| Description |
| RTC top module 6701 |
| RTC top module + energy calculator + hourly data logger 6702 |
| RTC top module + PQ limiter + hourly data logger 6703 |
| RTC top module + data output + hourly data logger 6705 |
| RTC top module + 66-C compatibility and pulse outputs CE and CV 6706 |
| RTC top module + Mbus -require external supply 6707 |
| RTC top module + 2 pulse outputs for energy + volume + hourly data logger 6708 |
| RTC top module + vol calculation and hourly data logger 6709 |
| RTC top module + hourly data logger + 2 pulse outputs + scheduler 670A |
| RTC top module + 2 pulse outputs for CE and CV prog data logger 670B |
