sdc40b Yamatake Corporation, sdc40b Datasheet - Page 3

• Manufacturer Part Number: sdc40b
• Description: Digital Indicating Controller
• Manufacturer: Yamatake Corporation

Digital input
(DI 1 to DI 12)
Input processing
block
Computation
processing block
No. of inputs
Types of connectable
outputs
Terminal voltage (open)
Terminal current
(short-circuited)
Allowable contact
resistance
(no-voltage contact)
Residual voltage
(open collector on)
Leakage current when
an open collector is off
Parallel connection
to other instruments
Input sampling cycle
ON detection min.
hold time
As shown below, the controller can accept and process five analog inputs: approximation by 1 linearization table,
Linearization
Temperature
compensation
(T. COMP)
Pressure
compensation
(P. COMP)
Square-root extraction
(SQRT)
Digital filtering
(DIG. FILT)
About 80 computational expressions can be assigned to a total of 50 computational units.
Each computational expression has the following format and can operate on up to 4 inputs. Refer to the list of computational
expressions for details.
2 temperature compensation, 3 pressure compensation, 4 square-root extraction and 5 digital filtering.
Raw inpu data
Processed inputs
Linearization
Temp. comp.
Press. comp.
Sq.-root
extraction
Digital
filtering
OUT= f (H1, H2, P1, P2)
(OUT=P1×H1+P2×H2)
Example 1: Addition
H1
OUT
ADD
P.COMP
T.COMP
AIR 1
SQRT
TBL
DIG.
FILT
AI 1
H2
AIR 2
P.COMP
T.COMP
AI 2
SQRT
TBL
DIG.
FILT
12 points
No-voltage contacts (relay contacts) and open collector (current sink to ground)
12V
6mA
On: 700Ω or less (under operating conditions)
Off: 10Ω or more (under operating conditions)
3V or less (under operating conditions)
0.1mA or less (under operating conditions)
Can be connected to Yamatake SDC40B series instruments
0.1 to 0.5 sec. (depends on computation cycle)
0.2 to 1.0 sec. (double computation cycle)
Three sets of 16 approximation by linearization tables are provided.
They can be assigned to analog inputs 1, 2 and 3.
Compensation flow rate signal =
Compensation flow rate signal =
Dropout value: 0.0 to 100.0% variable
First order lag computation: Output =
P2
P1
°C or °F can be selected as units.
MPa, kPa, Pa, kgf/cm
+0.5V
–1.5V
+0.6mA
–1.0mA
P.COMP
T.COMP
AIR 3
SQRT
AI 3
TBL
DIG.
FILT
(OUT asserted after P1 completes)
(under operating conditions) across common terminal (terminal 25 )and each input terminal.
(under operating conditions) across each terminal
Example 2: ON delay timer
H1
ONDT
OUT
3
2
or mmH
Raw input
data
Temp. signals
Press. signals
Flow rate
signals
P1
AIR 3
AIR 1
AIR 2
2
O can be selected as units.
design (target) temperature + constant
design (target) pressure + constant
0
Linearization
current temperature + constant
current pressure + constant
Input
processing
Input
processing
1 + T × S
Example 3: Integration pulse output II
(Integration performed on input H1 and pulse
output as per integral range specified by H2 and P1.)
TBL 1
TBL 2
TBL 3
H1
1
CPX
OUT
H2
Temp. comp.
× input
1
0
T.COMP
AI 1
AI 2
P1
P2
Press. comp.
T: Filter constant 0.0 to 120.0 sec
S: Laplacian
0
1
P.COMP
(no filtering at 0.0)
× flow rate signal
terminal: % data
terminal: Time data
terminal: Flag data
terminal: Index data
× flow rate signal
Sq.-root
extraction
1
0
SQRT
Filtering Processed
DIG.
FILT
inputs
AI 3