Hirschmann RS20/30/40 Switch Selection and PoE Deployment

Hirschmann RS20/RS30/RS40 Series Industrial Switches Multi Model Selection and PoE Deployment Guide

Introduction: A versatile family covering 100Mbps, PoE, and redundancy

In industrial network design, engineers often face the dilemma of requiring both economical 100Mbps access and gigabit uplink for the same project; It should be used in ordinary workshops and deployed in ships or explosion-proof areas; Some devices also require PoE power supply for IP cameras or wireless APs. The Hirschmann RS20/RS30/RS40 series (including RS22/RS32 PoE sub series) is designed for this complex requirement - covering almost all application scenarios of industrial Ethernet switches, from 4-port to 25 port, from pure 100Mbps to Gigabit Combo, from standard temperature to -40 ° C extended temperature width, from ordinary DIN rails to ship specific seismic installations. This article is based on the latest installation manual, systematically sorting out the model decoding, mechanical installation, redundant power supply wiring, PoE power supply unit selection, DIP switch ring network configuration, SFP selection, and explosion-proof compliance points of this series, helping engineers to accurately select and efficiently deploy among numerous variants.

Chapter 1 Product Family and Model Decoding

1.1 Four Basic Platforms

This series includes four core platforms:

RS20: Without gigabit ports, it provides 4-25 100Mbps ports and supports 2-4 uplink ports (optional fiber or twisted pair), making it the most basic access layer device.

RS22: PoE enhanced version of RS20, with the last 4 ports supporting IEEE 802.3af PoE (maximum 15.4W per port), suitable for powering terminal devices.

RS30: Provides 2 Gigabit uplink ports (SFP or RJ45 Combo), with 8-24 100Mbps ports, suitable for aggregation scenarios that require high bandwidth uplink.

RS32: The PoE version of RS30, with the last 4 ports having PoE functionality.

RS40: Full Gigabit device, providing 9 Gigabit ports (including 4 Combo SFP/RJ45), without 100Mbps ports, suitable for full Gigabit networks.

Model code key (see Table 2 and Table 5 in the manual):

Position 6-7: Number of 100Mbps ports (such as 08, 16, 24)

Position 8-9: Number of Gigabit Ports (00 or 02, RS40 is 09)

Positions 10-13: Upstream port media (T1=RJ45, M2=multimode DSC, S2=single-mode DSC, O6=SFP gigabit slot, Z6=SFP 100Mbps slot, etc.)

Position 14: Temperature Range (S=0~60 ° C, T=-40~70 ° C, E=-40~70 ° C with Three proof Coating)

Position 15: Voltage Range (D=9.6~60V DC or 18~30V AC, P=47~52V DC specifically for PoE)

Position 16: Certification (A, H, B, B includes ATEX/IECEx)

Selection examples (Table 3 and Table 4 in the manual):

RS20-0900MM2SDAP: 9 100Mbps ports, 3 multimode fiber uplink (MMM2), standard temperature, 9.6~60V DC, certified A, professional version software.

RS30-0802O6T1TDAE: 8 100Mbps+2 1G, port 1 is SFP slot, port 2 is RJ45, extended temperature, certified D, enhanced software.

RS40-0009CCCCED: 9 Gigabit, 4 Combo (SFP/RJ45), Extended Temperature Strip Coating, Certified A, Professional Edition.

Chapter 2 Mechanical Installation and Grounding

2.1 DIN rail installation and special requirements for ships

All models support 35mm DIN rail installation (compliant with DIN EN 60715), the steps are as follows:

Hang the upper hook of the device onto the upper edge of the guide rail.

Use a screwdriver to pull down the lock buckle and press the lower part of the device towards the guide rail.

Release the lock buckle and secure the device in place.

For ship applications (RS30-0802 series): Due to frequent hull vibrations, it is necessary to use the Open Rail Mounting Kit (Attachment 942 007-001 or 942 007-101) to install shock absorbers on both sides of the equipment and cooperate with standard DIN rail limiters to avoid resonance and equipment loosening. If space is limited, 942 007-101 (rail to rail installation) can be used.

2.2 Wall mounted installation (RS232/RS32)

RS22 and RS32 can be optionally equipped with wall mounting plates (Attachment 943 971-001 or 943 971-002) to vertically fix the equipment to the wall. During installation, it is necessary to maintain a heat dissipation gap of at least 10cm vertically and 2cm horizontally.

