Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ProSoft Technology |
| Model | 5201-MNET-103M |
| Product family | ProLinx Gateway |
| Product type | Modbus TCP/IP to IEC 60870-5-103 Master Gateway |
| Ethernet interface | 1 × RJ45 |
| Ethernet protocol | Modbus TCP/IP |
| Modbus operating modes | Client and Server |
| Modbus server connections | Up to 5 clients |
| Modbus client capacity | 1 client connection; up to 100 servers/devices |
| Modbus command capacity | Up to 100 configurable commands |
| Serial interface | RS-232 / RS-422 / RS-485 |
| IEC protocol | IEC 60870-5-103 Master |
| IEC slave capacity | Up to 16 slaves |
| IEC sectors | Up to 3 per slave |
| Serial baud rate | 110–19,200 baud |
| Power supply | 24 VDC nominal; 18–36 VDC permitted |
| Maximum current | 500 mA at 24 VDC |
| Operating temperature | -20°C to +50°C |
| Storage temperature | -40°C to +85°C |
| Relative humidity | 5–95%, non-condensing |
| Mounting | DIN rail |
| Enclosure | Extruded aluminum |
| Serial isolation | 2,500 Vrms signal isolation |
| Port-to-ground isolation | Minimum 3,000 VDC |
Product Introduction
ProSoft Technology 5201-MNET-103M Communication Gateway
The ProSoft Technology 5201-MNET-103M is a standalone ProLinx communication gateway that connects Modbus TCP/IP networks with IEC 60870-5-103 slave devices. Its Ethernet driver supports both client and server operation, while its configurable serial interface operates as an IEC 60870-5-103 master. The gateway can monitor and control up to 16 IEC 103 slave devices, making it suitable for integrating electrical protection and monitoring equipment into industrial supervisory systems.
The module uses an internal data register database to exchange information between the Ethernet and serial networks. Configuration includes communication speed, parity, data-link addressing, ASDU addressing, response timeout, and retry settings. It is a legacy ProLinx product, and ProSoft’s published replacement directory currently lists no direct replacement for this exact model.
5201-MNET-103M
Application Scenarios & Field Pitfalls
Typical application scenarios
- Electrical substation integration: Connect IEC 60870-5-103 protection relays to a Modbus TCP/IP supervisory network.
- Power system monitoring: Transfer relay measurements, status information, and event data to a SCADA or industrial monitoring application.
- Industrial energy management: Integrate electrical protection devices into plant-level monitoring systems.
- Legacy protocol conversion: Maintain communication between existing IEC 103 serial devices and Ethernet-based control infrastructure.
Field pitfalls and verification points
- Master/slave configuration: The gateway operates as the IEC 103 master. Confirm that connected protection devices are configured as compatible IEC 103 slaves.
- Address mapping: Each slave requires the correct data-link address and Common ASDU Address. Incorrect addressing can cause communication failures even when the serial link is electrically sound.
- Serial wiring: Confirm whether the application uses RS-232, RS-422, or RS-485. Check terminal assignments, polarity, termination, and grounding before commissioning.
- Baud rate and parity: Match the gateway configuration to the relay settings. Incorrect serial parameters can produce intermittent communication or complete link failure.
- Modbus register mapping: Review the internal database and Modbus address offsets. Verify data types, register scaling, and command direction before connecting the gateway to a live control system.
- Time synchronization: Check IEC 103 time synchronization settings and the time source used by the master application. Incorrect timestamps can complicate event analysis.
- Configuration backup: Preserve the original ProSoft Configuration Builder project before replacing or reconfiguring the unit.
- Power supply: Use a regulated 24 VDC supply within the documented 18–36 VDC input range.
Related Products
- 5201-MNET-101S — ProLinx Modbus TCP/IP gateway for IEC 60870-5-101 serial communication; different IEC protocol.
- 5201-MNET-MCM — Modbus TCP/IP to Modbus serial communication gateway.
- 5201-MNET-DFNT — Modbus TCP/IP to EtherNet/IP gateway.
- 5201-MNET-BACNET — Modbus TCP/IP to BACnet gateway.
- 5201-104S-103M — IEC 60870-5-104-related gateway configuration; verify its exact communication architecture before comparison.
- PLX31-MBTCP-MBS — Modern ProSoft Modbus TCP/IP and Modbus serial gateway; not a direct IEC 60870-5-103 replacement.
Procurement and replacement note: ProSoft identifies the 5201-MNET-103M as a legacy product and lists no direct replacement. A newer Modbus gateway should not be treated as equivalent unless it supports the IEC 60870-5-103 master role, required slave count, data mapping, and control commands. For replacement evaluation, retain the original configuration file and document the relay addresses, serial parameters, Modbus register map, and time-synchronization settings before removing the existing unit.
