UM353-1
Function Blocks
March 2003
3-27
3.2.17 AOUT_ - Analog Outputs
AOUT_
function blocks convert function block
interconnection signals, connected to input S, to a
block output having a range of 4-20 mAdc. Input
D can be used to disconnect the output from the
load when asserted high (1). This feature is useful
when two or more controllers are connected to a
common load. When one controller is connected to
the load, others are disconnected using the
disconnect feature. The function block includes
scaling to range the 4-20 mA output with the block
input signal. The range pointer parameter (input R)
tells the block where to obtain scaling information.
If this parameter is not configured the block will
use a range of 0.00 to 100.00.
Two analog output function blocks are available on
the Controller Board and one additional on the
Expander Board. Function block names and terminal identifications are listed below. The output is factory
calibrated for 4-20 mAdc and should not require field calibration. However, field calibration can be performed if
desired. The output is calibrated by adjusting the pulser until the desired output (i.e. 4.0 mA for zero) is obtained
and then pressing the store button. A verify mode is available during calibration that will show the mA value in the
numeric display as the pulser adjusts the output over the full range.
Output QS is the Quality Status output. It will go high if the output driver detects a high impedance or an open
circuit. The alphanumeric will flash AOUT_.OC when an open circuit condition is detected. The QS output could
also be used to switch to a second output circuit in a redundancy application.
BLOCK DIAGRAM
AOUT_+
Scaling
D/A
S
AOUT_c
O
utput
R
an
G
e
P
oin
T
e
R
AOUT_+
AOUT_c
ANALOG OUTPUT _
G
R
T
C
C
Z E R O
F
L L
V
E
I
W
R
an
G
e
P
oin
T
e
R
(S)
.......
loop tag.block tag (null)
INPUT S
(H)
........
loop tag.block tag.output (null)
ZERO
output
(C)
....................... 4.0 mA
FULL
scale output
(C)
.............. 20.0 mA
VIEW
output - verify cal.
(C)
............. mA
ANALOG OUTPUT
U
AOUT_
R
T
C A L
L
A
A L
I N P U
S
I N P U T
D
INPUT D
(H)
........
loop tag.block tag.output (null)
4 - 20 mA dc
P
D
S
D
isconnect
S
ignal
QS
Q
uality
S
tatus
R
R
ange
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Summary of Contents for Moore 353
Page 2: ...S t o c k C h e c k c o m ...
Page 14: ...Contents UM353 1 xii March 2003 S t o c k C h e c k c o m ...
Page 24: ...Introduction UM353 1 March 2003 1 10 S t o c k C h e c k c o m ...
Page 152: ...LonWorks Communications UM353 1 March 2003 5 4 S t o c k C h e c k c o m ...
Page 164: ...Network Communications UM353 1 6 12 March 2003 S t o c k C h e c k c o m ...
Page 246: ...Operation UM353 1 March 2003 9 8 S t o c k C h e c k c o m ...
Page 254: ...Controller and System Test UM353 1 March 2003 10 8 S t o c k C h e c k c o m ...
Page 282: ...Circuit Description UM353 1 March 2003 13 4 S t o c k C h e c k c o m ...
Page 298: ...Model Designation and Specifications UM353 1 March 2003 14 16 S t o c k C h e c k c o m ...
Page 302: ...Abbreviations And Acronyms UM353 1 15 2 March 2003 S t o c k C h e c k c o m ...
Page 304: ...Warranty UM353 1 W 2 March 2003 S t o c k C h e c k c o m ...