6 - 43
No. 99MBC095A
6. INTERFACE UNIT
3) Output signal
External power supply: Vcc
(5~24 V)
Internal GND External GND
SW1: Circuit 3
Internal circuit
R
• Positive-true logic output by open collector
Voltage: 30V max., Drawing current: 10 mA max.
• External resistance R: (Vcc /10) KΩ ≤ R≤ 10 kΩ
Pin No. Signal name Remarks
Output of 7-digit measurement data (possible to select whether by
positive-true logic or by negative-true logic)
Output of segment error (positive-true logic)
1~28
29
DATA
ERR-0
Output of strobe (acknowledgment) (negative-true logic)
32 STB
Output of sign
• HIGH level: Positive (+) data
• LOW level: Negative (-) data
34 +POLE
4) Input signal
External power supply: Vcc
(5~24 V)
Internal power +5V
Internal GND External GND
F/R, HOLD
SW1: Circuit 3
SW1: Circuit 2
10K
Internal circuit
Pin No. Signal name Remarks
• Does not hold the data when the circuit is open or the line level falls to LOW.
• When the line level rises to HIGH, the previous data will be held (latched)
• and the update does not take place. In order to read the data at a desired
• point in time irrespective of the STB signal, start the read at least 500 µs after
• the input of HOLD signal.
This is valid in simultaneous measurement.
• Selects F (foreground program No.) when the circuit is open or the line level
• falls to LOW.
• Selects R (background program No.) when the line level rises to HIGH.
30
31
HOLD
F/R
