Description
3WIRE DC4CH
DC4CH 4 Channels DC Smart Energy Meter
The 3WIRE DC4CH is a DIN rail smart DC energy meter designed for 1 to 4 channels of DC power metering. It is suitable for DC equipment, -48V DC power supply systems, communication power systems, building automation systems, industrial DC loads and multi-channel DC energy monitoring applications.
DC4CH uses multiple high-precision energy metering chips to provide channel-level measurement of DC voltage, current, power and energy. It supports RS485 communication and can exchange data with a computer, gateway, BMS, EMS, SCADA or IoTWatt 4.0 platform.
Meter Type DC smart energy meter
Channels 1 to 4 DC power supply channels
Rated Voltage -48V DC system, input -60V to -40V
Communication RS485, Modbus and related DC monitoring protocols
Product Description
DC4CH is designed for multi-channel DC electricity consumption monitoring. It provides channel-level visibility for DC current, voltage, energy and power. The meter can also store energy records, freeze data, record alarms and support monthly energy settlement.
It is suitable for factories, residential DC systems, DC power supply cabinets, communication power supply systems, building automation DC equipment, telecom power rooms, battery-backed DC distribution systems and other DC metering applications.
Best use case: DC4CH is suitable when several -48V DC circuits must be monitored separately from one DIN rail smart meter, with RS485 communication and local data storage.
Key Features
1 to 4 DC Channels
Supports DC power metering for 1 to 4 channels from one compact DIN rail device.
High-Precision Metering Chips
Uses multiple high-precision energy metering chips to achieve multi-channel DC metering.
Per-Channel Measurement
Each channel can measure current, voltage, power and energy independently.
Monthly Energy Settlement
The meter automatically performs energy settlement on the auto meter reading day of each month.
24-Month Energy Records
Monthly settlement data for the last 24 months is saved inside the meter.
Minute Data Storage
Stores voltage, current, power, energy and timestamp once every minute, with 1,500 records per data item per channel.
Hourly Freeze Records
Freezes voltage, current, power, energy and timestamp once every hour for historical reference.
Alarm Recording
Records and stores the latest 500 alarm records, including events such as undervoltage, overvoltage and power failure.
RS485 Remote Access
Data can be read through RS485, with support for broadcast time calibration and remote time calibration.
Typical DC4CH System Architecture
DC4CH can be installed inside a DC distribution cabinet or automation panel. It measures up to four DC power supply channels and sends data through RS485 to a gateway, BMS, EMS, SCADA or IoTWatt 4.0 for monitoring, alarms and reporting.
1 DC Power Supply
2 1–4 DC Loads
3 DC4CH Meter
4 RS485 Data
5 IoTWatt / EMS / SCADA
Main Functions
| Function |
Description |
Operational Value |
| Combined Energy |
Each channel can measure current combined energy and current-month electricity consumption. |
Useful for DC energy allocation and month-to-month usage review. |
| Channel Measurement |
Each channel can measure current, voltage, energy and power. |
Provides visibility of individual DC circuit behaviour. |
| Event Alarm |
Records and alarms events such as undervoltage, overvoltage and power failure. |
Helps identify abnormal DC supply and load conditions. |
| Monthly Settlement |
Automatic energy settlement on the auto meter reading day of each month. |
Supports billing-style monthly DC consumption review. |
| Minute Storage |
Stores voltage, current, power, energy and timestamp once every minute. |
Supports load trend review and operational analysis. |
| Hourly Freeze |
Freezes voltage, current, power, energy and timestamp once every hour. |
Supports periodic historical snapshot records. |
| Monthly Freeze |
Stores monthly freezing energy for each month, with 24 records. |
Supports 24-month historical energy tracking. |
| Remote Communication |
Supports remote communication, telemetry, remote monitoring and remote regulation. |
Allows integration into monitoring systems through RS485. |
Technical Parameters
| Parameter |
DC4CH Specification |
| Input Mode |
1 to 4 channel DC power supply. |
| Rated Operating Voltage |
-48V DC. |
| Input Voltage |
-60V to -40V. |
| Measuring Range |
Specified working voltage: 0.8Un to 1.1Un. Extended working voltage: 0.6Un to 1.1Un. |
| Input Current Options |
50A, 100A, 200A, 400A and 600A. |
| Impulse Constant |
6400 imp/kWh. |
| Energy Measurement Range |
0 to 39999999.99 kWh. |
| Power Range |
0 to 99.9999 kW. |
| Accuracy Class |
1.0 / 2.0. |
| Clock Accuracy |
≤ 0.5s/day at 23°C; variation with temperature change better than 0.1s/day. |
| Display |
LCD display with loop display of parameters for each channel. |
| Standby Power Consumption |
≤ 2W. |
| Altitude |
≤ 5000m. |
| Working Temperature |
-20°C to +60°C. |
| Storage Temperature |
-40°C to +70°C. |
| Working Humidity |
≤ 98% at 40°C ± 2°C, no condensation. |
| Installation |
35mm standard DIN rail installation. |
| Dimensions |
106.5 mm × 87.5 mm × 59 mm. |
| Weight |
Approximately 0.25kg. |
Communication Protocols
DC4CH supports RS485 communication for data exchange with a computer, gateway or monitoring system. The communication protocol conforms to Modbus and also supports the listed multifunctional energy meter and DC power monitoring communication standards.