2.3 Functional Grounding

All models have an independent grounding screw in the lower left corner of the front panel, which must be connected to the system grounding bar using a copper wire with a cross-sectional area not less than the power wire diameter (at least 1.0mm ²/AWG16). The grounding wire must be connected first and disconnected last.

Chapter 3 Power Supply and PoE Power Supply Configuration

3.1 Power wiring for non PoE models (RS20/RS30/RS40)

6-pin terminal block pin definition (manual figure 20):

Pin 1:+24V (P1) - DC positive or AC phase line

Pin 2:0V - DC return line or AC neutral line

Pin 3, 4: Signal contact (normally closed)

Pin 5:0V

Pin 6:+24V (P2)

Voltage range: DC 9.6~60V (rated 12~24V), AC 18~30V (rated 24V). During redundant power supply, the two inputs are internally decoupled, and the higher voltage is automatically selected. If only a single channel is used, the device will report a power loss alarm, which can be blocked through management configuration.

External fuse: The positive pole (or phase line) needs to be connected to an external slow melting fuse, and the rated value is selected according to the voltage (page 64 of the manual).

3.2 PoE model (RS232/RS32) power supply architecture

RS22/RS32 itself does not directly accept wide voltage input, but provides 48V DC (adjustable to 54V) to the device through an external PoE power supply unit (RPS90/48V LV or RPS90/48V HV), while the last four ports are powered by the internal PoE circuit of the device.

RPS90/48V LV (low voltage type): Input 24-48V DC, output 48-54V DC/90W (below 60 ° C), suitable for vehicle or battery powered scenarios.

RPS90/48V HV (high voltage type): Input 90~265V AC or 48~320V DC, with the same output, suitable for direct connection to mains power or high voltage DC bus.

Wiring precautions:

LV type: 2-pin input terminal (+/-), wire length ≤ 2m.

HV type: 3-pin input terminals (protective ground, -,+). If the input DC>125V, an external fuse (Table 14 in the manual) is required, and the AC input needs to be grounded.

PoE output: RS232/RS32 receives PoE voltage through a 6-pin terminal (shared with the signal contact), with pin 1/4 being+and pin 2/3 being - (Table 15 in the manual). The length of the power supply line between the device and the PoE power supply must be less than 0.5m.

Ferrite accessories: For RS22 models with 16 ports and above (RS22-16/17/24/25), the accompanying ferrite magnetic ring needs to be wrapped around the PoE input cable (twice, near the device end) to meet EMC conduction emission requirements.

Chapter 4: DIP Switches and HIPER Ring Redundancy Configuration

The front panel of RS20/RS30/RS485/RS22/RS32 is equipped with a 2-pin DIP switch (Figure 19 in the manual), which is used to enable the ring network redundancy function at the hardware level to avoid software configuration errors causing ring network failure.

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

Switch 2 (Stand by): ON=Enable Stand by coupling function (for backup links between redundant ring networks).

Combinatorial Logic (Manual Table 6):

RM=OFF, Stand by=OFF: Ring network redundancy is turned off (normal mode).

RM=ON, Stand by=OFF: Enable the ring network manager, and the ring network ports are ports 1 and 2 of module 1.

RM=OFF, Stand by=ON: Enable the coupling manager, with port 3 as the control port and port 4 as the coupling port (used to connect two ring networks).

RM=ON, Stand by=ON: Force software configuration (DIP switch settings are overridden).

Factory default: Both switches are ON (i.e. software configuration takes priority), so if software configuration is not performed during the initial power on, the ring network function is actually not enabled. Engineers need to clarify the RM role based on the actual topology before powering on or through software settings.

Chapter 5 Port and SFP Selection

5.1 Port Type Overview

100Mbps twisted pair (RJ45): Supports 10/100BASE-TX, Auto negotiation, Auto crossover, Auto polarization, up to 100m in length.

100Mbps fiber optic (DSC/ST): multimode (M2/M4) or single-mode (S2/S4/E2/L2/G2), supports full/half duplex, default full duplex. The transmission distance is shown in Table 19 of the manual (the maximum distance for multimode is 5km, the maximum distance for single-mode is 30km, and the long distance can reach 176km).

Gigabit SFP slot (O6): used for RS30/RS32/RS40, supporting 100/1000M SFP modules (Hirschmann certified module required).

Gigabit twisted pair (RJ45): 10/100/1000BASE-T, Auto negotiation, up to 100m in length.

Combo port (CC, RS40 only): Each Combo port provides both SFP slots and RJ45 sockets, but they are mutually exclusive (RJ45 disabled when SFP is inserted).

