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Remember to connect the Tx (transmit) port of device I to the Rx (receive)
port of device II, and the Rx (receive) port of device I to the Tx (transmit)
port of device II. If you make your own cable, we suggest labeling the two
sides of the same line with the same letter (A-to-A and B-to-B, as shown
below, or A1-to-A2 and B1-to-B2).
SC-Port Pinouts
SC-Port to SC-Port Cable Wiring
ST-Port Pinouts
ST-Port to ST-Port Cable Wiring
ATTENTION
This is a Class 1 Laser/LED product. To avoid causing serious
damage to your eyes, do not stare directly into the laser beam.
Redundant Power Inputs
Both power inputs can be connected simultaneously to live DC power
sources. If one power source fails, the other live source acts as a backup,
and automatically supplies the EDS-405A/408A with power.
Relay Contact
The Moxa EtherDevice switch has one relay contact located on the top
panel. For detailed instructions on how to connect the relay contact power
wires to the two middle contacts of the 6-contact terminal block
connector, see the
Wiring the Relay Contact
section. A typical scenario
would be to connect the fault circuit to a warning light located in the
control room. The light can be set up to switch on when a fault is detected.
The relay contact has two terminals that form a fault circuit for connecting
to an alarm system. The two wires attached to the fault contacts form an
open circuit when (1) a relay warning event is triggered, (2) the
EDS-405A/408A is the Master of this Turbo Ring, and the Turbo Ring is
broken, or (3) there is a start-up failure. If none of these three conditions
occur, the fault circuit will be closed.
