Raymarine E120W Installation Manual page 36

30
Screen
(RF ground/earth)
Alarm return
Alarm out
(open collector)
Connections for external alarm
Battery +
Third party alarms only
The following guidelines are considered good practice when connecting a third party
high output external alarm or inductive load to an E-Series Display. If you are in any
doubt as to how to make such connections, please consult an authorized installer.
Connecting a high-power output
The E-Series alarm signal is an open collector output limited to 100mA at 24 volts. If
you need a higher current or voltage, you should connect the E-Series via an external
relay.
Connecting an inductive load
When connecting the output to a relay or other inductive device, a spike suppression
diode e.g. 1N4001, should be fitted.
E-series display
Unsheathed/
drain wire
Brown
White
Alarm
(100mA max)
Alarm
out
Suppression
diode
Alarm out
Alarm return
E-Series Installation Manual
Red
SeaTalk power
Black
SeaTalk return
Yellow
SeaTalk data
Battery -
Alarm
return
Battery +
Relay
High current load
Battery --