What Is Single-phase Digital Panel Ammeter？
The ZHIMING ZM-AA/DA Series Single-phase Digital Panel Ammeter delivers Class 0.5 high-precision measurement of single-phase AC and DC current with a bright 7-segment digital tube display and local data query function. It features programmable CT/shunt ratio settings, RS-485 communication using Modbus-RTU protocol, and supports switch input/output and analog retransmission (4–20mA or voltage) for flexible system integration. With a wide-range auxiliary power supply of AC/DC 80V–270V or AC 220V and multiple panel sizes including 48mm, 72mm, and 96mm, this Digital Panel Ammeter adapts to various switchgear, PFC cabinets, and electrical panel configurations.
Working Conditions of the Single-phase Digital Panel Ammeter
- Operating Temperature — -10°C to +55°C
- Storage Temperature — -25°C to +70°C
- Humidity — Relative humidity ≤ 93%, no corrosive gas present
- Altitude — No more than 2500m
Ürün Parametreleri
| Parametre | Şartname |
|---|---|
| Doğruluk | Current: Class 0.5 |
| Connection Mode | Single phase |
| Nominal Akım | AC 1A, AC 5A; DC 20mA, DC 1A, DC 5A, DC 75mV |
| Overload Capacity | 1.2× rated continuous, 10× rated / 5s instantaneous |
| Signal Power Consumption | <0.4VA per phase |
| Impedance | <20mΩ |
| Frequency Range | 45–65Hz |
| Auxiliary Power Supply | AC/DC 80V–270V, AC 220V; Power consumption <4VA |
| İletişim Arayüzü | 1× RS-485, Modbus-RTU protocol; Baud rate 1200–9600 bps (default 2400 bps) |
| Switch Input | 2 dry contact inputs |
| Switch Output | 2 relay outputs, AC 250V/5A, DC 30V/5A |
| Analog Output | 1× 0/4–20mA or 0–5/10V |
| İzolasyon Direnci | >100MΩ |
| AC Withstand Voltage | AC 2kV |
| Electrostatic Discharge (ESD) | Class 4 |
| Electrical Fast Transient Burst | Class 4 |
| Surge (Impact) | Class 4 |
Why Choose ZHIMING's Single-phase Digital Panel Ammeter?
Class 0.5 High-Precision Current Measurement
The Single-phase Digital Panel Ammeter achieves Class 0.5 accuracy for both AC and DC current measurement, supporting a wide rated input range from AC 1A/5A to DC 20mA/1A/5A/75mV shunt input.
Multi-Interface Communication & I/O
Equipped with RS-485 Modbus-RTU communication, dual switch inputs, dual relay outputs (AC 250V/5A, DC 30V/5A), and one analog retransmission channel (0/4–20mA or 0–5/10V), this Digital Panel Ammeter integrates seamlessly into automation and SCADA systems.
Wide-Range Power Supply & EMC Protection
An ultra-wide auxiliary power input of AC/DC 80V–270V or AC 220V ensures reliable operation under fluctuating supply conditions, while Class 4 EMC immunity (ESD, EFT, Surge), >100MΩ insulation resistance, and AC 2kV withstand voltage guarantee stable performance in harsh electrical environments.
Flexible Panel Sizes & Easy Installation
Available in three standard panel sizes — 48mm, 72mm, and 96mm — this Digital Panel Ammeter fits diverse switchgear, PFC cabinets, and control panel cutouts. The 7-segment LED display and local data query function enable quick on-site reading without additional tools or software.
SSS
What current types and ranges can this Single-phase Digital Panel Ammeter measure?
The ZM-AA/DA Series supports single-phase AC current (1A, 5A) and DC current (20mA, 1A, 5A, 75mV shunt input). The CT or shunt ratio is programmable, allowing the display to scale to virtually any primary current range for flexible application in different metering scenarios.
How does the RS-485 communication work on this Digital Panel Ammeter?
The ammeter features one RS-485 channel operating on the Modbus-RTU protocol, with configurable baud rates from 1200 to 9600 bps (default 2400 bps). It connects directly to PLCs, HMIs, and energy management platforms for remote monitoring, data logging, and parameter configuration.
What panel sizes are available for different cabinet installations?
The Single-phase Digital Panel Ammeter comes in three standard form factors: 48mm, 72mm, and 96mm panel cutout sizes, covering most common switchgear, PFC cabinet, and control panel requirements.
Can this ammeter output analog signals for external controllers?
Yes. In addition to RS-485 digital communication, it provides one analog retransmission output (0/4–20mA or 0–5/10V, programmable) and two relay outputs for alarm signaling or load control. Two dry contact switch inputs are also available for status monitoring.
What are the operating environment requirements for this Digital Panel Ammeter?
The meter operates reliably in ambient temperatures from -10°C to +55°C, with storage tolerance from -25°C to +70°C. Relative humidity should not exceed 93% without corrosive gases, and the maximum installation altitude is 2500m.
