Hirschmann (Belden) SPIDER-PL-20-04T1S29999TY9HHHH Ethernet DIN-rail switch
Hirschmann (Belden) SPIDER-PL-20-04T1S29999TY9HHHH (Order Code: SPL20-4TX/1FX-SM-EEC, Part Number: 942141026) is an unmanaged, entry-level industrial Ethernet DIN-rail switch from the SPIDER III Premium Line (PL) series.
Designed for harsh, space-constrained industrial automation environments, it features 4 copper RJ45 Fast Ethernet ports and 1 Single-Mode fiber optic port with SC connections. The Premium Line offers advanced configurability via a built-in USB interface, a robust metal enclosure, and extreme thermal resilience.
1. Product Introduction / Overview
Manufacturer: Hirschmann / Belden
Product Family: SPIDER III Premium Line (PL)
Model Code: SPIDER-PL-20-04T1S29999TY9HHHH
Order / Part Code: 942141026 / SPL20-4TX/1FX-SM-EEC
Device Type: Unmanaged Industrial Ethernet Rail Switch
Switching Mode: Store and Forward
Target Applications: Factory automation, energy/utility sub-stations, traffic systems, process control, and edge-level field networks requiring fiber-optic backhaul up to 30 km.
2. Technical Parameter List
| Category | Specification / Parameter | Details |
| Port Configuration | Copper Ports | 4 × 10/100BASE-TX, RJ45 sockets (Auto-crossing, Auto-negotiation, Auto-polarity) |
| Fiber Port | 1 × 100BASE-FX, Single-Mode (SM 9/125 µm), SC duplex socket | |
| Fiber Transmission Distance | 0 to 30 km (Link Budget at 1300 nm: 0 – 16 dB) | |
| Interfaces & Management | Configuration Port | 1 × USB interface (for parameter setup) |
| Terminal Block | 1 × 6-pin plug-in terminal block (power & alarm contact) | |
| Power Requirements | Operating Voltage | 12/24 V DC (9.6 V DC – 32 V DC), Redundant input |
| Current Consumption | Max. 180 mA @ 24 V DC | |
| Power Consumption | Max. 4.3 W (Heat Dissipation: 14.7 BTU/h) | |
| Mechanical Build | Dimensions (W × H × D) | 39 mm × 135 mm × 117 mm (without terminal block) |
| Weight | ~430 g | |
| Housing Material | Heavy-duty metal (IP40 protection class) | |
| Mounting | Standard 35 mm DIN Rail | |
| Performance & Reliability | MTBF | ~1,149,795 Hours (Telcordia standards) |
| Network Topologies | Line, Star, or tree topologies (Any cascadibility) | |
| Certifications | Safety & EMC | CE, FCC CFR47 Part 15 Class A, cUL 61010-1/61010-2-201, EN 61131 |
3. Product Features & Core Advantages
Plug-and-Play Simplicity: Instant network operational readiness without requiring complex network configuration software.
Long-Distance Single-Mode Fiber: Connects distant field nodes across up to 30 km with immunity to electrical interference and noise.
USB Setup & Customization: Unlike standard unmanaged switches, the SPIDER III Premium Line includes a USB port to enable/disable features like Jumbo Frames, Quality of Service (QoS) prioritization, broadcast storm protection, and disabling unused ports for improved security.
Redundant Power Input: Dual DC power terminals (9.6 to 32 V DC) ensure zero downtime in the event of a primary power supply failure.
Energy-Efficient Ethernet (IEEE 802.3az): Dynamically lowers power consumption based on network traffic load.
Industrial Compliance: Suitable for PROFINET Conformance Class A applications.
