The Contemporary Controls EISK8-100T/FC Skorpion Switch is an 8-port unmanaged Ethernet switch combining 6 RJ-45 copper ports (10/100 Mbps) with 2 fibre uplink ports (100 Mbps) with two SC-connector multimode fibre uplinks for mid-distance runs of up to 2 km each. The fibre ports are preset for full-duplex operation, while the copper ports auto-negotiate speed and duplex. A half-wave rectified low-voltage power supply accepts 10-36 VDC or 24 VAC, allowing the switch to share a common 24VAC control bus with actuators, sensors, and other field devices. A writable side label lets the installer document each cable run right on the unit.
Dual Multimode SC Fibre Uplinks
- ›Two 100BASE-FX ports, 100 Mbps full-duplex (preset)
- ›Multimode fibre, 50/125 or 62.5/125 µm
- ›SC (Subscriber Connector, push-pull style) connectors
- ›Maximum segment length: up to 2 km (6,562 ft) per port
- ›Two fibre ports enable daisy-chain or ring topologies
- ›Dedicated LED per fibre port for link status and activity
6 Copper Ports, Plug-and-Play
- ›6 × 10/100 Mbps shielded RJ-45 ports
- ›Auto-negotiation of speed (10/100) and duplex (half/full)
- ›Auto-MDIX accepts straight-through or crossover cables
- ›Store-and-forward switching, non-blocking wire-speed
- ›ANSI/IEEE 802.3 compliant
Flexible Power & Bus Sharing
- ›Wide-range input: 10-36 VDC or 24 VAC ±10%
- ›Half-wave rectified PSU shares 24VAC control bus
- ›Power draw: 4 W DC or 8 VA AC
- ›Redundant power: DC + DC, AC + DC, or DC + AC backup
- ›Reverse-polarity protection on inputs
- ›Removable 4-pin power connector for fast servicing
Diagnostic LEDs & Build
- ›Power LED (green) for supply status
- ›Per copper port Speed LED (top): green=100 Mbps, unlit=10 Mbps
- ›Per copper port Link/Activity LED (bottom): solid green=link, flashing=data
- ›Fibre port LED: solid green=link, flashing=data
- ›Rugged metal enclosure with metal DIN-rail clip
- ›Writable side label for cable documentation
| Specifications | |
|---|---|
| Total Ports | 8 (6 copper + 2 fibre) |
| Copper Ports | 6 × 10BASE-T/100BASE-TX, shielded RJ-45, Auto-MDIX |
| Copper Data Rate | 10/100 Mbps, auto-negotiated, half or full duplex |
| Fibre Ports | 2 × 100BASE-FX, SC connectors |
| Fibre Mode | Multimode (50/125 or 62.5/125 µm) |
| Fibre Data Rate | 100 Mbps, full-duplex only (preset) |
| Maximum Fibre Distance | up to 2 km (6,562 ft) per port |
| Switching Mode | Store-and-forward, non-blocking (full wire-speed) |
| MAC Address Aging | 300 seconds inactivity timeout |
| IEEE Standard | ANSI/IEEE 802.3 |
| Power Input | 10-36 VDC (4 W) or 24 VAC ±10%, 47-63 Hz (8 VA) |
| Power Supply Type | Half-wave rectified, allows sharing of 24VAC/VDC control bus |
| Power Redundancy | Backup input supports DC or AC; reverse-polarity protected |
| Power Connector | 4-pin removable terminal block (COM / HI / HIB / chassis) |
| Operating Temperature | 0°C to +60°C (+32°F to +140°F) |
| Storage Temperature | -40°C to +85°C |
| Humidity | 10-95%, non-condensing |
| Protection Rating | IP30 |
| Mounting | TS-35 DIN-rail |
| Dimensions (W × D × H) | 41 × 96 × 131 mm (1.61 × 3.79 × 5.15 in) |
| Shipping Weight | 1 lb (0.45 kg) |
| Enclosure | Rugged metal, with integrated metal DIN-rail clip |
| Wire Size (Power) | 16-22 AWG solid, 16-18 AWG stranded |
| Regulatory | UL 508 Listed (Industrial Control Equipment), c-UL Listed, CE Mark, FCC Part 15 Class A, RoHS, EN55032, EN55035 |
| UL 508A Compatibility | Directly acceptable as UL 508 Listed Industrial Control Equipment in UL 508A panels |
| Warranty | 5-year limited (Contemporary Controls) |
Frequently Asked Questions
Which FC model do I need: FC, FT, or FCS?
If you have existing ST (bayonet) fibre infrastructure, see the EISK8-100T/FT (multimode ST). For long-distance single-mode runs up to 15 km, see the EISK8-100T/FCS (single-mode SC). All three variants share the same hardware (6 copper ports, 41 mm wide, UL 508 listed, half-wave rectified PSU) and differ only in the fibre ports: connector type and mode. Match your existing fibre patch panels, media converters, or peer switches to avoid an incompatible link.
What can I do with the two fibre ports?
The dual fibre ports unlock several common architectures. Daisy-chain: connect cabinet A to cabinet B to cabinet C in series, using one fibre port as "in" and one as "out" at intermediate cabinets. Ring topology: connect a series of switches in a closed loop for traffic flow flexibility (note: this is a passive ring, not a managed RSTP/MRP ring — without a managed switch in the loop, you must avoid creating a true Layer-2 loop). Dual upstream: connect both fibre ports to two different upstream switches or media converters for path diversity (again, only one path active at a time to avoid loops). Bridging: span two physically separated copper segments through a single cabinet.
Why are the fibre ports full-duplex only?
The 100BASE-FX standard defines fibre links as full-duplex by default in industrial and commercial deployments. The EISK8-100T/FC's two fibre ports are preset for 100 Mbps full-duplex operation to deliver maximum performance and reliability without auto-negotiation overhead. Make sure the device on the other end of each fibre link is also configured for 100 Mbps full-duplex to prevent duplex mismatch errors.
Can the EISK8-100T/FC be installed in a UL 508A control panel?
Yes. The EISK8-100T/FC is UL 508 Listed and c-UL Listed for Industrial Control Equipment. UL 508-listed components are directly acceptable for use in UL 508A panels without invalidating the panel listing, as long as the device is supplied from a Class 2 limited-energy source per the panel's circuit requirements.
Can I power the switch from my existing 24VAC control bus?
Yes. The EISK8-100T/FC uses a half-wave rectified low-voltage power supply, which means it can share a common 24VAC source with other control devices such as actuators, valves, sensors, and thermostats. Power draw is 4 W on DC or 8 VA on AC — somewhat higher than copper-only Skorpion models due to the two fibre transceivers, so size your transformer accordingly.
What do the per-port LEDs indicate?
Each copper port has two LEDs. The top "Speed" LED glows solid green when the link is operating at 100 Mbps and is unlit when the link is at 10 Mbps. The bottom "Link/Activity" LED glows solid green when a link is established and flashes when data is being transmitted or received. To distinguish "no link" from "10 Mbps link", check the Link/Activity LED — if it's also off, there's no link; if it's solid green, the link is up at 10 Mbps. Each fibre port has one LED that glows solid green when linked to a working 100BASE-FX peer and flashes during data transmission. A separate green Power LED confirms supply status.
Is the EISK8-100T/FC suitable for outdoor installations?
No. The EISK8-100T/FC has an indoor operating range of 0°C to +60°C and IP30 protection, and is not rated for outdoor or extreme-temperature applications. Outdoor or wide-temperature deployments require a weather-rated enclosure or a switch rated for the conditions.
- Sub-Category:
- Unmanaged Switches
