3/2022
LUMA 500ER
3
1
Introduction
The LUMA 500ER (
E
xtended
R
ange) is an optical modem for fast, reliable underwater
communication. Each LUMA 500ER 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 Micro 6
connectors such as MCIL6F, MCBH6F, MCOM6F, MCPBOF6F or MCDC6F. 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
serial communication link.
2.2
Operation
When in
active
mode the modem will broadcast all data received over the cable and
send over the cable all data received from the optical receiver.
Thermal fold-back:
The emitter of the modem consists of 12 high-power LEDs
composed of one bank of 6 LEDs and two bank of 3 LEDs each. During normal operation
all 12 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
Modem configuration
The LUMA modems can be configured with the
LumaConf
software, available here:
https://files.hydromea.com/luma/LumaConf_500ER.zip
WARNING:
bright LED light source, do not look directly at emitter
a few people may experience epileptic seizures when
viewing flashing lights
