3
LUMA X
10/2020
1
Introduction
The LUMA X is an optical modem for fast, reliable underwater communication. Each LUMA X is
a full transceiver and thus capable of half-duplex communication (transmission and reception).
2
Operation
2.1
Setup
Attach both modems to their respective host systems using matching female SubConn Ethernet
Circular 8 pin connectors such as DIL8F, DBH8F or DOM8F. Please make sure to match the
pinout provided in
Electrical and Software Characteristics
•
Apply a suitable supply voltage (12 V
–
36 V).
•
When properly aligned and within communication range, the two modems now provide
a
half-duplex
communication link.
2.2
Operation
The modem provides a completely transparent connection and it will broadcast all data
received from the serial or ethernet interface over the optical interface.
Thermal fold-back:
The emitter of the modem consists of 15 high-power LEDs
composed of 5 banks of 3 LEDs. During normal operation all 15 LEDs are transmitting in
parallel to provide the highest possible transmission range. If the circuit board
temperature rises above 60
°
C the modem will dynamically switch off emitter banks until
the temperature returns to a safe level.
3
Maintenance
Please wash the modem with warm water (only) to remove any built-up which could negatively
affect its operation. Apply a thin film of silicone grease to the rubber part of the connector pins
to protect the connector and to facilitate mating. For maintenance details regarding the
connector follow SubConn's instructions.
WARNING:
•
bright LED light source, do not look directly at emitter
•
a few people may experience epileptic seizures when
viewing flashing lights