Meter specifications
The specifications contained in this section are subject
to change without notice.
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 | 50/60 Hz ± 10% |
Current inputs
| Basic current (Ib) | 5 A |
| Maximum rated current (Imax) | 45 A |
|
Operational current range |
0.4%Ib – lmax |
| Overcurrent withstand | 30 Imax for 0.01 s |
| Operational frequency | 50/60 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 | -40 °C to +70 °C (-40 °F to +158 °F) |
| Storage temperature | -40 °C to +80 °C (-40 °F to 176 °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, 9600 (default), 19200 , and 38400 |
| 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 |