| Protocol / Standard |
Description |
| Modbus |
Used for RS485 communication with gateways, computers, EMS, BMS, SCADA and IoTWatt 4.0 systems. |
| DL / T 645-2007 |
Multifunctional Energy Meter Communication Protocol. |
| YD / T 1363.3-2005 |
Communication Office / Station Power Supply, Air Conditioning and Environment Centralized Monitoring and Management System, Part 3: Front End Intelligent Equipment Agreement. |
| RS485 Baud Rate |
Settable from 600 to 9600 bps. Default communication parameter: 2400, even parity, 8 data bits, 1 stop bit. |
| Time Calibration |
Supports broadcast time calibration and remote time calibration through RS485. |
Connection Diagram and Dimensions
The DC4CH datasheet shows a compact DIN rail form factor with RS485 terminals, four channel indicators and lower terminal groups for L1, L2, L3, L4 and GND -48V wiring. The meter body dimension is approximately 106.5 mm × 87.5 mm × 59 mm.
DC4CH Wiring Diagram and Dimensions
Typical Applications
Telecom DC Power Systems
Monitor -48V DC circuits in telecom power systems, communication rooms and station power supply panels.
DC Distribution Cabinets
Measure up to four outgoing DC circuits from one compact DIN rail meter.
Building Automation DC Loads
Monitor DC power supply circuits used in automation, control and low-voltage DC systems.
Industrial DC Equipment
Track energy consumption of DC equipment in factories and industrial installations.
Battery-Backed Systems
Useful for monitoring DC circuits in UPS, battery and backup power distribution arrangements.
IoTWatt 4.0 DC Monitoring
Use DC channel data for dashboards, DC energy tracking, alarms and operational analytics.
Integration with IoTWatt 4.0
When connected to IoTWatt 4.0, DC4CH provides DC circuit-level data for dashboards, DC equipment energy monitoring, alarm visibility, trend analysis and energy reporting. This is useful where both AC and DC electrical consumption must be monitored under one platform.
- Monitor 1 to 4 DC channels from one DIN rail meter.
- Track DC voltage, current, power and energy by channel.
- Use minute storage and hourly freeze records for operational review.
- Use alarm records to identify undervoltage, overvoltage and power failure events.
- Use monthly settlement and 24-month records for energy tracking.
- Connect through RS485 using a gateway such as RS2LAN, RS2MQTT or RS2WLAN.
Integration note: DC4CH is suitable for IoTWatt 4.0 projects where DC power supply systems, telecom DC loads, industrial DC equipment or -48V DC distribution circuits need to be monitored together with the site’s AC energy data.
Recommended Deployment Checklist
- Confirm the number of DC channels required, from 1 to 4 channels.
- Confirm rated DC system voltage and verify -48V input range compatibility.
- Confirm input current option: 50A, 100A, 200A, 400A or 600A.
- Confirm wiring polarity, L1 to L4 channel mapping and GND -48V reference.
- Confirm 35mm DIN rail installation space and terminal access.
- Confirm RS485 Modbus settings, including baud rate, address, parity and wiring.
- Confirm time synchronisation and remote calibration requirement.
- Confirm monthly settlement date, freeze records and alarm record settings.
- Confirm integration with EMS, BMS, SCADA, gateway or IoTWatt 4.0.
- Test voltage, current, power, energy, RS485 communication, alarms and data records during commissioning.
DC4CH Supply, Commissioning and IoTWatt 4.0 Integration
Saturn Pyro supports 3WIRE DC4CH DC 4 Channels Smart Energy Meters for -48V DC metering, telecom DC power monitoring, DC distribution cabinet monitoring, RS485 Modbus integration, EMS / BMS / SCADA connectivity and IoTWatt 4.0 digital energy audit projects in Malaysia.
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