Kongsberg EM 2040C, Maintenance Manual

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378511/A
•
Trig in:
The EM 2040C can be triggered by an external signal that will cause the echo
sounder to ping. The
CBMF
board is equipped with an optocoupler at this input. The
input series resistor is tuned for a TTL signal (Low level<0.6 V, High level>3.2 V).
There is a delay from the external trig signal is received to the start of the transmit
pulse (Trig out). This is caused by signal processing in the TX transducer (pitch
stabilization, focus range etc).
The delay is minimum 1.5 ms and depends on the number of transmit pulses per ping
(to optimize pitch stabilization). This means that the delay depends on ping mode
(frequency), sector mode and swath mode (single/dual).
External Synchronisation cable
This connection is used for interface to an external synchronisation system (for example
K-Sync) used when multiple echo sounders are employed on the same vessel. The
external synchronisation connector is located on the CBMF board of the processing unit.
This is an optically isolated connection that requires ~10mA current. Input power and
resistor value must be adjusted accordingly.
The connector is RJ45 type.
This cable must be provided by the installation shipyard.
(CD0806_701_001)
Pin 8
Pin 1
1
Trig out +
DGND
Trig out -
3
2
4
5
7
6
8
Trig in +
Trig in -
DGND
RTT +
RTT -
Pin 3 and 6 is used by Kongsberg Maritime only.
Minimum cable requirements
•
Conductors
: 1
•
Screen
:
•
Voltage
:
•
Maximum outer diameter
:
EM 2040C