Hirschmann RS20-1600M2M2SDAUHC Ethernet DIN rail switch
Product Overview
The Hirschmann RS20-1600M2M2SDAUHC is a 16-port Unmanaged Industrial Fast Ethernet DIN-Rail Switch from Belden’s OpenRail RS20 family.
It is configured with 14 × 10/100Base-TX RJ45 copper ports and 2 × 100Base-FX Multi-Mode (MM) SC optical fiber uplink ports, providing long-distance noise-immune network extensions (up to 5 km) for large control cabinet layouts.
Designed for cost-sensitive, plug-and-play field applications where network management is unnecessary, it retains full industrial-grade hardware reliability—including redundant power inputs, a signal contact fault relay, and standard industrial certifications.
Technical Specifications Table
| Parameter | Specification Details |
| Product Model | RS20-1600M2M2SDAUHC |
| Switch Type | Unmanaged Store-and-Forward Fast Ethernet Switch |
| Total Port Count | 16 Ports (14 × Copper + 2 × Multi-Mode Fiber) |
| Copper Ports | 14 × RJ45 (10/100 Mbit/s, Auto-crossing, Auto-negotiation, Auto-polarity) |
| Fiber Ports (Uplinks) | 2 × 100Base-FX Multi-Mode SC connectors (1300 nm wavelength, 0 to 5 km range) |
| Operating Voltage | Dual Redundant 12/24/48 V DC (9.6–60 V DC) & 24 V AC (18–30 V AC) |
| Power Consumption | ~11.8 W |
| Signal Contact / Alarm Relay | Integrated 2-pin plug-in terminal block output (triggerable on loss of power input or link failure) |
| Housing / Enclosure | IP20 rated compact plastic housing |
| Dimensions (W × H × D) | 110 mm × 131 mm × 111 mm |
| Weight | ~600 g |
Environmental Tolerance Conditions
| Condition | Rating / Compliance Standard |
| Operating Temperature | $0^\circ\text{C}$ to $+60^\circ\text{C}$ ($32^\circ\text{F}$ to $140^\circ\text{F}$) |
| Storage / Transport Temp | $-40^\circ\text{C}$ to $+85^\circ\text{C}$ |
| Relative Humidity | 10% to 95% (non-condensing) |
| Vibration & Shock | IEC 60068-2-6 (Vibration), IEC 60068-2-27 (Shock) |
| Safety & HazLoc Approvals | CE, cUL508 (Industrial Control), ISA-12.12.01 Class 1 Division 2 (Hazardous Locations) |
Storage Conditions
Temperature: Store in an ambient temperature range of $-40^\circ\text{C}$ to $+85^\circ\text{C}$.
Humidity: Keep relative humidity between 10% and 95% non-condensing.
Environment: Keep indoors within dust-free, non-corrosive environments inside antistatic protective packaging until final installation.
Operating Instructions
DIN-Rail Mounting: Snap the switch onto a standard 35 mm DIN rail (EN 50022). Ensure the top retention latch locks into place.
Power & Fault Relay Wiring:
Wire dual redundant DC power feeds (9.6–60 V DC) or a single 24 V AC feed into the removable terminal block.
Wire the fault relay signal contact to a PLC input or indicator lamp to catch power/link failure events.
Earth Grounding: Connect a functional earth grounding wire to the screw terminal on the switch base for proper EMC compliance.
RS20-1600M2M2SDAUHC
Network Cabling:
Insert standard Cat5e/Cat6 Ethernet cables into RJ45 ports 3 to 16.
Connect 50/125 $\mu$m or 62.5/125 $\mu$m Multi-Mode optical fiber cables with SC connectors to fiber ports 1 and 2.
Zero Configuration: As an unmanaged switch, it is completely plug-and-play. Packets will automatically begin store-and-forward switching upon cable connection.
Fault Diagnosis
Front Panel LED Diagnostics:
Power LED (P1 / P2) Off: Verify input power supply connections, check for proper polarity, and ensure voltage is within the 9.6–60 V DC range.
Fault / Alarm LED (Red): Triggers when one of the redundant power feeds loses voltage or a specified port link drops.
Port Link/Data LED Off:
Copper (RJ45): Inspect patch cable, verify connected device interface is powered on and running at 10/100 Mbps.
Fiber (SC): Inspect optical fiber connectors for dirt or damage, verify distance does not exceed 5 km, and check for correct TX-to-RX fiber polarity crossover.
Related Models in the RS20 Unmanaged / Managed Series
| Model Code | Configuration Differences |
| RS20-1600M2M2SDAU | Identical 14 × RJ45 + 2 × Multi-Mode SC unmanaged base version. |
| RS20-1600S2S2SDAUHC | 16-port unmanaged switch with Single-Mode SC fiber uplinks (up to 32.5 km). |
| RS20-1600T1T1SDAUHC | 16-port unmanaged switch with All Copper RJ45 ports (16 × RJ45). |
| RS20-1600M2M2SDAE | Managed version of the 16-port switch (14 × RJ45 + 2 × Multi-Mode SC) with software features (VLAN, SNMP, RSTP). |
| RS20-0800M2M2SDAUHC | Compact 8-port unmanaged variant (6 × RJ45 + 2 × Multi-Mode SC). |