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
Model Designation
| 452A | - | □ | - | □ | - | □ | - | □ | - | □ | - | □ |
| ① | ② | ③ | ④ | ⑤ | ⑥ |
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 |
