Hirschmann MICE MS20/MS30 Installation and DIP Configuration

Switch 1 (RM): ON=Enable Redundancy Manager (this device acts as a ring network manager); OFF=disabled.

Switch 2 (Ring Port): OFF=The ring network ports are ports 1 and 2 of module 1; ON=The ring network ports are port 1 of module 1 and port 1 of module 2 (MS20) or port 1 and 2 of module 2 (MS30).

Switch 3 (Stand by): ON=Enable Stand by coupling function (for backup links between redundant ring networks); OFF=Normal mode.

Switch 4 (Configuration): OFF=Software configuration takes priority over DIP switch (other switch settings are invalid at this time); ON=DIP switch setting takes effect.

Combination logic (Table 8): When both RM and Stand by are OFF, ring network redundancy is turned off; When RM=ON and Stand by=OFF, only the ring network manager is enabled; When RM=OFF and Stand by=ON, enable the coupling manager (control port is module 1/port 3, coupling port is module 1/port 4); When both are ON, disable the ring network redundancy (dual ON is disabled mode).

3.2 3-pin DIP switch (suitable for 6-pin terminal models with voltage range E)

This model does not have Switch 4 (configuration selection), and the default DIP switch settings always take effect. The three switches correspond to RM, Ring Port, and Stand by, and have the same function as the 4-pin switch. Note: If all three switches are turned on, software configuration will be forcibly used (i.e. software settings override DIP).

3.3 DIP switch for media module MM20-A8A8

The AUI media module also has a 3-pin DIP for setting up SQE (signal quality error) testing and DTE power monitoring functions, which need to be adjusted according to the requirements of the connected transceiver.

Engineering point: In the design of the ring network, it is necessary to ensure that only one device in the ring network has enabled the RM function (i.e. "Ring Manager"), otherwise the ring network cannot function properly. Hardware settings through DIP switches can avoid multi master station conflicts caused by software configuration errors.

Chapter 4 Connection of Power and Signal Terminals

4.1 Terminal Types and Pin Definitions

MS20/MS30 offers two terminal forms:

4-pin terminal (voltage range A or C): Two independent 4-pin terminal blocks, each containing power+(P1/P2), power - (0V), and a pair of signal relay contacts (Relay 1/Relay 2). Pin 1=+24V, Pin 2=0V, Pin 3 and 4=Relay (normally open/normally closed configurable).

6-pin terminal (voltage range E): A single 6-pin terminal block, pin 1=+24V (P1), pin 2=relay 1, pin 3=0V, pin 4=0V, pin 5=relay 2, pin 6=+24V (P2). This design integrates two power sources and two signal contacts together.

4.2 Redundant power supply and signal monitoring

Power supply: Supports two independent inputs (P1 and P2), with internal diode decoupling, automatically selecting the higher voltage for power supply. If only a single channel is used, the device will report a power failure, which can be avoided by configuring shielding or simultaneously connecting two channels.

Signal contact: Two relay contacts (Relay 1 and Relay 2) can be independently configured to monitor events such as power loss, link interruption, ring network failure, temperature overrun, etc. The contact is normally closed and disconnected in case of malfunction. Attention: The contact capacity is 1A/60V DC or 0.5A/30V AC (resistive load).

4.3 External power supply for PoE media module

The MM22-T1T1T1T1 PoE module requires an additional 48V DC power supply (such as RPS 60/48V EEC) to be connected and powered through a 3-pin terminal (pin 1=+48V, pin 3=0V). This power supply must meet the insulation requirements of IEEE 802.3af (2250V DC withstand voltage) and have an output power of<100W. Note that this power supply does not meet the GL marine conduction emission requirements. If it needs to be met, other compliant power supplies must be selected.

Chapter 5 Display Status Customization and LED Diagnosis

5.1 "SELECT" button for basic modules

The front panel of the basic module is equipped with a "SELECT" button, which is used to switch the display content of the media module port LED. Each press (about 2 seconds), the LED display mode switches in a loop, and the current mode is indicated by the "Display Status LED" on the basic module. Automatically return to "L/D" mode after about 20 seconds of inactivity.

Available display modes (see page 41 of the manual):

L/D: Display link status (green constant=active, flashing=standby/disabled) and data activity (yellow flashing).

FDX: Display full duplex/half duplex status (green=full duplex).

1000: Display transmission speed (10/100/1000 Mbit/s).

AN: Display whether automatic negotiation is enabled.

RING: Highlight the port assigned to HIPER Ring.

STBY: Display the ports (control port/coupling port) coupled by Stand by.

TP/FO: Distinguish between twisted pair ports and fiber ports.

PoE: Display PoE power status (green=powered, yellow=searching for PD, off=faulty or not enabled).

TEST: All LED flicker tests.

This feature greatly facilitates on-site troubleshooting and port role confirmation, allowing for intuitive access to port status information without logging into the management interface.