Description
Hard-Numbers: Technical Specifications
- Standards: IEEE 802.3, 802.3u, 802.3x, IEEE 1588 PTP
- Copper Ports: 16× RJ45, 10/100 Mbps, auto-negotiation, HP-MDIX
- Fiber Port: 1× LC, 100Base-FX, multi-mode (850 nm)
- Buffer Memory: 256 KB
- MAC Table: 4K addresses
- Operating Temp: -40°C to +70°C
- Power Input: 24–28 VDC (dual redundant, diode-OR’d)
- Power Draw: 8.5 W typical, 12 W max
- Isolation: 1500 Vrms port-to-backplane
- Mounting: DIN-rail (BVP1/BVP4 clips) or panel-mount
- Dimensions: 162 × 115 × 72 mm
- Weight: 0.9 kg
- Environmental: G3 conformal coating, Class 1 Div 2 / Zone 2 rated
IS420ESWBH1A.
The Real-World Problem It Solves
Local I/O racks need high port count and long-distance fiber runs to controllers. This unit combines 16 copper ports with one fiber uplink to eliminate daisy-chaining and reduce latency.
Where you’ll typically find it:
- Remote I/O panels in gas/steam turbine power plants
- Offshore control modules with fiber runs to main control rooms
- Refinery cogeneration systems with mixed copper/fiber topologies
Bottom line: It unifies local I/O and long-distance fiber in one rugged, low-power switch.
Hardware Architecture & Under-the-Hood Logic
Unmanaged Layer 2 switch with hardware-based forwarding; no CPU/firmware dependency. Convection-cooled, no fans. Fiber and copper paths electrically isolated.
- Frames ingested from 16 copper ports or 1 fiber uplink.
- Hardware MAC lookup forwards packets with <1 ms latency.
- 802.3x flow control prevents buffer overflow during traffic bursts.
- Fiber port auto-negotiates link; signals fault via LED on loss of signal.
- Bi-color LEDs indicate link, speed, activity, and duplex status.
Field Service Pitfalls: What Rookies Get Wrong
Fiber Port ContaminationRookies install fiber without cleaning LC connectors. Dust causes signal loss, intermittent uplink drops, and turbine trips.
- Field Rule: Clean LC ferrules with lint-free wipes and optical cleaner before insertion.
Redundant Power MiswiringConnecting both power inputs to the same supply eliminates redundancy. Entire switch fails on single supply outage.
- Quick Fix: Feed TB1 and TB2 from separate 24 VDC sources; diode-OR ensures true redundancy.
Unused Port Broadcast StormsLeaving unused copper ports active creates broadcast storms. IONet latency spikes lock control loops.
- Field Rule: Disable all unused ports via ToolboxST or DIP switch; enable storm filtering.
IS420ESWBH1A.
Commercial Availability & Pricing Note
Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.
