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TC1540D User's Manual
Rev. 1.2
DIP Switch Functions
Figure 3. TC1540's DIP Switch Functions
LED Functions
Figure 4. TC1540's LED Indicator Functions
SW1 -
Left: Normal Operation
Right: Electrical Local Loopback (for diagnostics)
SW6, SW7, SW8 -
Set the RS-485 transition timer (see Table 1)
SW4 -
Only used for advanced diagnose, see related section
for detail. It should be kept at left position for normal
operation.
SW5 -
Not used
SW2 -
Internally loopback optic signal
SW3 -
Generate 1Hz blink TD signal to verify optic connectivity
DIP Switch Functions
Transmit Data Indicator:
(actual logic status on Terminal Block pins depend on electrical interface)
Logic “1” or “Mark” (this is idle state)
Input
O f f :
RS422 - Voltage on “+” terminal > “-” terminal’s voltage.
RS232 - Negative input voltage.
Logic “0” or “Space”,
RS422 - Voltage on “+” terminal < “-” terminal’s voltage.
RS232 - Positive input voltage.
O n :
Optic Sync Indicators:
Optic signal lost or below sensitivity level.
Optic signal is valid.
Flashing -
On -
Collision Indicator:
Refer to Chapter 3 - Troubleshooting Section for detail.
Reverse Polarity:
The input RS422/RS485 signal’s polarities are reversed.
On -
Driver Mode:
When in RS-485 mode, the output terminals are
in driver mode
- the output termnal terminals are in receive mode.
On -
Off
RS485/RS422 Mode:
RS-485 mode.
- RS-422 mode.
On -
Off
Receive Data Indicator:
(actual logic status on output terminal block depend on electrical interface),
same logic state as input terminal blocks.
Power Indicator:
Unit's power supply is adequate
Power is not reaching the unit
On -
Off -
