Hirschmann MICE MS20/MS30 Switch Integration and Troubleshooting

Safety specifications for optical ports, PoE, and explosion hazardous areas

1. Compatibility between fiber optic and SFP modules

When long-distance transmission or strong electromagnetic interference environments are required, engineers will choose media modules with SFP slots such as MM4. Hirschmann original SFP transceiver must be used. Mixing third-party modules may result in device failure to recognize or mismatched optical power. In addition, different types of optical ports (such as LH, SX, LX) must not be mixed and must ensure that the wavelength and transmission distance parameters of the optical ports at both ends are completely matched.

2. PoE power supply module (MM22)

If power is required for IP cameras or wireless APs on site, the MM22-T1T1T1T1 PoE module can be used. This module outputs 48V DC voltage through idle line pairs (Pins 4/5 and 7/8). A dedicated external PoE power supply (such as RPS 60/48V EEC) must be used, and the length of the power cable should be less than 3 meters, with a cross-sectional area that meets the carrying requirements of 1.5A current.

3. Special requirements for hazardous locations

For MSxx equipment with ATEX or IECEx certification labels, the following specifications must be strictly followed when used in flammable and explosive gas environments:

The equipment must be installed inside an enclosure that provides at least IP54 protection level.

The USB interface and V.24 interface are only used for temporary connections during maintenance. In areas where explosive gases are known to exist, it is strictly prohibited to connect or disconnect these two interfaces, otherwise it may cause an explosion.

If a relay output (signal contact) is used, the current must be limited to within 100 mA of the resistive load.

The temperature level is T4, and the extended temperature model (T/E) allows operation in an environment of -40 ° C to+70 ° C, but it should be noted that the internal temperature of the equipment may be 20 ° C higher than the ambient temperature.

Common on-site troubleshooting and lifecycle maintenance

Fault 1: The device cannot be powered on, all LEDs are off

Troubleshooting: Check if the wiring of the power supply terminal block is correct (within the range of 18-32V or 18-60V). Use a multimeter to measure the voltage between pins 1 and 2 of the terminal block. Check if the non replaceable fuse at the power input end is blown. If using dual power supply, it is necessary to confirm whether the negative terminals of both power sources are reliably grounded.

Fault 2: Broadcast storm or frequent network disconnection on the network

Troubleshooting: Check the RM settings of the DIP switch. If a physical loop is formed in the network but HIPER Ring is not enabled, or if the ring network port configuration is incorrect, it will cause a broadcast storm. At this point, the RM LED status should be checked and the traffic situation of the port should be viewed using management software such as Industrial HiVision. In addition, check whether the crystal head of the network cable is oxidized and loose, and ensure that the cable shielding layer is correctly grounded.

Fault 3: The light port link light is not on

Troubleshooting: Confirm whether the wavelength and transmission distance of the SFP modules at both ends are consistent. Check if the fiber optic jumper is damaged (use a flashlight to illuminate one end and observe if there is light shining through the other end). Confirm if the fiber end face is clean, as dust and oil stains are common causes of excessive light attenuation. Note that after inserting the SFP module, the corresponding RJ45 electrical port will be automatically disabled, which is a normal phenomenon.

Fault 4: PoE device unable to supply power

Troubleshooting: Confirm if the external 48V PoE power supply is working properly and if the terminal block wiring is secure. Check if the connected PD device complies with the IEEE 802.3af standard (Class 0 or Class 3). Note that there is no electrical isolation between the PoE ports of the MM22 module.

Lifecycle management recommendations:

The front panel of the device is equipped with replaceable label paper. It is recommended that engineers print the module name, MAC address, IP address and other information clearly and insert them into the label slot during debugging to avoid accidentally unplugging cables during later maintenance.

Regularly connect the AutoConfiguration Adapter (ACA) via USB interface to backup device configuration, and follow the firmware updates on Hirschmann's official website for the latest features and security patches.