Step 1. Answer the questions below regarding your upgrade needs
| Wye or Delta | |
| Need a mix of 1A/5A phase and Ground CTs? | |
| If power supply is HI-volt AC, need less than 88VAC? | |
| If power supply is LO-volt, is AC voltage required? | |
| Any 735 Mods installed? | |
| Need RS422 communications? | |
| Need baud rate 1200 or 2400bps? | |