ID-DCU-MARINE-2.2.1
, ©ComAp – January 2015
- 136 -
ID-DCU-MARINE-2.2.1r2.pdf
ID-RPU functions
ID-RPU (InteliDrive Redundant Protection Unit) is designed for marine applications. This no microprocessor
unit provides redundant engine protection, RPM measuring and back-up power supply switching for the
control system.
ID-RPU monitors InteliDrive central unit and in the case of fail switches itself to the backup mode or
Emergency backup mode and protects the engine using its own binary EMERGENCY STOP and SHUT
DOWN inputs and FUEL and STOP SOLENOID outputs.
The ID-RPU unit has three operational modes:
Normal
ID-DCU MARINE is working and periodically sends the watchdog impulses to the ID-RPU. All ID-RPU
inputs and outputs are processed via ID-DCU MARINE.
Backup
ID-
RPU unit doesn’t receive watchdog impulses from the ID-DCU MARINE. The Shut down (Sd1 to
Sd5), Emergency stop inputs (fix 0,5 sec delay) and Over speed protection are processed via RPU only.
ID-RPU stays in the mode that was before ID-DCU MARINE fail.
Emergency backup
ID-DCU MARINE was in EME mode (or Sd override function was active) before fail. The only Emergency
stop and Over speed protection is active in this mode. Shut down Sd1 to Sd5 inputs are inactive. ID-RPU
starts to Emergency backup mode after power on without active ID-DCU MARINE.
BI EMERGENCY STOP
BI SHUT DOWN
or
0,5 sec
30 sec
BO FUEL SOLENOID
BO STOP SOLENOID
RPM = 0
Power supply terminals A+, A-, B+, B-, COM+, COM-
The ID-RPU module has two independent power input terminals and one power output terminals. The power
output is supplied from battery A and if this voltage drops under 8V, the relay switches to the power supply
B.
Battery B is switched to A when: Batt A > 10VDC and Fault reset button is pressed on ID-DCU MARINE or
Batt reset button is pressed on ID-RPU when ID-DCU MARINE is out of order. The voltage switching levels
is fix set in the ID-RPU.
Hint:
Short supply drop out occurs during battery A to B or B to A switching. Connect B terminals in parallel to A
when redundant battery B is not used.
Binary inpu
ts SD1 … SD5 – shutdown channels
Include broken wire detection. The input logic is Normally Opened. Inputs are active only if ID-DCU MARINE
unit is in
AUX
mode (and Sd
override is not closed)
. No LED indication.
Hint:
There is no I/O state or Broken wire LED indication on ID-RPU module. All indications are visible on ID-DCU
MARINE screen include Alarm list and History record.
Binary input Emergency stop
No Broken wire detection. The input logic is Normally Closed. Input is active in both ID-DCU MARINE EME
and
AUX
modes. No LED indication.
