Fema Smart DCM, Руководство по эксплуатации, Страница: 9 / 24

SMART SN TRANSMITTER – OPERATING INSTRUCTIONS
MU2B-0328GE51 R0207A 9
OUTPUT DESCRIPTION
PTS...V3 PTH... PTS...A3 PTS...A2
1
2
4
3
1
2
3
4
P
U/I
L+/
~
L-/ ~
WARN
WARN
U/I
OUT
L+/
~
L-/ ~
1
2
4
3
1
2
3
4
P
U
WARN
WARN
U
OUT
L+/
~
L-/ ~
L+/
~
L-/ ~
1
2
4
3
1
2
3
4
P
I
WARN
WARN
I
OUT
L+/
~
L+/
~
L-/ ~
L-/ ~
1
2
4
3
L+
L-
n.c.
n.c.
1
2
3
4
P
I
L+
n.c.
n.c.
L-
Fig. 16. Pin assignment of A-coded M12 plug
NOTE: The unit and any field devices (actuators, sensors,
etc.) to which it is electrically connected must be
provided with a common ground via pin 3.
The initial conditions of the device's signal outputs are as
follows:
Table 3. SN Transmitter signal outputs after power-up
device
output
signal range
WARN power
output
(pin 4)
2-Wire 4…20 mA not used < 3.6 mA not used
4…20 mA passive -- 0 mA
2…10 V passive -- 2 V
0…20 mA passive -- 0 mA
3-Wire
0…10 V passive -- 0 V
The output limits of the device's outputs at overpressure and
underpressure are as follows:
Table 4. SN Transmitter output limits at over- /
underpressure
device
output signal
range
min. output
limit
max. output
limit
2-Wire 4…20 mA 3.8 mA 20.5 mA
4…20 mA 3.8 mA 20.5 mA
2…10 V 1.8 V 10.5 V
0…20 mA 0 mA 20.5 mA
3-Wire
0…10 V 0 V 10.5 V
Table 5. SN Transmitter parameters
parameter description range
analog
start-pt.
pressure mapped to
upper limit of output
range
min. pressure (analog
end minus 50%FS)
analog end-
pt.
pressure mapped to
lower limit of output
range
max. pressure (analog
start plus 50%FS)
offset
user-adjustable offset to
compensate for local
atmospheric pressure
and drift
±25%FS
definition selection of output signal
0…20 mA, 4…20 mA
0…10 V, 2…10 V
function
selecting normal /
inverted output
characteristics
non-inverted; inverted
attenuation
weight (in %) of previous
value in attenuation filter
0.95