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TOSLINE-S20 Active Star Coupler (ASC25) Instruction Manual 6F3B0360
TOSLINE S20 9
4. Outline of Functions
(1) Basic functions
When the Active Star Coupler receives a signal from one channel among ten of them, it
tramsmits this signal (unchanged) from its remaining nine ports.
The drawing given below illustrates the case that data input from Port 1, and the data are
output from ports 2 through 10.
Data entered from Port 1
Data generated to Ports 2 through 10
Figure 4.1
(2) Function of preventive measures to single-wire breaking
The function is effective to CH1 and CH10. Able/Disable of the function is selected by a
switch.
In the case that the function is brought into "Able" mode, the transmission on TX side is
stopped about 400 ms after the detection of wire breaking at RX side.
* On using the function, refer to 8.(1) "Precautions on the Preventive Measures to Single-Wire
Breaking".
(3) Function of status display
Since the conditions of power source and of transmission are confirmed by the turning
ON/OFF of the respective LEDs, the function is useful in case of accident occurrence.
For detail of the display, refer to 6.5 "LED Display".
(4) Function of optical level identification
Manipulation of switch makes the optical module output continuously illuminate. The
function is useful to check the optical level at terminals during the cable laying work.
For detail of the switch setting, refer to "6.4 Function setting switches".
(5) Function of automatic test operation
The function is used in quality control in the production and test processes. During
normal operation, turn the switch to "OFF" position.
For detail of switch setting, refer to "6.4 Function setting switches".