The UNX4S is a single phase ANSI transformer-rated smart meter compliant with ANSI FM4S and relevant IEC standards. It features bidirectional measurement and two-way communication, supporting multi-tariff metering, load profile,monthly billing and event log..
Seamlessly integrated with Goldcard Power-tech’s AMI system and third-party management platforms, it is perfectly adapted to ANSI socket-type installation for smart metering in commercial and small industrial application scenarios.




Replaceable plug-in module support GPRS, 2G, 3G, 4G, 5G, G3-PLC, BPLC, RF, Wi-SUN and hybrid communication modes.

Supports pull and push data to realize remote meter reading, parameters programming, time synchronization, remote disconnection and reconnection, OTA upgrade and alarm report.

Features typical ±0.2% accuracy at standard test points for energy and demand measurement, complying with ANSI C12.20 Class 0.2 accuracy requirement.
| Meter model | UNX4S |
| Operating Voltage | 120/240V |
| Voltage range | 0.7 Un ~ 1.2 Un |
| Frequency | 60Hz ±5% |
| Degree of protection | IP54,UL50 |
| Insulating class | Class II |
| Connection type | FM4S (1P3W transformer-rated) |
| Accuracy Class | CA 0.2 (ANSI C12.20) Class 0.5 for Active (IEC 62053-22) Class 2.0 for Reactive (IEC 62053-23) |
| Communication interface | Optical port(ANSI type), RS485(Optional) GPRS/4G/G3-PLC/BPLC/RF/Hybrid/Wi-SUN module |
| Maximum Current | CL20 |
| Temperature Range: | -40 °C ~ +70 °C |
| Meter lifetime | ≥15years |