Saab TankRadar L/2
23
US Version. Seventh edition, June 1995
Installation Manual
4.7
Description of the Independent Data Acquisition Unit
Warning:
The DPS board inside the flameproof enclosure of the Indepen-
dent DAU contains powered circuits on easily accessible components.
In addition to the temperature measurement, the Independent
DAU has four analog inputs and eight digital inputs as well as
four relay outputs. The Independent DAU communicates directly
on the TRL/2 Bus.
4.7.1
Power Supply
Power supply voltage to the Independent DAU is selected as
either 115 V or 230 V. The voltage is selected by jumpers in X5, a 4-
pole screw terminal. The jumper is set to 230 V as standard. See
figure 4.5.
Note:
The setting of the voltage is marked on the nameplate. If the switch
is set to 115 V, mark the box on the nameplate: “Mark box If re-wired for
115 VAC”.
1
2
3
4
T
an
k
R
adar L
/2
S
a
a
b T
an
k Control
UL
Ex
©
Data
Acquisition Unit
Type DAU 2130
A division of Saab Marine Electronics
AB
For intrinsically safe circuits only
EEx ia
C T4
BASEEF
A Ex91C2069
LISTED 939U
MADE IN SWEDEN
T
amb
U
=28
W
=1.3
C
=0 L
=0
max:in
max:in
=394
max:in
eq
eq
I
VDC
W
mADC
=-40
°
to +65
°
C
UI:
Serial no:
Ambient temperature -40
°
to +65
°
C
See service manual
may impair intrinsic safety
Wa
rning: any
substitution of components
See control drawing 9150 057-901
provides intrinsicall
y safe outputs.
and
D. T
emperature
Code T4. The
device
Group C
Hazardous Location Class
1
2
3
4
Figure 4.5 shows the voltage setting. Set 2-3 for 230 VAC. Set 1-2 and 3-
4 for 115 VAC.
4.7.2
Relays (Optional)
There are four relays on the Independent DAU. The relays can be
activated by the level measured by the associated RTG or by any
of the parameters measured by the Independent DAU itself.
The optional relays of the Independent DAU can be selected as
either normally open or normally closed. This is done by setting a
two way cable connector in alternative positions in a three pin
header connector. See figure 4.6.
NO - NC
Figure 4.6. Plug
connector in appro-
priate position for
normally open or
normally closed
operation of the
relay.
