Meter specifications
For installation and wiring information, refer to the meter installation sheet.
Mechanical characteristics
IP degree of protection (IEC 60529-1) | Front display: IP51 |
Mounting position | Vertical |
Display type | 6 digit LCD |
Keypad | 1 button |
Front panel LED indicator | Energy flow LED |
Weight | ~ 0.08 kg |
Dimensions W x H x D | 17.5 x 117 x 63 mm max |
Electrical characteristics
Measurement accuracy
Active Energy |
A9MEM2050
A9MEM2055
|
Voltage inputs
Nominal voltage (U) | 230 V AC |
Operational voltage | 195 to 253 V AC |
Insulation capabilities |
AC voltage withstand: 4 KV for 1 minute Impulse voltage withstand: 6 KV for 1.2 μS waveform |
Operational frequency | A9MEM2050: 50/60 Hz ± 10% |
A9MEM2055: 50 Hz ± 10% |
Current inputs
Basic current (Ib) | 5 A |
Maximum rated current (Imax) | 45 A |
Operational current | 0.4%Ib – Imax |
Overcurrent withstand | 30 Imax for 0.01 s |
Operational frequency | A9MEM2050: 50/60 Hz ± 10% |
A9MEM2055: 50 Hz ± 10% |
Power consumption
Internal power consumption | ≤2 W/Phase - ≤10 VA/Phase |
Pulse characteristics
Test output flash rate (Red LED) | 10000 imp/kWh |
Pulse output rate | 10000/2000/1000/100/10/1/0.1/0.01 imp/kWh |
Pulse width |
≤5625 W: 32 ms >5625 W: 11.2 ms |
Environmental characteristics
Operating temperature | -25 °C to +55 °C (-13 °F to +131 °F) |
Storage temperature | -30 °C to +70 °C (-22 °F to 158 °F) |
Operating humidity | ≤75% |
Storage humidity | ≤95% |
Safety
Protective Class | II, Insulated encased meter of protective class |
Basic errors
0.05Ib |
Cosφ = 1 ±1.5% |
0.1Ib |
Cosφ = 0.5Lag ±1.5% Cosφ = 0.8Lead ±1.5% |
0.1Ib – Imax |
Cosφ = 1 ±1% |
0.2Ib – Imax |
Cosφ = 0.5Lag ±1% Cosφ = 0.8Lead ±1% |
RS-485 communications
Bus type | RS-485 |
Protocol | Modbus RTU with 16 bit CRC |
Baud rate | 1200, 2400, 4800, and 9600 (default) |
Address range | 1-247 user configurable |
Maximum bus load | 60 meters per bus |
Range | 1000 m |
Data storage
Backup period | The data can be stored for more than 10 years without power |