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

（4） DIP switch configuration (selected by application scenario)

Application scenario 4-pin DIP switch setting (MS20/MS30 basic module) 3-pin DIP switch setting (MS20/MS30-... E...) verification standard

Normal scenario (no redundancy/coupling) 1 (RM): OFF; 2（Ring port）：OFF； 3（Stand-by）：OFF； 4 (configuration priority): OFF 1 (RM): OFF; 2（Ring port）：OFF； 3 (Stand by): Turn the OFF switch to the corresponding position and there is no half turn state

HIPER Ring Redundancy (Ring Network) 1 (RM): ON; 2 (Ring port): OFF/ON (according to ring port requirements); 3（Stand-by）：OFF； 4 (configuration priority): OFF 1 (RM): ON; 2（Ring port）：OFF/ON； 3 (Stand by): OFF ring port selection: OFF=module 1 port 1-2; ON=Module 2 Port 1-2

Redundant coupling (dual switch) 1 (RM): OFF; 2（Ring port）：OFF； 3（Stand-by）：ON； 4 (configuration priority): OFF 1 (RM): OFF; 2（Ring port）：OFF； 3 (Stand by): ON coupling port automatic allocation: MS20=module 1 port 3 (control)/4 (coupling); MS30=Module 2 Port 3/4

Software configuration priority 1-3: set as needed; 4 (configuration priority): ON 1-3: set as needed; Three key full ON=software configuration software configuration priority higher than DIP switch, suitable for flexible adjustment of scenarios

Wiring operation (power+signal+data)

（1） Power wiring (of utmost importance, avoid reverse connection)

Terminal type wiring steps verification standard safety precautions

4-pin terminal (MS20/MS30-... A.../C...) 1. Peel off the insulation layer of the wire (about 6mm); 2. P1 terminal: 1=+24V, 2=0V; P2 terminal: 1=+24V, 2=0V; 3-4=Signal contact 1. Positive and negative poles are not reversed; 2. The wire is tightly pressed without looseness; When using redundant power supply, P1/P2 should be grounded to the negative pole when connected to different DC power sources; Shielded wires are required for hazardous environments

6-pin terminal (MS20/MS30-... E...) 1.1=+24V (P1), 6=+24V (P2); 2=signal contact 1, 5=signal contact 2; 3-4=0V 1. There is no short circuit between the power supply and signal contacts; 2. The 0V terminal is connected together and well grounded. The 6-pin terminal integrates power and signal, and needs to be wired according to the pin definition

（2） Signal contact wiring (optional)

Step operation content verification standard purpose

The signal contact (3-4 pins) is connected to external monitoring equipment (such as PLC input). The contact is a potential free relay, which is in a normal closed state and an alarm when disconnected. It is used for remote monitoring equipment faults (such as power interruption, port link faults)

（3） Data cable wiring

Port type wiring steps verification standard remarks

Twisted pair port (RJ45/M12) 1. Peel off the insulation layer of the twisted pair (about 10mm) and press the wire according to T568B standard; 2. Insert the RJ45/M12 connector and tighten the nut. 1. The wire sequence is correct (orange white orange green white blue blue blue white green brown); 2. Wireless crosstalk, securely crimped PoE ports require 4 pairs of twisted pair cables to avoid using 2 pairs of cables

Fiber optic port (LC/ST/DSC) 1. Clean the fiber optic jumper end face (using specialized cleaning paper); 2. Insert the fiber optic port and tighten the nut (ST) or clamp (LC). 1. The end face should be free of stains/scratches; 2. After insertion, there should be no looseness, and gently pulling should not detach. It is forbidden to look directly at the fiber optic port (to avoid laser damage to the eyes)

AUI port (Sub-D 15 pin) is connected to the AUI cable according to the pin definition (1=shield, 2=output, 3=input, 6=GND, 13=12V). The shielding layer is well grounded and the pins are not connected incorrectly. It is only used for connecting 10Mbit/s devices and needs to be matched with an AUI transceiver

Final inspection before power on（ ✅  Select all options to power on)

Verification standard for inspection item operation content

1. Wiring review: 1. The positive and negative terminals of the power supply are not reversed; 2. The data cable sequence is correct and there are no short circuits; 3. The grounding is good. Use a multimeter to measure the power terminal: there is no short circuit between the positive and negative poles; Twisted pair cable has no abnormal conductivity

2. Verify the DIP switch position again according to the application scenario, and ensure that the switch is fully turned to the ON/OFF position without any looseness

3. Equipment status: 1. The shell is not damaged; 2. The port is not blocked by foreign objects; 3. Install the media module/SFP in place, tighten the module screws, and close the SFP latch

4. Environmental safety: 1. Hazardous environment: well ventilated and free of flammable and explosive gases; 2. Ordinary environment: no condensation, no water accumulation, hazardous environment must meet explosion-proof level requirements

Power on and functional verification (operated in sequence)

Steps, operation content, normal status, abnormal handling

1. Power on and connect the power supply (for redundant power supply, connect P1 first, then P2). 1. P1/P2 LED green light is always on; 2. RUN LED flashes green (system starts, about 60 seconds). If P1/P2 LED does not light up, check the power supply voltage/wiring