4. Model Classification & Naming Rule Breakdown
The model designation SPIDER-PL-20-04T1S29999TY9HHHH follows Hirschmann’s structured configurator key:
SPIDER – PL – 20 – 04 T1 – S2 – 99 – 99 – T – Y – 9 – HHHH
│ │ │ │ │ │ │ │ │ │ │ └── Hardware/Firmware Code
│ │ │ │ │ │ │ │ │ │ └────── Standard Approvals (CE, FCC, cUL)
│ │ │ │ │ │ │ │ │ └────────── Enclosure: IP40 Metal Housing
│ │ │ │ │ │ │ │ └──────────── Temp Range: Extended (-40°C to +70°C)
│ │ │ │ │ │ └────┴──────────────── Option flags / Standard configuration
│ │ │ │ │ └────────────────────────── Fiber Port: 1x 100BASE-FX Single-Mode SC
│ │ │ │ └────────────────────────────── Connector: RJ45 / SC
│ │ │ └───────────────────────────────── TX Ports: 4x 10/100 Mbit/s Copper
│ │ └────────────────────────────────────── Bandwidth: Fast Ethernet (10/100 Mbps)
│ └─────────────────────────────────────────── Line: Premium Line (PL)
└─────────────────────────────────────────────────── Family: SPIDER III Unmanaged Switch
5. Environmental Tolerance Conditions
| Environmental Factor | Operating / Tolerance Level | Standard / Test Method |
| Operating Temperature | -40 °C to +70 °C (EEC Extended Range) | — |
| Storage / Transport Temp | -40 °C to +85 °C | — |
| Relative Humidity | 10% to 95% (non-condensing) | — |
| Vibration Resistance | 3.5 mm @ 5–8.4 Hz; 1 g @ 8.4–150 Hz | IEC 60068-2-6 |
| Shock Resistance | 15 g (11 ms duration, 18 shocks) | IEC 60068-2-27 |
| Electrostatic Discharge (ESD) | 8 kV contact discharge; 15 kV air discharge | EN 61000-4-2 |
| EMC Radiated Immunity | 20 V/m (80 MHz – 3000 MHz) | EN 61000-4-3 |
| Electrical Fast Transient (Burst) | 4 kV power line; 4 kV data line | EN 61000-4-4 |
| Surge Voltage | Power line: 2 kV line/earth, 1 kV line/line; Data: 4 kV | EN 61000-4-5 |
6. Installation Method
Mechanical Mounting (35 mm DIN Rail)
Positioning: Hook the top groove of the rear DIN rail clip onto the upper lip of the 35 mm DIN rail.
Snapping In: Press the bottom rear of the unit toward the rail until the spring latch snaps firmly into place.
Disassembly: Pull down the bottom locking latch using a flathead screwdriver and lift the bottom of the switch away from the rail.
[Top Hook] ──► ┌──────────┐ ◄─ Metal Housing (IP40)
│ SPIDER │
│ III │
[DIN Rail] ──► ╞══════════╡
│ PL-20 │
[Bottom Clip] ──► └────┬─────┘
▼ (Pull down to release)
Electrical Wiring & Grounding
Functional Earth Grounding: Connect a protective earth (PE) ground wire to the grounding screw located on the housing chassis prior to applying power.
Power Supply Connection: Wire a 12 V DC to 24 V DC SELV/Class 2 power source (9.6–32 V DC) to the 6-pin terminal block. Connect primary power to $+V1/ -V1$ and optional redundant power to $+V2/ -V2$.
7. Operating Instructions
Port Connections & Status
Copper Ports (1–4): Connect Cat5e/Cat6 STP/UTP ethernet cables into ports 1–4. The Auto-MDI/MDI-X feature automatically detects straight-through or crossover wiring.
Single-Mode Fiber Port (Port 5): Remove dust caps from the SC fiber connector. Insert 9/125 µm Single-Mode fiber cables into the SC transceiver port. Ensure $Tx \rightarrow Rx$ and $Rx \rightarrow Tx$ alignment.
LED Diagnostics Guide
| LED Indicator | Color / State | Description |
| Power ($P1 / P2$) | Green | Supply voltage is connected and operating within valid range ($> 9.6\text{ V DC}$). |
| Off | Supply voltage is missing or below operating threshold. | |
| Link/Data (Ports 1–5) | Green (Solid) | Active Ethernet link established. |
| Green (Flashing) | Port is actively transmitting/receiving data packets. | |
| Off | No physical link detected (cable disconnected or device off). |
8. Guidelines to Ensure Google Web Indexing
If publishing this product datasheet or webpage online, follow these SEO best practices to ensure Google indexes the page quickly:
Title Tag & H1 Structuring:
Title Tag: HIRSCHMANN SPIDER-PL-20-04T1S29999TY9HHHH Datasheet & Specs
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JSON
{
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“name”: “Hirschmann SPIDER-PL-20-04T1S29999TY9HHHH”,
“image”: “https://example.com/images/spider-pl-20.jpg”,
“description”: “Unmanaged Industrial Ethernet Switch with 4 x 10/100Base-TX ports and 1 x 100Base-FX Single-Mode Fiber port.”,
“mpn”: “942141026”,
“brand”: {
“@type”: “Brand”,
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