Description
Technical Parameters
Device Interface Resources
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1 × RS232 port (for maintenance):
Used for device maintenance and software upgrade, configuration upload/download via Vmmi software, and version reading.
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2 × RS232/RS485 multiplex ports (selected by jumpers):
Support T-CDT, R-CDT, M101 protocol, Modbus protocol (for protection devices), A101 protocol (for protection devices), DLT645 protocol (for electricity meters), and intelligent interfaces.
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3 × RS485 ports:
Support Modbus protocol (for protection devices), A101 protocol (for protection devices), DLT645 protocol (for electricity meters), and intelligent interfaces.
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2 × CAN ports:
Support CAN communication for connecting protection devices.
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2 × Ethernet ports:
Support IEC104 protocol.
Main Features
Main Technical Parameters
Electrical Parameters
- Power supply: AC/DC 220V (110V available upon request)
- Frequency: 50Hz
- Power consumption: ≤ 2W (whole device)
Communication Ports
2.2.1 Ethernet Interface
- Quantity: 2 channels
- Speed: 10/100M
- Communication medium: standard 8-core twisted-pair cable
- Supported protocols: all TCP/IP-based communication protocols
2.2.2 Serial Communication Interface
- Quantity: 6 channels (1 × RS232 for maintenance, 2 × RS232/RS485 multiplex, 3 × RS485)
- Communication mode: RS232 / RS485
- Baud rate: 1200bps, 2400bps, 4800bps, 9600bps, 19200bps, 115200bps
- Communication medium: shielded twisted-pair cable
- Supported protocols: various serial communication protocols
2.2.3 CAN Communication Interface
- Quantity: 2 channels
- Communication mode: CAN
- Baud rate: 100Kbps
- Bit error rate: < 10⁻¹⁹
- Communication medium: shielded cable
- Supported protocols: various CAN bus‑based communication protocols
2.2.4 Device Capacity
- Connected devices: ≤ 128 units
- Data capacity per device:
- Telemetry points: ≤ 64
- Tele-signaling / tele-control points: ≤ 128
- Tele-adjustment points: ≤ 8
- Energy metering points: ≤ 16
- SOE event buffer: ≤ 128 records
- Protection event buffer: ≤ 128 records
- Forwarding channels: ≤ 3 (customizable for special requirements)
- Single-channel forwarding data capacity: customizable as required, typically ≤ 2048 points
Insulation Performance
Mechanical Performance
b) Transportation conditions: withstand vibration endurance, shock endurance and bump tests at severity Level I.
Electromagnetic Interference Resistance
2.5.1 High-frequency Interference
2.5.2 Electrostatic Discharge Interference
10 positive and 10 negative discharges are applied to operator-accessible surfaces at intervals ≥1s. Temporary indicator errors are allowed during testing.
2.5.3 Fast Transient Interference
Environmental Conditions
- Operating: –25℃ ~ +60℃
- Storage: –25℃ ~ +70℃
Application Scope
electrical monitoring systems in power plants,
comprehensive automation systems for hydropower stations,
substation integrated automation systems,
power plant integrated automation systems,
intelligent building power monitoring,
industrial power supply and distribution automation systems, etc.
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