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Power supply
24V supply
Use a
twisted pair
wire to minimize the effect of electrical
disturbances on the cable.
The start battery power shall be connected to terminals 1 and 2.
This is the
primary
supply.
The
secondary
(or auxiliary) supply shall be connected to terminal 3
and 4.
Note:
In a classified system, a redundant supply
must
be connected to
terminals 3 and 4.
The control unit uses the highest voltage available from the two
supplies.
The
primary
voltage is constantly monitored and displayed on the
LCD. The control unit alarms if the primary supply is below the
configured value, or when the
secondary
supply is below 12V (fixed
setpoint).
The LCD light disappears if the
primary
voltage drops below 18V,
and reappear when the
primary
voltage rises above 20V.
12V supply installations
The DCU 305 R3 is a 24V system, but can be used in 12V systems
using an external DC/DC converter. The configuration in Rudolf must
be switched to fit a 12V system.
Connect the start battery to the
primary
input at terminal 1 and 2 as
above. This voltage is not high enough to make the control panel
work, but it measures the battery voltage.
Connect a 12/24V DC/DC converter to the 12V start battery, and
connect the 24V output to the
secondary
input, terminal 3 and 4.
Start- and Stop Relay Outputs
Connect auxiliary relays for Start (cranking), Stop, Run solenoid and
Shutdown solenoid.
Observe polarity if the relay coils are fitted with voltage suppressor
diodes.
Coil resistance on auxiliary relays must be in the range 250 ohm - 2
kohm.
Summary of Contents for DCU 305 R3 LT
Page 1: ...Auto Maskin Installation Manual DCU 305 R3 DCU 305 R3 LT Diesel Engine Control Unit...
Page 2: ...About this manual ii...
Page 35: ...Page 35 44 Schematic Drawings Sample Schematic Page 1...
Page 36: ...Page 36 44 Sample Schematic Page 2...
Page 37: ...Page 37 44 Optional Relay Unit MK 14...
