16
DCU 410 Engine Panel Installation
400 Series Installation and Configuration
System On/Off [7
–
10]
The DCU has a System On/Off function. System On is the
normal mode of operation.
In System Off mode, the DCU internal circuitry is still
active, but it acts as powered off.
Normal operation
To power the DCU for normal operation, connect a strap
between terminals 7-8 and another strap between
terminals 9-10.
The DCU is now always on.
System Off
To set the DCU in System Off mode, remove the strap
between terminals 7-8.
The 24VDC supply at terminal 7 is secured with a 10mA
automatic fuse.
System On
To activate the DCU, connect terminals 7-8 again. The
DCU is immediately ready for use.
External supply
Alternatively, this function can be activated with an
external 24V supply. In this case, do not connect any
jumpers, and do not use terminals 7 and 10.
To activate the DCU (System On), connect a 24V supply to
terminal 8, and the 0V to terminal 9.
Reserved [11
–
15]
Not implemented in this release.
No connection to these terminals.
Switch Input Channels [16
–
26]
There are eight configurable switch input channels which
can be used to detect the status of switches in the
installation.
