How to install Hirschmann MS20/MS30 series industrial Ethernet switches?

2. System startup verification waits for the RUN LED to turn green and remain on, indicating that the system is ready; Flashing=Starting; Not lit=system failure startup failure (RUN LED not lit), still abnormal after power failure and restart, contact technical support

3. Port status verification 1. Connect terminal devices (such as PCs/switches); 2. Press the "SELECT" button for ≥ 2 seconds to switch to the "L/D" mode. The port LED green light remains on, indicating link establishment; Flashing=No link for data transmission (LED not lit): Check cable/terminal device port

4. Redundancy function verification (if HIPER Ring is configured) 1. After the ring network connection is completed, the RM LED green light remains on; 2. Disconnect one ring link, RM LED turns yellow and stays on, RM LED green=redundant ready; Yellow light=Redundant activation (link failure) No redundant switching: Check ring port configuration/DIP switch position

5. Initial login verification: 1. Log in to the device through V.24/WEB; 2. Successfully logged in by entering the default account (admin/private), but the system prompts that changing password login failed: check IP configuration (default DHCP get) or password input error

Common troubleshooting (quickly locate by phenomenon)

Possible causes of malfunction, troubleshooting steps, and solutions

1. P1/P2 LED does not light up after power on. 1. The power supply voltage exceeds the range; 2. Connect the positive and negative poles of the power supply in reverse; 3. Poor terminal contact; 4. Power failure: 1. Measure the power supply voltage with a multimeter (must comply with 18-32/60V DC); 2. Check the terminal wiring and re tighten it; 3. Replace the power supply for testing. 1. Adjust the power supply voltage to the compliant range; 2. Correct the positive and negative wiring; 3. Replace the faulty power supply

2. RUN LED flashes and then goes out. 1. System startup failed; 2. Hardware failure (such as media module not installed properly) 1. Reinstall the media module/SFP after power failure; 2. Disconnect all external connections, keep only the power supply, power on for testing. 1. Ensure that the module is installed properly; 2. Still failed, contact technical support to return to the factory for maintenance

3. Port without link (LED not lit) 1. Data cable failure; 2. Terminal device port failure; 3. The port is disabled; 4. Automatic negotiation shutdown: 1. Replace the cable for testing; 2. Connect to other terminal device ports; 3. Enable ports through CLI/WEB; 4. Confirm that the automatic negotiation of the port has been activated. 1. Replace the qualified cable; 2. Repair terminal device ports; 3. Enable port: CLI command "no shutdown interface<port>"

4. Redundancy function not effective (RM LED not lit) 1. DIP switch RM key not turned ON; 2. Ring port configuration error; 3. The ring network is not closed. 1. Check the position of the DIP switch RM key; 2. Confirm that the ring ports are two consecutive ports (such as module 1 ports 1-2); 3. Check the ring network connection to ensure it is closed. 1. Turn the RM key to ON. 2. Reconfigure the ring port; 3. Closed loop network link

5. Unable to log in to device 1. IP address acquisition failed (DHCP not responding); 2. Password error; 3. Disable WEB/Telnet services. 1. Manually configure IP (CLI command "network parms<IP><subnet mask><gateway>"); 2. Restore default password (via System Monitor); 3. Enable WEB/Telnet (CLI command "ip http server" "transport input telnet") 1. Ensure that the device is on the same network segment as the PC; 2. Change the default password immediately after restoring it; 3. Enable management services

6. PoE port is not powered (terminal device does not start) 1. PoE module is not powered; 2. The terminal device does not comply with IEEE 802.3af; 3. The PoE port is disabled. 1. Check the external power supply (48V DC) of the PoE module; 2. Confirm that the terminal device is PoE Class 0-3; 3. Enable PoE port through WEB 1. Connect the PoE module for power supply; 2. Replace terminal devices that meet the standards; 3. Enable PoE port: WEB path "Basic Settings → PoE → Port Enable"

7. There is no data transmission at the fiber optic port. 1. The type of fiber optic jumper does not match (multimode/single-mode hybrid); 2. Fiber end face contamination; 3. Transmission distance exceeds the limit. 1. Confirm that the SFP and jumper types are consistent (MM SFP with multimode jumper); 2. Clean the end face with specialized cleaning paper; 3. Check the transmission distance (e.g. maximum 25km for SM SFP). 1. Replace the matching fiber optic jumper; 2. Clean the end face; 3. Shorten transmission distance or replace long-distance SFP

Closing work after installation completion

Operation Item Operation Content Remarks

1. Label pasting: Paste the filled in labels (device name, IP address, MAC address) onto the front of the device with clear and visible labels for easy maintenance in the future

2. Cable organization uses zip ties to secure cables, avoiding cable pulling on terminals/ports. Explosion proof zip ties are required in hazardous environments, and cables should be routed away from power lines