 9 TO 9 |
| NC is No Connections | * Pin used only on applicable model |
The Three Terminal RS232 Test
Unit is warranted by the manufacture against defects for 30 days
from date of purchase. The defective unit must be returned prepaid
to the distributor or manufacture with a copy of the sales slip with
in 30 days and will be replaced or repaired at the manufacture
discretion.
There are no active devices in the Test Unit that can harm your
computer, but connections made to the INPUT and OUTPUT
connectors of the Test Unit inappropriately may cause harm to
your computer and are not warranted or guaranteed by the
manufacture or distributor.
| PART # | Description | Price each |
| RS232-100 | Provides RS232 monitoring with convenient Modular jacks | $27.50 |
| RS232-200 | Provides RS232 monitoring with convenient DB9 jacks | $47.50 |
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