Description
Product Overview
The Moxa MS4128-L3P is a Layer 3 managed industrial Ethernet switch designed for large-scale automation networks requiring advanced switching, routing, and network management capabilities. Part of the Moxa industrial networking portfolio, this switch provides a high-density communication platform for connecting PLC systems, DCS controllers, remote I/O stations, HMIs, surveillance devices, and industrial computing equipment. The Moxa MS4128-L3P is commonly deployed in transportation, power automation, manufacturing plants, and process industries where reliable Ethernet communication is required across distributed control architectures.
The Moxa MS4128-L3P supports managed Layer 2 and Layer 3 networking functions, including VLAN configuration, multicast filtering, static routing, network redundancy features, and traffic management. The modular design allows integration of copper Ethernet and fiber optic interfaces according to application requirements, providing flexibility when building industrial communication backbones. Through its management functions, the switch helps engineers segment automation networks, isolate critical control traffic, and simplify troubleshooting during plant operation.
The Moxa MS4128-L3P remains a practical choice for maintaining established industrial Ethernet installations where network architecture has already been engineered around Moxa managed switching technology. Typical applications include control system expansions, industrial Ethernet upgrades, and replacement of aging communication equipment in production facilities. Before replacement, engineers should verify port configuration, firmware revision, fiber transceiver requirements, network topology, and existing switch configuration files. To be completely transparent, replacing a managed industrial switch is not only a hardware exchange; incorrect VLAN, routing, or redundancy settings can interrupt communication between controllers and field devices even when the switch powers up normally.
Product Introduction (Non-Templated)
A network switch failure in an automation environment can affect dozens of controllers and remote devices at once. The Moxa MS4128-L3P provides a managed Ethernet platform for restoring industrial communication paths while preserving existing network structures.
Designed for Layer 3 industrial networking, this switch supports advanced routing, VLAN segmentation, and high-density port connectivity for DCS integration, PLC networks, and industrial Ethernet infrastructure maintenance.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | MS4128-L3P |
| Manufacturer | Moxa |
| Product Type | Layer 3 Managed Industrial Ethernet Switch |
| Port Configuration | Up to 28 Ethernet ports (configuration dependent) |
| Ethernet Speed | 10/100/1000 Mbps Gigabit Ethernet options |
| Switching Capacity | Application dependent |
| Routing Function | Layer 3 static routing |
| Network Management | Web, CLI, SNMP management |
| VLAN Support | IEEE 802.1Q VLAN |
| Redundancy Support | Industrial redundancy protocols (configuration dependent) |
| Fiber Support | SFP fiber modules (model configuration dependent) |
| Power Input | Industrial DC power supply |
| Installation | DIN rail / rack mounting options depending on configuration |
| Operating Temperature | Industrial temperature options available |
| Diagnostics | Event logging, alarms, network monitoring |
| Application | Industrial Ethernet, automation networks, control systems |
| Condition | New Surplus, Factory Sealed |
MS4128-L3P
Related Products
- Moxa MS4128-L3 — Similar Layer 3 managed switch platform without PoE capability. Used for industrial backbone networks where powered devices are not required.
- Moxa MS4128 — Layer 2 managed switch variant designed for applications requiring high-density Ethernet connectivity without routing functions.
- Moxa PT-7728 Series — Industrial Ethernet switch family designed for power automation and substation communication applications.
- Moxa EDS-728 Series — Managed industrial Ethernet switch with modular port architecture for factory automation and transportation networks.
- Moxa EDS-G509 Series — Gigabit managed Ethernet switch used for high-speed industrial network connections.
- Moxa IKS-G6824A Series — High-density Gigabit Ethernet switch platform designed for large industrial communication systems.
- Moxa TN-5500A Series — Industrial Ethernet switches designed for harsh transportation and outdoor applications.
- Moxa MGate Series — Industrial communication gateways used alongside Ethernet switches for protocol conversion between automation systems.
Frequently Asked Questions (FAQ)
1. Is the Moxa compatible with my existing industrial Ethernet network?
Compatibility depends on the current network design.
Verify:
- Existing port count and media type
- Fiber module requirements
- VLAN configuration
- IP addressing plan
- Routing settings
- Network redundancy method
The switch hardware must match the existing communication architecture.
2. Can I hot-swap this?
The is not normally treated as a hot-swappable PLC component.
Recommended replacement steps:
- Save the current switch configuration
- Document VLAN and routing settings
- Place affected equipment in a controlled state
- Replace the switch hardware
- Restore configuration
- Test controller communication
Managed network devices require configuration validation after replacement.
3. Does the support firmware v3.1?
Firmware compatibility depends on the exact hardware revision and Moxa firmware release.
Check:
- Current firmware version
- Configuration backup compatibility
- Network management software version
- Installed interface modules
The firmware revision should be matched before deployment.
4. Will I lose my network configuration when replacing the ?
The replacement switch does not automatically contain the original network settings.
Before replacement:
- Export configuration file
- Record IP addresses
- Save VLAN assignments
- Document routing rules
- Backup security settings
Restoring the configuration is essential for maintaining communication.
5. How can I verify a New Surplus Moxa is authentic?
Recommended checks:
- Confirm Moxa model label
- Verify serial and hardware markings
- Inspect Ethernet ports and housing
- Check included accessories
- Review inspection records
For industrial networking equipment, configuration history is a key part of verification.
6. Can the support a legacy PLC/DCS network upgrade?
Yes, when the existing automation system requires managed Ethernet expansion.
Common applications:
- PLC network replacement
- DCS communication backbone maintenance
- Remote I/O network expansion
- Industrial Ethernet modernization
Network topology should be reviewed before installation.
7. What should engineers check before commissioning this switch?
Key checks include:
- Verify power supply voltage
- Confirm fiber/copper connections
- Restore switch configuration
- Test VLAN communication
- Verify routing tables
- Check controller connectivity
These checks confirm that the industrial network is operating according to the original design.
