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 has power and completed
the boot cycle.
| Note |
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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, 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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