Siemens RS900G RUGGEDCOM Managed Ethernet Switch
Manufacturer: Siemens
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Part Number: RS900G
Condition：New with Original Package
Product Type: Industrial Ethernet Switches
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Siemens RS900G RUGGEDCOM Managed Ethernet Switch
The Siemens RS900G, also cataloged as the RS900G-HI-D-2SFP Industrial Ethernet Switch, operates as a dedicated hardware component for deterministic packet switching, network redundancy execution, and traffic management within RUGGEDCOM substation and industrial network platforms. Configured with 8 Fast Ethernet copper ports (10/100 Mbps RJ45) and 2 Gigabit fiber ports (1000BASE-X SFP/LC single-mode), this Layer 2 managed device routes Ethernet traffic across a non-blocking 20 Gbps switching backplane. It processes network security protocols and fail-safe relay signaling while drawing power from high-voltage or 24 VDC auxiliary power inputs.
Suffix Breakdown & Model Matrix
The RUGGEDCOM RS900G ordering matrix designates power supply ranges, mounting options, and optical transceiver configurations through specific catalog suffixes.
| Model Variant | Power Supply Rating | Mounting Type | Fiber Optical Interfaces |
|---|---|---|---|
| RS900G-HI-D-2SFP | HI Universal (85-265 VAC / 88-300 VDC) | DIN Rail Mount | Dual Gigabit SFP Slots (LC Transceivers) |
| RS900G-24-P-2SC | 24 VDC (18-36 VDC Range) | Panel Mount | Dual Gigabit Fixed Fiber (SC Connectors) |
| RS900G-48-D-2LC | 48 VDC (37-72 VDC Range) | DIN Rail Mount | Dual Gigabit Fixed Fiber (LC Connectors) |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RS900G (Part Number: RS900G-HI-D-2SFP) |
| Brand | Siemens |
| Origin | Canada |
| Weight | 1.2 kg (2.65 lbs) |
| Dimensions | 48 x 162 x 120 mm |
| Operating Temp | -40 deg C to +85 deg C |
| Power Consumption | 10 W maximum |
| Product Family | RUGGEDCOM Series |
| Switching Capacity | 20 Gbps non-blocking backplane |
| Forwarding Rate | 14.88 Mpps |
| MAC Address Table | 8192 entries |
| Copper Interfaces | 8 x 10/100BASE-TX RJ45 ports (CAT-5, up to 100 m) |
| Fiber Interfaces | 2 x Gigabit 1000BASE-X SFP/LC fiber optic ports |
| Isolation & Protection | Up to 4 kVAC / 5.5 kVDC isolation, IEC 61850-3 EMI immunity |
| Relay Output | Integrated failsafe alarm relay contact |
Profinet / EtherNet/IP Deterministic Networks
The Siemens RS900G manages deterministic automation traffic by implementing Quality of Service (QoS) IEEE 802.1p priority queuing alongside VLAN IEEE 802.1Q tagging across its internal backplane. Network control algorithms allocate strict priority paths for time-critical Profinet IO and EtherNet/IP implicit messaging packets, suppressing jitter and broadcast storms. High electromagnetic compatibility (EMC) isolation shielding prevents packet loss during high-voltage surge events, guaranteeing zero-packet-loss latency execution across the 8 Fast Ethernet and 2 Gigabit fiber trunking channels.
Frequently Asked Questions
Q: How does the internal failsafe alarm relay function during a supply voltage outage?
A: The failsafe relay utilizes a form-C dry contact that remains energized under normal operating states. When main power drops below operating limits or a designated port link fails, the relay de-energizes instantly to trigger external annunciator loops.
Q: What grounding procedure prevents noise coupling on the 8 Fast Ethernet RJ45 copper ports?
A: Standard CAT-5e shielded twisted-pair cables require metallic RJ45 connector shells that bond to the switch chassis ground frame. Connect a dedicated 14 AWG copper grounding strap from the chassis earth stud directly to the local panel ground bus bar.
Q: Can optical SFP transceivers be hot-swapped while the Ethernet switch remains powered?
A: The two Gigabit SFP transceiver slots support hot-swapping under live power conditions. Removing or inserting an SFP module updates internal port status registers without interrupting data forwarding across the remaining active copper ports.
Field Installation Guidelines
Mount the switch onto a standard 35 mm DIN rail by snapping the rear latch securely over the rail lip. Maintain a minimum top and bottom clearance of 50 mm inside the enclosure to enable natural convective cooling across the fanless aluminum heat sink. Connect the primary power conductors to the heavy-duty screw terminal block, ensuring correct polarity alignment for DC inputs or proper ground connection for HI universal AC/DC options. Terminate all fiber optic LC connectors using clean end-faces, keeping dust caps fitted on unused SFP optical ports to prevent optical interface contamination.