Model | LM3-DV | LM3-DA | LM3-AV | LM3-AA |
Dimensions: | LM3 : 96(W) x 48(H) x 68(D) mm |
Power supply | 100 - 240 V a.c. 50/60 Hz |
Power consumption | ▪LM3-N: 6 VA or less
▪LM3-3R/3RC: 10 VA or less
▪LM3-3RT: 11 VA or less
▪LM3-3NC/3PC: 9 VA or less
▪LM3-3NT/3PT: 10 VA or less |
Input signal | DC voltage | DC current | AC voltage / frequency | AC current / frequency |
Input range | 500 V / 100 V 50 V / 10 V 5 V / 1 V 200 mV / 50 mV | 5 A / 2 A 500 mA / 200 mA 50 mA / 4 - 20 mA 5 mA / 2 mA | 500 V / 250 V 110 V / 50 V 20 V / 10 V 2 V / 1 V | 5 A / 2 A 500 mA / 200 mA 50 mA / 20 mA |
AC measurement method | AVG/RMS selective measurement |
Input sampling period | 50 ms |
Input sampling method | OVER sampling method using continuous approximation A/D converter |
Maximum allowed input | F.S. of each input range 110% |
Frequency measurement range | 0.2 ~ 9999 Hz (Frequency measurement range depends on decimal point position) |
Display | ▪ Negative LCD display
▪ 4 digits 2 rows
▪ PV (White)
▪ SV (Green) |
Character size | ▪ LM3 : 17.6 x 10.6 mm |
Show maximum | -9999 ~ 9999 |
Show degree | ▪[ 23 ℃ ± 5 ℃ ] - F.S. ± 0.1 % rdg ± 2 digit ▪[ 23 ℃ ± 5 ℃, 5 A ] - F.S. ± 0.3 % rdg ± 3 digit ▪[ 50 ℃ ~ -10 ℃ ] - F.S. ± 0.5 % rdg ±3 digit | ▪[ 23 ℃ ± 5 ℃ ] - F.S. ± 0.3 % rdg ±3 digit ▪[ 23 ℃ ± 5 ℃, frequency ] - F.S. ± 0.1 % rdg ± 2 digit ▪[ 50 ℃ ~ -10 ℃ ] - F.S. ± 0.5 % rdg ± 3 digit |
Output control | ▪ Contact output: 3-phase, SPST (1a), 250 V a.c. 5 A
▪ Solid-state output: 3-phase, NPN or PNP open collector, 12 - 24 V d.c. 50mA or less |
Relay life time | ▪ Electrical (approx. 100,000 times, 250 V a.c. 5 A)
▪ Mechanical (approx. 5 million times) |
Optional output | ▪ Transmit output (4-20 mA)
▪ RS-485 output |
External input | ▪ HOLD/ZERO Optional Input
▪ No-voltage input
▪ Short-circuit impedance: 300 Ω or less
▪ Residual voltage: 1 V or less
▪ Open impedance: 100 kΩ or more |
Media | ▪ Communication protocol: Modbus－RTU
▪ Communication method: RS－485 (2－wire half duplex)
▪ Communication speed: 2400 / 4800 / 9600 / 19200 / 38400 bps |
Insulation resistance | 100 ㏁ or more (500 V d.c. Mega standard, between the conductive connector and the case) |
Withstand voltage | 2000 V a.c. 60 Hz 1 min (between the mains connector and the case) |
Noise | ± 2 kV (Between active power terminals, Pulse width = 1 us, Square wave noise generated by noise simulator) |
Anti-vibration | 10 - 55 ㎐, Single amplitude 0.5 ㎜, 3-axis angle, 2 hours |
Protective structure | ▪ IP66 (front)
▪ Terminal block protection cover applied |
Environmental temperature and humidity | -10 ~ 50 ℃, 35 ~ 85 % R.H. |
Storage temperature | -20 ~ 65 ℃ |