Chapter 4 - Bench Tests; General; Bench Test With Built-In Signal Generator - TC Communications TC2400 User Manual

General

It is highly recommended to conduct these bench tests before actual installation. Bench testing will allow
the user to get familiar with all the functions and features of the TC2400/2401 in a controlled environment.
Knowledge of the TC2400/2401's functions and features will ease installation and troubleshooting efforts
later on.

Bench Test with Built-In Signal Generator

The TC2400 (Master) has a built-in signal generator to simulate a broadcast message from a SCADA host,
while the TC2401 (Slave) has a built-in signal generator to simulate an RTU's response message. The built-
in signal generator is a pulse signal indicated by a blinking LED. The flash rate is intentionally reduced for
easy visual confirmation.
1. Set up the bench test as shown in Figure 15. At the Master unit, turn "On" the "SIG-GEN" by sliding
SW3 downward. The "BRD-1" and "BRD-2" LEDs on the TC2400 (Master) should start blinking.
The "BRD-1" and "BRD-2" LEDs on the TC2401s (Slaves) should also blink, indicating receipt of
the Master's broadcast signal.
2. At any Slave, turn "On" the "SIG-GEN" by sliding SW3 downward. The "RSP-1" and "RSP-2"
LEDs on the Slave should start blinking. Verify that the Master's "RSP-1" and "RSP-2" LEDs are
also blinking, indicating receipt of the Slave's simulated response.
3. Disconnect the fiber cable from "RxA" or "RxB" on the TC2400 to simulate a cable breakage. The
"BRD-1" & "BRD-2" and "RSP-1" & "RSP-2" LEDs on the TC2400 and TC2401 should continue
blinking, indicating communication was not disrupted due to the optic cable breakage. Reconnect
the fiber cable & repeat this step for each link between the Slaves and Master unit.
4. Observe any other flashing LEDs on each unit. Refer to pages 8 & 9 for the LED functions of the
TC2400 and TC2401.

Chapter 4 - Bench Tests

Figure 15. Bench Test Connection Diagram
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TC2400 & TC2401
Ring User's Manual
Rev. 1.7