This manual describes the operation and programming of the ER-420M electronic cash register, including a user guide and a programming guide.
This manual covers getting started with the ER-420M, safety and servicing precautions, hardware description, and software features. It includes detailed sections on the front and rear displays, error codes, control lock, keyboards, and memory management.
The document also provides extensive programming information such as receipt control, PLU entry methods, tax and discount programming, RS232C communication options, and sample reports for clerks, groups, stock, and open checks.
| Keyboard | 48‑position keyboard with traditional raised keys |
|---|---|
| Standard PLU Capacity | 1000 PLUs and 20 Groups |
| Expandable PLU Capacity | Up to 9000 PLUs (contact dealer) |
| Battery Type | Rechargeable Ni‑MH battery |
| Radio Interference Class | Class A product |
| Printing System | Thermal printing system |
| Default Tax Settings | Preset with GST and Australian rounding |