IDEC DD3S Series, Manual

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21
DD48
Series
Display Units
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
RBI RBO
1st Digit 2nd Digit 3rd Digit 4th Digit
[Ex. 1]
[Ex. 2]
[Ex. 3]
[Ex. 4]
L or
H
L or
H
DP
DP
Function Table
Binary Display Unit
Data Input (H, L: Voltage Level)
LED
Display
Positive Logic Negative Logic
— Latch BL — Latch BL
L L H H H L blank
H L H L H L —
× H H × L L maintain
× × L × × H blank
Input Functions
– Input
Blank or – display is selected.
Latch Input
When the Latch input is set to level H for the positive logic
or level L for the negative logic, the display at the time is
maintained.
BL (Blank) Input
When the BL input is set to level L for the positive logic
or level H for the negative logic, the display is blanked
regardless of other inputs.
Decimal Display Unit
Data Input (H, L: Voltage Level) LED
Positive Logic Negative Logic
Decimal
Display Unit
D C B A LATCH DP RBI RBO D C B A LATCH DP RBI RBO
L L L L L H H * H H H H H L H *
H L H L L H L * L H L H H L L *
H L H H L H L * L H L L H L L *
H H L L L H L * L L H H H L L *
H H L H L H L * L L H L H L L *
H H H L L H L * L L L H H L L *
H H H H L H L * L L L L H L L *
L L L L L L L L H H H H H H L L blank
L L L L L L H * H H H H H H H *
L L L H L L × ∆ H H H L H H × ∆
L L H L L L × ∆ H H L H H H × ∆
L L H H L L × ∆ H H L L H H × ∆
L H L L L L × ∆ H L H H H H × ∆
L H L H L L × ∆ H L H L H H × ∆
L H H L L L × ∆ H L L H H H × ∆
L H H H L L × ∆ H L L L H H × ∆
H L L L L L × ∆ L H H H H H × ∆
H L L H L L × ∆ L H H L H H × ∆
H L H L L L × ∆ L H L H H H × ∆ blank
H L H H L L × ∆ L H L L H H × ∆ blank
H H L L L L × ∆ L L H H H H × ∆ blank
H H L H L L × ∆ L L H L H H × ∆ blank
H H H L L L × ∆ L L L H H H × ∆ blank
H H H H L L × ∆ L L L L H H × ∆ blank
× × × × × L × ∆ × × × × L H × ∆ maintain
Input and Output Functions
A, B, C and D (binary code) Input
Decimal data input corresponding to each
code of 1, 2, 4 or 8
Latch Input
When the Latch input is set to level H for
the positive logic or level L for the negative
logic, the display at the time is maintained.
(DP input is independent.)
DP (Decimal Point) Input
When DP input is set to level H for the
positive logic or level L for the negative
logic, the decimal point turns on.
RBI Input
When the RBI input is set to level L with 0
displayed, the display is blanked.
RBO Output
The RBO output goes to level L during zero
blanking. Leading zeros can be suppressed
by connecting the RBO to the RBI on the
lower digits.
• Display is not affected whether × is in level H or L.
• *
marking indicates high impedance.
• ∆ marking is in level L or high impedance
depending on RBI input.
• RBO output is open collector output.
Application Example of RBI and RBO
[Ex. 1] Leading zeros are also displayed. RBI inputs and RBO outputs are
disconnected.
[Ex. 2] Leading zeros on the upper three digits are suppressed. When the
data on the 1st digit on the lower digit is zero, 0 is displayed.
[Ex. 3] Zero in the 4th digit is suppressed. Zero and decimal point are
displayed on the 3rd digit.
[Ex. 4] Trailing zeros in the 2nd and 1st digits are suppressed.
When the data on the 1st to 4th digits are zero, and the decimal
point on the 4th digit is on, 0.0 is displayed.
Note: Use the RBO output only for connection to the RBI input. Do not use
the RBO for other purposes.