フエニックス・コンタクト 2891002 産業用イーサネットスイッチ

Order-No.: 2891002；Full Designation: FL SWITCH SFNB 8TX；タイプ: 管理されていない 産業用イーサネットスイッチ

⚠️ Status: 生産終了 (EOL). Discontinued by manufacturer; only stock or replacement models are available.

コア仕様

アイテム	パラメータ
ポート	8 ×RJ45, 10/100Base‑TX (10/100 Mbps auto‑negotiation)
モードの切り替え	Store‑and‑Forward, IEEE 802.3, MAC address table: 2K
Auto‑functions	Auto‑Negotiation, Auto‑MDI/X (auto‑crossover; no crossover cable required)
電源	9‑32 VDC, nominal 24 VDC; typical 140 mA @24 VDC, 最大. 380 mA @9 VDC
取り付け	DIN‑rail snap‑in mounting, aluminum housing, 保護等級IP20
寸法	W 50 mm × H 110 mm × D 70 mm
温度範囲	オペレーティング: ‑10 ℃ ~ +60 ℃; ストレージ: ‑20 ℃ ~ +85 ℃; Humidity 5‑95 %RH, 結露なし
LEDインジケーター	Power supply US, Link/ACT and speed LED per port
マックス. Cable Length per Segment	100 m (Category 5 twisted‑pair cable)
承認	CE, UL/cULus, EAC, KC; EMC Class A (産業環境)

モデルコードのデコード

FL SWITCH: フエニックス・コンタクト industrial switch series

SFNB: 管理されていない, compact metal housing, DINレールマウント

8: 8 copper ports

TX: Copper twisted-pair RJ45 interface

Scope of Delivery

Main unit FL SWITCH SFNB 8TX ×1
Integrated DIN-rail snap clip (built-into housing)
Green pluggable power terminal block (supplied with unit)
Abbreviated printed operating manual

❗ Not included: Power supply unit, Ethernet cables — must be ordered separately.

典型的なアプリケーションシナリオ

Industrial field-bus network expansion for PLCs, servo drives and frequency converters

8-node industrial Ethernet star / line topologies inside control cabinets

工作機械, 包装機械, 水処理, material-handling equipment

トラブルシューティングガイド

電源LEDがオフ: Check DC 9-32 VDC supply polarity, terminal tightness and input voltage drop.
Port LED off: Damaged / mis-wired cable; peer device unpowered; abnormal port negotiation (speed cannot be forced on this unit).
Packet loss / poor throughput: Verify cable quality; use shielded industrial cables; ensure no condensation and temperature stays within -10~60 ℃.

Hard Constraints / 禁止されている操作:

Not for outdoor direct exposure; IP20 for cabinet-only installation.

Do not apply supply voltage exceeding 32 VDC.

No VLAN, QoS or ring-management functions; pure plug-and-play unmanaged switch.

交換の推奨事項 (OEM-Suggested)

Direct functional replacement: FL SWITCH 1008N (2701473), 8-ポート 10/100 unmanaged DIN-rail switch. Pin-compatible and dimension-compatible; performance improved as drop-in substitute for obsolete 2891002.
国内代替品: Advantech EKI-2528, MOXA EDS-208A-T, 8-port unmanaged industrial Ethernet switches.

フエニックス・コンタクト 2891002 (FL SWITCH SFNB 8TX) パフォーマンス

Per-RJ45 port speed: 10 Mbps / 100 Mbps auto-negotiation (10/100Base-TX), 最大. 100 Mbit/s per port.
Overall switching capacity:

Switching bandwidth: 1.6 Gbps (8 ports full-duplex: 8 × 100 Mbit/s ×2)

MAC address table size: 2048 MAC addresses

Forwarding rate: 1.19 Mpps

注記: This is a Fast-Ethernet (100 M) industrial switch; ギガビット (1000 Mbps) is not supported. Ports auto-negotiate 10 M or 100 M with peer devices; Auto-MDI/X auto-detects straight-through / crossover cables.

フエニックス・コンタクト 2891002 (FL SWITCH SFNB 8TX) 機械的寸法

Housing Dimensions (excluding protruding terminals)

アイテム	価値
幅 (W)	50 mm (horizontal cabinet dimension for DIN‑rail mounting)
身長 (H)	110 mm (vertical dimension)
深さ (D)	70 mm (depth measured from DIN‑rail mounting face forward)

Additional Mounting Notes

Power terminal protrusion: The upper green power plug extends forward approx. 8-10 mm. Reserve extra cabinet depth; recommended minimum installed depth ≥80 mm for cabinet layout.
重さ: 約. 400 g (0.4 kg), aluminum housing.
取り付け: Standard DIN-35 rail snap-in; front-panel cut-out mounting is not supported.
侵入保護: IP20; for control-cabinet installation only.

Cabinet Layout Clearance Recommendations

Left-right: Unit width 50 mm; maintain ≥10 mm clearance on both sides for cooling.

Top-bottom: Maintain ≥20 mm clearance above and below for ventilation.

深さ: With terminal protrusion considered, cabinet inner depth ≥80 mm.

Comparison with replacement FL SWITCH 1008N (2701473): identical 50 mm width, direct DIN-rail swap-out possible.

フエニックス・コンタクト 2891002 (FL SWITCH SFNB 8TX) VLAN Capability

❌ 802.1Q tagged VLAN is not supported. No web / serial configuration interface; purely unmanaged switch.

Key Details

Zero configurable features: No VLAN segmentation, port isolation, QoS, IGMP Snooping or ring redundancy. All ports belong to one single broadcast domain. Incoming VLAN-tagged frames are forwarded transparently without tag processing; tag filtering cannot be performed.
Related PNE-suffixed model (Order-No. 1071800, FL SWITCH SFNB 8TX-PNE): only hardware-prioritized PROFINET / EtherNet/IP traffic; custom VLAN configuration remains unavailable.

Sourcing Guidance

If VLAN functionality is required: select Smart Managed / Managed switches, 例えば. Phoenix Contact FL SWITCH SMCS 8TX-PN (2989103), supporting 802.1Q VLAN, QoS and IGMP Snooping.

Hardware-only replacement without VLAN needs: use FL SWITCH 1008N (2701473) — also unmanaged without VLAN support, mechanically drop-in compatible.

⚠️ Hard constraint: Do not deploy this switch in architectures requiring VLAN segmentation; broadcast storms will propagate to every port.

フエニックス・コンタクト 2891002 (FL SWITCH SFNB 8TX) Stacking Capability

❌ Hardware stacking is not supported.

This is an unmanaged switch. No dedicated stacking ports, no stacking ASIC, no stacking protocol. Multiple units cannot be logically grouped as one single logical device; no unified management IP; no stacking cables are applicable.

Definition of stacking: Multiple physical switches combined logically into one managed entity via dedicated ports / プロトコル. This device cannot perform stacking.

✅ Cascading over regular RJ45 ports is allowed

複数 2891002 units may be interconnected via standard Ethernet cables to expand port count for star or line topologies.

Each unit remains fully independent; all ports share one broadcast domain.

One RJ45 data port is consumed for each cascading link. There is no firmware-enforced cascading depth limit, but industrial practice recommends maximum 4 cascaded hops to limit latency and broadcast-storm risk.

Use shielded twisted-pair industrial cables, 最大. 100 m per segment. Auto-MDI/X accepts straight-through or crossover cables.