HIRSCHMANN MS20/MS30 series industrial Ethernet switches

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

3.3 Power Supply and Grounding

SELV/PELV power supply: The equipment is designed to use safe ultra-low voltage power supply and must be connected to SELV/PELV circuits that comply with IEC 60950-1 or IEC/EN 62368-1 standards.

Grounding: The lower panel of the equipment can be grounded through DIN rails or through independent grounding screws. The manual specifically warns that when supplying DC power, the negative terminal of the voltage input must be grounded.

Installation and Debugging Guide

The manual provides a detailed step-by-step installation guide to ensure that the equipment can be put into operation correctly and safely.

4.1 Mechanical Installation

DIN rail installation: The device can be easily installed on a 35mm DIN rail (compliant with DIN EN 60715 standard). When installing, hang the card slot on the upper part of the device into the guide rail, use a screwdriver to pull down the guide rail lock slider, press the lower part of the device against the guide rail, and then release the slider to lock it into place.

Media module installation: The media module supports hot swapping and can be installed or removed while the device is running. Insert the module into the slot from left to right and tighten the screws at the four corners during installation.

4.2 Electrical Connections

Power supply and signal contacts: Depending on different voltage ranges, the equipment is equipped with 4-pin or 6-pin pluggable terminal blocks for connecting the main power supply (supporting redundant power supply) and signal relay contacts. The signal contact is a passive relay contact that can be used for remote diagnosis. When there is a power failure, equipment failure, or link interruption, the contact opens and sends an alarm signal.

PoE power supply: For PoE media modules (such as MM22-T1T1T1), an external 48V DC power supply (recommended to use Husman RPS 60/48V EEC power supply) needs to be connected through a 3-pin terminal block to power the connected PD devices.

4.3 DIP switch configuration

The DIP switch at the bottom of the device is used to quickly configure critical redundant functions without entering the software interface.

4-pin DIP switch (standard type): configurable with RM (redundant manager) function, HIPER Ring ring port, and Stand by (backup coupling) function.

3-pin DIP switch (... E... model): Similar in function, but with slightly different definitions of ring network ports, and can achieve more complex combinations of redundant modes.

4.4 Data Cable Connection

Twisted pair port: It is recommended to use shielded cables in strong electromagnetic interference environments and ensure that power and data cables are routed separately, ideally at a 90 degree angle.

Fiber optic ports: When connecting, it is necessary to ensure that the port type matches (such as LH to LH, SX to SX), and pay attention to the attenuation and bandwidth length product of the optical cable.

Rich ports and display options

5.1 Overview of Media Modules

The manual provides a detailed list of various media module models and specifications to meet the connection requirements of different distances and media.

MM2/MM3 series: Provides multiple 100Mbps port combinations, such as 4 RJ45 ports (MM2-4TX1), 4 multimode fiber ST ports (MM3-4FLM4), and a hybrid module of electrical and optical ports.

MM4 series: Provides gigabit Combo ports (such as MM4-4TX/SFP), each port can use the built-in RJ45 electrical port or insert SFP optical modules.

MM22 PoE module: Supports IEEE 802.3af standard and can provide power to terminal devices such as IP phones and cameras through Ethernet cables.

MM24 Digital I/O Module: Provides 4 digital inputs and 4 digital outputs, which can be used to control different actuators in the system.

5.2 LED Status Indication

The abundant LED indicator lights provide great convenience for on-site fault diagnosis.

Equipment status LEDs (P, P1, P2, RM, RUN, RL1, RL2): display power status, system operation status, redundancy manager status, and relay alarm status.

Display status LED (L/D, FDX, 1000, AN, RING, STBY, etc.): By using the "SELECT" button on the basic module, the display meaning of the media module port LED can be switched, such as displaying link/data status, duplex mode, speed, ring network port allocation, etc.

Port status LED: Each port corresponds to a dual color LED, whose display content is determined by the "display status" and can indicate information such as link establishment, data transmission, half duplex/full duplex, transmission rate, etc.

Technical specifications and performance data

The manual provides detailed electrical, environmental, and physical specifications in the technical data section.

Power supply: Supports redundant inputs of 18-32V DC or 18-60V DC, with power consumption ranging from 5W to 18W depending on the configuration. Built in non replaceable fuse.

Signal contact: The maximum switch voltage is 60V DC or 30V AC, and the maximum switch current is 1A (in an environment of ≤+60 ° C).

Environment: The working temperature range is divided into two types based on the model: standard (0 ° C to+60 ° C) and extended (-40 ° C to+70 ° C). The storage temperature can be as low as -40 ° C or as high as+85 ° C. The protection level is IP20.