Hirschmann RSB20 Switch Deployment and Redundant Configuration

Communication: Does not directly support AC power supply (unlike RS20 Basic), only allows DC input.

Overcurrent protection: Built in non replaceable fuse that only blows in case of internal failure.

Insulation voltage: The insulation voltage between the power supply and the casing is 800V DC, but the protective component limits the insulation to 45V DC (1mA).

Important reminder: If only a single power supply is used, the device will continue to report power failure alarms. The solution is: ① Two channels of power supply simultaneously; ② Disable power alarm monitoring through management software.

3.3 Characteristics of "FAULT" signal contact points

Electrical limits: Switching current maximum 0.5A AC/0.3A DC (resistive load), voltage maximum 60V DC or 30V AC.

Trigger conditions: including power loss, equipment failure, port link disconnection (requiring configuration activation), loss of ring network redundancy, HIPER Ring configuration error, etc.

Explosion proof scenario: When used in hazardous areas, non flammable field wiring parameters (Vmax=30V, Imax=90mA, Ci=5pF, Li=0.2 μ H) in the control drawing (document number 000147906DNR) must be followed.

Chapter 4 SFP Module Installation and Fiber Optic Connection

4.1 SFP slot operation (0900ZZZ6 variant only)

This variant provides 3 SFP slots and supports 100Mbit/s fiber optic transceivers. Installation steps:

Remove the protective dust cap from the slot.

Push the SFP module (with the latch in the closed position) into the slot until it locks with a clicking sound.

Only Hirschmann certified SFP modules (see attached list, such as M-FAST SFP-MM/LC, etc.) can be used.

Attention: SFP modules are static sensitive devices, and anti-static measures should be taken before installation; When pulling it out, you need to first open the lock buckle and then pull it out.

4.2 Fiber optic port (DSC connector)

For fixed fiber variants (M2, S2, VV, etc.), use DSC duplex connectors. The transmission distance and attenuation parameters are as follows (with a system margin of 3dB):

Multimode (50/125 µ m): Typical distance 0-5km, attenuation ≤ 1.0dB/km.

Multi mode (62.5/125 µ m): typical 0-4km, attenuation ≤ 1.0dB/km.

Single mode (9/125 µ m): typical 0-30km, attenuation ≤ 0.4dB/km.

Mandatory rule: The LH port can only be connected to LH, SM to SM, and MM to MM. Mixing can cause link failure or damage to the transceiver.

4.3 Twisted pair port (RJ45)

Supports 10/100BASE-T (X), Auto negotiation, Auto polarity, Auto rolling (MDI/MDI-X adaptive), and is fully enabled by factory default.

Recommend using Cat5e or higher shielded twisted pair cables, with a maximum length of 100 meters.

The pin definition adopts MDI-X mode (1-RD+, 2-RD -, 3-TD+, 6-TD -), but the automatic crossover function can adapt to direct or crossover cables.

Chapter 5 LED Status Indication and Startup Diagnosis

5.1 System level LEDs (P, Stand by, FAULT, RM)

RSB20 has added Stand by and RM (Ring Manager) indicator lights to enhance redundant monitoring:

P (power supply): Green dual channel normal; Yellow single channel power supply; Turn off no power supply.

Stand by: Green constant light indicates that the standby mode is enabled (for redundant switching).

FAULT: The red constant light indicates that the signal contact is disconnected (alarm state); Extinguish normally.

RM (Ring Network Manager):

Green constantly on: RM activated and redundant ports closed (main ring working normally).

Green flashing: HIPER Ring configuration error (such as incorrect ring connection).

Yellow constantly on: RM is activated, but redundant ports are open (indicating that the ring network has been disconnected and is in standby mode).

Off: RM is not enabled.

5.2 Port LED (LS/DA)

Each port is equipped with dual color LED:

Green (Link Status): Always on, valid connection; The slow flashing (once/cycle) port is in Stand by mode; The flash (3 times/cycle) port is managed to be closed.

Yellow (Data Activity): Blinking indicates data transmission and reception.

Startup process: Self check for about 60 seconds after power on, during which the LED flashes sequentially. When the P light stabilizes and turns green, it indicates that the system is ready.

Chapter 6 Initial Configuration and IP Address Allocation

6.1 IP Acquisition Method

Similar to RS20 Basic, RSB20 supports:

V. 24 serial port (RJ119600bps, 8N1) local configuration

HiDiscovery Protocol (Windows Tools)

BOOTP/DHCP (enabled by default, automatically obtained)

DHCP Option 82 (Relay Agent Information)

AutoConfiguration Adapter ACA 11 (Batch Deployment)

Factory default certificate:

Read only user: user/public

Read and write administrator: admin/private

6.2 Default Operating Parameters

All TP ports: Auto negotiation enabled, link status monitoring (for signal contacts) disabled by default.

Fiber port: Forced 100M full duplex.

RM function: disabled by default.

RSTP (Fast Spanning Tree): enabled by default.

HIPER Ring: Not activated by default.

6.3 V.24 serial port connection

Similar to RS20 Basic, the RJ11 socket is non isolated and can be connected to a VT100 terminal or ACA 11 adapter to access the command line (CLI) and system monitor. The terminal cable needs to be ordered separately (No. 943 301-001).