7.3. Analog Output Function
The A7000 series can output an analog signal with respect to the
indicated value (when the analog output unit has been installed).
There are four types of outputs: 0 to 1 V, 0 to 10 V, 1 to 5 V, and 4 to
20 mA, which can be selected using scaling data. Also, any scaling
can be applied.
7.4. RS-232C Function
The A7000 series allows RS-232C function to be incorporated
(when the RS-232C unit has been installed). For the RS-232C function,
see the separate Communications Function Operation Manual.
7.5. RS-485 Function
The A7000 series allows RS-485 function to be incorporated (when
the RS-485 unit has been installed). For the RS-485 function, see the
separate Communications Function Operation Manual.
8.
Specifications and Outer Dimensions
8.1. Input Specifications
8.2. Common Specifications
Display:
7-segment LED display (character height: approx. 16 mm)
Polarity display:
Automatically indicated when the calculation result is negative
Display range:
-9999 to 9999
Overrange warning:
“OVER” or “-OVER” indication in response to an input signal
exceeding the display range
Decimal point:
Settable to any digit position
Zero indication:
Leading zero suppression
External control: P.SEL1 - 3, HOLD, PH, DZ (depending on output units)
Operating temperature and humidity ranges:
0 to 50 °C, 35 to 85% R.H (no condensation)
Storage temperature and humidity ranges:
-10 to 70 °C, 60% R.H or less
Power:
AC power unit... 100 to 240 V AC ±10%,
DC power unit ... 12 to 48 V DC ±10%
Power consumption: 8 VA max. (AC power unit)
7 W max. (DC power unit)
Outer dimensions: 72 mm (W) x 36 mm (H) x 118 mm (D)
Weight:
Approx. 160 g
Withstand voltage (AC power):
Power terminal to input terminal, COM, comparison output,
BCD,
analog output, or RS communications terminal 1500 V AC
for 1 minute
Withstand voltage (DC power):
Power terminal to input terminal, COM, comparison output,
BCD,
analog output, or RS communications terminal 500 V DC for 1
minute
Withstand voltage (common):
Input terminal to comparison output, BCD, analog output, or
RS- communications terminal 500 V DC for 1 minute
Case to each terminal 1500 V AC for 1 minute
Insulation resistance: 500 V DC at 100 M
Ω
or more between the noted
Terminals
8.3. Output Specifications
8.3.1.
Comparison Output
Control method: Microcomputer-based calculation method
Judgment value setting range:
-9999 to 9999
Hysteresis:
Settable in the range of 1 to 999 digits with respect to each
judgment value
Comparison action: Depending on sampling rate
Setting conditions: High-high limit judgment value > high limit judgment value > low
limit
judgment value > low-low limit judgment value
Comparison conditions:
Comparator relay: Contact rating
125 V AC, 0.3 A (resistive load)
30 V DC, 1 A (resistive load)
Number of contacts
Relay contact x 5
Mechanical life
50 million times or more
Electrical life
100,000 times or more (resistive load)
Photocoupler output:
Output rating
Sink current 50 mA max. Voltage applied: 30 V max.
Output saturation voltage 1.2 V or less at 50 mA
Output quantity
Photocoupler x 5
8.3.2.
BCD Outputs
●
TTL output
Measured data:
Tri-state parallel BCD
Polarity signal:
1 level for negative indication
Excess signal:
1 level for excess indication
Printout command signal (PC):
Positive pulse output after completion of measurement (PC
width depends on sampling)
Output logic:
Switchable (PC logic not switchable)
Output signal:
TTL level fan-out = 2, COMS compatible
●
Open collector output (NPN type)
Measured data:
Transistor ON when negative logic is logic 1
Polarity signal:
Transistor ON for negative indication
Excess signal:
Transistor ON for excess indication
Printout command signal (PC):
Transistor ON after completion of measurement (PC width
depends on sampling)
Output logic:
Switchable (PC logic not switchable)
Transistor output capacity:
Voltage 30 V max., Current 10 mA max.
Output saturation voltage
1.2 V or less at 10 mA
●
Enable
Enable input:
Shorting the ENABLE terminal with the DG terminal or making
these terminals have the same potential causes BCD output to
be high impedance (TTL) or transistor to be turned OFF.
Control signal HI level:
3.5 to 5 V with respect to DG terminal
Control signal LO level:
0 to 1.5 V with respect to DG terminal
Input current: -0.5 mA
Judgment
HH, HI
LO
GO
HI
LO, LL
ResultsIndicated value > high-high limit judgment value > high limit judgment value
Comparison Conditions
High limit judgment value
≧
indicated value
≧
low limit judgment value
Low limit judgment value > low-low limit judgment value > indicated value
High-high limit judgment value
≧
indicated value > high limit judgment value
Low limit judgment value > indicated value
≧
low-low limit judgment value
Instruction Manual for MODEL A7X1A-X(Load Cell Input) 10/12
5V
10V
-1 to+ 1mV/V
1 to 3mV/V
-4 to+ 4mV/V
± (0.1% of FS +
2digit)
Zero
adjusting
range
Error
(23°C ± 5°C,35 to 85%)
measurement
range
Sensor
power
Span
adjusting
range
Sampling rate : Approx. 1000 times second
Minimum input sensitivity :
0.5
μ
V/digit (Sensor power:5V), 1
μ
V/digit (Sensor power:10V)
Sensor power : 5V ±5
％
30mA, 10V ±5
％
30mA
Conformity sensor : 350
Ω
*Error applies if the sampling rate is 20 times/sec ot less.