Kongsberg EM 712 Maintenance Manual page 180

Kongsberg EM 712 Maintenance Manual
External synchronization signal characteristics
Signal
RTS
TRIG OUT
TRIG IN
Note
To avoid ground loops and damage of the electronics caused by external connections, all
connections are optically isolated.
Optically isolated input signals
Note
The input signals must not be negative, that is no RS-232 signals can be used for these
inputs.
Input from external system
A
Processing Unit input
B
circuitry
The input current must be approximately 10 mA. Depending on your input signal
additional resistance must be applied to achieve the required input current.
180
Description
Ready To Send - Output
from EM 712 when it
is ready for the next
trigger pulse
Trigger out -
Output to external
synchronization system,
active while the EM 712
is transmitting
Trigger in - Input to
EM 712 enabling it to
transmit
Type
Open collector output
from isolation unit
Open collector output
from isolation unit
Optical isolated input
Active
High
Low
High
451106/B