SFP usage restrictions:

For the 4 upstream port models of RS30/RS32 (such as RS30-0802OOZZ), the top two SFP slots (OO) support gigabit or 100Mbps SFP, while the bottom two slots (ZZ) only support 100Mbps SFP.

When the ambient temperature is>60 ° C or<0 ° C, a wide temperature SFP module with the suffix "EEC" must be used (page 67 of the manual).

5.2 Fiber Optic Connection Rules

Absolute prohibition of mixing: LH (long-distance) only applies to LH, SM (single-mode) only applies to SM, MM (multi-mode) only applies to MM.

Bidirectional SFP (BIDI) needs to be used in pairs (Type A paired with Type B).

Chapter 6 LED Status Diagnosis

6.1 System level LED

P (power supply): green=dual power supply is normal; Yellow=single path only; Extinguish=no power or undervoltage.

FAULT (red): illuminated=signal contact disconnected (alarm); Extinguish=Normal.

RM (Ring Network Manager): Green=RM activated and redundant ports closed (ring network intact); Yellow=RM activated and redundant ports open (ring network broken but still working); Flashing=ring network configuration error (such as ring port not connected).

Stand by (green): On=Stand by coupling enabled.

6.2 Port LED

LS (link status, green): always on=link valid; Slow flashing (1 time/cycle)=Stand by state; Flash (3 times/cycle)=port disabled.

DA (data, yellow or green): blinking=data transmission and reception.

Note: The port LED color of the RS40 series is green/red, not green/yellow.

Chapter 7 Compliance with Explosion proof Zones (ATEX/IECEx/UKEX)

For models with ATEX/IECEx/UKEX certification (certification code B), they must comply with the following when used in Zone 2 explosive gas environments:

Temperature level:

RS20/RS30: T4 (S-type 0~60 ° C, T/E-type -40~70 ° C)

RS232/RS32: T4 (S-type 0~50 ° C, T/E-type -40~50 ° C) - PoE model has a lower temperature upper limit

RS40: T3 (-40~70 ° C) or T4 (-40~60 ° C), depending on the model

Shell protection: The equipment must be installed in cabinets with IP54 or higher (according to EN 60079-0).

Overvoltage limit: Transient overvoltage shall not exceed 119V (protection is required for over 40% of the rated voltage).

Live operation prohibited: All connectors (including SFP, DSC, RJ45) must be plugged and unplugged, and DIP switches must be switched in a power-off state.

USB port: USB devices must not be connected or disconnected in explosion-proof areas (emphasized in multiple parts of the manual), and USB is only used for temporary configuration in non hazardous areas.

Chapter 8 Initial Configuration and Security Baseline

8.1 IP Address Allocation

DHCP is enabled by default at the factory. If a static IP is required, it can be configured through the following methods:

V. 24 serial port (RJ119600bps, 8N1) - connect to VT100 terminal.

HiDiscovery protocol (via Industrial HiVision or HiDiscovery tool).

BOOTP/DHCP Option 82。

ACA22-USB configuration adapter (only for use in non explosion proof areas).

Default credentials (applicable to HiOS versions before 7.1/8.1):

Read only: user/public

Read and write: admin/private

Important: The default password must be changed immediately after the first login (at least 8 characters, including uppercase and lowercase letters, numbers, and special characters). If forgotten, it can be reset through System Monitor.

8.2 Other default parameters

Ring network redundancy: disabled (DIP switch default software configuration takes priority).

Port link status monitoring (signal contact): disabled.

100Mbps fiber optic: forcing 100M full duplex.

Other ports: Auto negotiation enabled.

RSTP: Enable.

Chapter 9 Environmental Monitoring and Maintenance

The relationship between internal temperature and ambient temperature: The internal temperature displayed by CLI/GUI is about 20 ° C higher than the ambient temperature (5cm away from the device). If the internal temperature exceeds the threshold (such as 83 ° C for RS20 standard type), a signal contact alarm may be triggered.

Relay maintenance: Signal relays are wear parts, and contact resistance should be checked regularly when the switching frequency is high.

Firmware update: Regularly visit the official website to download the latest software.

Ventilation hole inspection: Regularly clean according to the degree of dust on site.

Chapter 10 Disassembly and Disposal

Disassembly sequence (mandatory):

Disconnect all data cables.

Turn off the power supply voltage.

Disconnect the signal and power terminals.

Finally, disconnect the grounding wire (the grounding must be removed last).

DIN rail disassembly: Insert a screwdriver horizontally into the locking groove, pull down, and lift the bottom of the device away from the rail.