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Digital Meter / Printer

Digital Meter Relay

MODEL 452A

  • ■ Easy recognition of judgement results using 2-color display
  • ■ Equipped with a second LED display for monitoring operating status trend
  • ■ Output of the 4-point Comparison decision for high-low and zone judge

Operation manual

Model Designation

452A - - - - - -

① Measuring input

Code Measuring range Input impedance Accuracy Over load
01 ±19.999 mV 5 MΩ ±(0.05% of rdg + 5digit) DC ±50 V
V1 ±100.00 mV
02 ±199.99 mV 120 kΩ ±(0.05% of rdg + 3digit)
04 ±1.9999 V 1 MΩ ±(0.1% of rdg + 1digit) DC ±250 V
±19.999 V 10 MΩ
±399.9 V ±(0.1% of rdg + 3digit) DC ±750 V
06 ±699.9 V
11 ±19.999 μA 10 kΩ ±(0.05% of rdg + 3digit) DC ±2 mA
12 ±199.99 μA 1 kΩ DC ±20 mA
14 ±1.9999 mA 100 Ω ±(0.1% of rdg + 1digit) DC ±50 mA
±19.999 mA 11 Ω DC ±150 mA
±199.99 mA 1 Ω DC ±500 mA
49 DC 1 to 5 V 1 MΩ DC ±250 V
DC 0 to 5 V
DC 4 to 20 mA 12.4 Ω DC ±150 mA

②Power supply voltage

Code Power source voltage
A AC 100 to 240 V
B DC 12 to 24 V
C DC 110 V

③Power source for sensor
(Floating output)

Code Output voltage Output current
Blank -
2T DC 5 V ± 10% 100 mA
3T DC 12 V ± 5% 150 mA *1
5T DC 24 V ± 5% 100 mA *2
NOTE:
*1 100 mA for the DC power supply
*2 50 mA for the DC power supply

④Data output 1

Code Data output Output impedance Tolerable Load resistive
Blank -
09 Analog output DC 0 to 10 V
(Available scaling,Default:1 to 5 V )
Less than 0.1 Ω More than 500 Ω (DC 1 to 5 V)
More than 1 kΩ (DC 0 to 10 V)
29 Analog output DC0 to 20mA
(Available scaling,Default: 4 to 20 mA)
More than 5 MΩ 0 to 600 Ω (DC 4 to 20 mA)
BP BCD output (TTL level positive logic) -
BN BCD output (TTL level negative logic) -
DP BCD output (transistor output, source type) -
DN BCD output (transistor output, sink type) -
E0 RS-232C -
E1 RS-485 -
EC Decimal point external control -

⑤Data output 2
(Available- 09 and -29 of ④Data output 1 only)

Code Data output
Blank No output
E0 RS-232C
E1 RS-485
EC Decimal point external control

⑥Comparison output

Code specifications
Blank Relay output
TN Open collector output (NPN)

Basic Specifications

Display 0 to 99999, “-” polarity, with zero-suppress function.
Main display: red or green LED (character height 15.2mm)
Sub-display: red LED (character height 7.6mm)
Display data output, current value, peak memory, bottom memory, and display amplitude
“PM” lights up at the peak memory display
“BM” lights up at the bottom memory display.
Both “PM” and “BM” lights up at the amplitude display
Scaling Full-scale: -99999 to +99999
Offset: -99999 to +99999
Display cycle Selectable from 67ms, 400ms, 1s, 2s, 4s, 5s
Resolution 1/100000
Sampling rate Approx. 15 times/s.
Response within 2 samplings or 1 display cycle, whichever longer
Input method Single ended, floating input
A/D conversion ⊿-∑ conversion method
Noise Rejection Normal mode (NMR) - More than 50 dB.
Common mode (CMR) - More than 110 dB.
Noise through power supply line – 1000 V (at AC voltage power supply)
Insulation Resistance DC 500 V, More than 100 MΩ
Withstand Voltage Input terminals - External case: AC 1500 V each for 1min.
Power supply terminals - External case: AC 1500 V each for 1min.
Power supply terminals - Input and output terminals: AC 500 V each for 1min.
I nput terminals - Output terminals: AC 500 V each for 1min.
Power Supply AC 100 to 240 V (90 to 250 V) 50/60 Hz, DC 12 to 24 V (9 to 32 V)
Power Consumption 452A itself: Approx. 9VA at100V AC, 11.5VA at 200VAC, 400mA at 12V. 200mA at 24VDC.
Power supply unit: Approx. 7VA at100V AC, 9VA at 200VAC, 200mA at 12V. 100mA at 24VDC.
Operating Temperature 0 to 50°C
Storage Temperature -20 to 70°C
Weight Approx. 300 g (60 g of the power supply unit)
Housing protection IP65 for the front panel, IP20 for the rear case, IP00 for terminals

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