Status or PWR
4/8/16/32-port models have a PWR LED on the reverse side from the serial connectors.
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If lit, the Status or PWR LED indicates the DeviceMaster RTS has power and completed
the boot cycle.
The Status LED flashes while booting and it takes approximately 15 seconds for the Bootloader to
complete the cycle. When the Bootloader completes the cycle, the LED has a solid, steady light that
blinks approximately every 10 seconds.
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Link/Act | LNK ACT (UP/DOWN) |
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If the Link/Act or LNK ACT LED is lit, it indicates a working Ethernet connection.
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Duplex
Available on 1-port models and 16/32-port models with internal power supply.
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If the Duplex LED is lit, it indicates full-duplex activity.
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COL
Available on the 4/8/16-port models with external power supplies.
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If the COL LED is lit, there is a network collision.
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100
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If the 100 LED is lit, it indicates a working 100 MB Ethernet connection (100 MB network, only).
If the LED is not lit, it indicates a 10 MB Ethernet connection.
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RX/TX
4/8/16/32-Port Models
1/2-Port Models do not have RX/TX LEDs.
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The RX (yellow) and TX (green) LEDs function accordingly when the cable is attached properly to a serial device.
After power cycling the DeviceMaster RTS, RX/TX LEDs are off. The LEDs do not function as described until the port has been opened by an application. -
You can use
Test Terminal or
minicom to open a port or ports if you want to test a port or ports. If the port is configured for RS-232/422 mode:
If the port is configured for RS-485 mode:
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