TSURUGA MODEL 451A

Digital Panel Meter

• ■ Highly visible large LED Display
• ■ Grouped commonly-used parameters
• ■ Scaling, Average processing function, and Peak & Bottom hold function
• ■ Water- and dust-proof IP65 front panel
• ■ Pulse input 451A
•  
• Model Designation

• 451A	-	□	-	□	-	□	-	□	-	□
  		①		②		③		④		⑤

  ①Measuring 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	5 MΩ
  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	10 MΩ	±(0.1% of rdg + 3digit)	DC ±750 V
  06	±699.9 V	10 MΩ
  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	1 MΩ
  	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

  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

  ④Analog output, RS-485

  Code	Data Output	Output impedance	Tolerable Load resistor
  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 DC 0 to 20 mA (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 ④ Data output 1 only)

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

  Basic Specifications

  Display	0 to 99999, red or green LED (character height 15.2 mm), “-” polarity, with zero-suppress function.
  Scaling offset	-99999 to +99999
  Scaling full scale	-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. Input 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	451A itself: Approx. 7 VA at 100 V AC, 9 VA at 200 V AC, 300 mA at 12 V. 150 mA at 24 V DC. Power supply unit: Approx. 7VA at 100V AC, 9VA at 200V AC, 200mA at 12V. 100mA at 24V DC.
  Operating Temperature	0 to 50°C
  Storage Temperature	-20 to 70°C
  Weight	Approx. 220 g (60 g of the power supply unit)
  Housing protection	IP65 for the front panel, IP20 for the rear case, IP00 for terminals