DCU 205 User’s Manual
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10.
W
IRE CONNECTIONS TABLE
This is a description of all wire connections to the DCU 205 unit. Maximum
output relay contact load is 125V, 2A.
Terminal no.
In/Out
Comments
1, 2
In
24VDC mains, supplied from engine start battery. Also supplies
the shutdown unit in the DCU 205. Positive on terminal 1,
negative (0V) on terminal 2.
3, 4
In
From engine speed sensor. Use shielded cable and shield to
battery negative (0V, terminal 2),
not
to ground. Signal strength
must be 2-12VAC (pk-pk).
5, 6, 7
In
Shutdown inputs. 0V in gives shutdown after 1.5 seconds. Input 5
and 7 are interlocked 15 seconds after detected RUN signal.
8
Out
24VDC output for operating auxiliary start-motor relay. Protected
with a 2 amp. fuse.
9
Out
24VDC output for operating auxiliary stop-solenoid relay.
Protected with a 2 amp. fuse.
10
Out
24VDC output for operating auxiliary run-solenoid or electronic
regulator relay. Voltage remains until a STOP command is given.
Protected with a 2 amp. fuse.
11
Out
24VDC output for operating auxiliary emergency stop relay. Not
activated during normal STOP. Protected with a 2 amp. fuse.
12, 13, 14, 15,
16, 17
In
Alarm inputs. If 0V is removed, alarm is given. Input 12 and 17
are interlocked 15 seconds after detected RUN signal.
18, 19
In
Remote START button.
18, 20
In
Remote STOP button.
21, 22
In
Input for automatic start when in STANDBY mode, e.g. blackout
signal from main switchboard.
21, 23
In
Input for delayed stop, e.g. signal from load-dependent start/stop
equipment.
24, 25, 26
Out
Voltage free change over contact for
Common alarm
. 24-25 is
NC, 25-26 is NO. Relay deactivates in case of
Common alarm
.
27, 28, 29
Out
Voltage free change over contact indicating engine running. 27-28
is NC, 28-29 is NO. Relay activates when engine running.
30, 31, 32
Out
Voltage free change over contact indicating engine disabled. 30-
31 is NC, 31-32 is NO. Relay activates if
Shutdown
is detected.
33, 34
Out
Voltage free contact (NO). If START DISABLED is not given, this
indicates DCU 205 unit in STANDBY.
35, 36
Out
Voltage free contact (NO) for generator circuit disconnect. Closes
at STOP or when stop delay time has elapsed during a delayed
stop.
37, 38
Out
0-20mA output as a function of engine speed. Positive on 37,
negative on 38. Use potmeter at the backpanel to calibrate. Use
any correctly scaled 0-20mA meter.
39, 40
In
24VDC supply for the DCU 205 alarm section. Supply taken from
the alarm centre battery. Positive on terminal 39, negative on
terminal 40.
Table 10-, DCU 205 wiring connections
The terminal blocks are 2.5mm
2
. All connections can be made using
0.5mm
2
cable, except to terminal 1-2 and 39-40 (power supply) where
1.5mm
2
should be used.
