The Contemporary Controls EISK16-100T Skorpion Switch is a 16-port unmanaged Ethernet switch built for control panel installations that need a high device-drop count without the cost of a managed switch. It delivers 10/100 Mbps non-blocking performance on every port with full plug-and-play operation, no IP address, no web interface, and no firmware setup. A half-wave rectified low-voltage power supply accepts 10-36 VDC or 24 VAC and draws only 2 W DC or 4 VA AC, allowing the switch to share a common 24VAC control bus with actuators, sensors, and other field devices. Sixteen ports fit in just 41 mm of DIN-rail width, with a writable side label for documenting each cable run on the unit.
Plug-and-Play Operation
- ›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
- ›No configuration: no IP, no firmware, no web UI
Flexible Power & Bus Sharing
- ›Wide-range input: 10-36 VDC or 24 VAC ±10%
- ›Half-wave rectified PSU shares 24VAC control bus
- ›Low draw: 2 W DC or 4 VA AC for all 16 ports
- ›Redundant primary + backup input (DC or AC)
- ›Reverse-polarity protection on inputs
High Port Density & Build
- ›16 ports in only 41 mm of DIN-rail width
- ›Rugged metal enclosure with metal DIN-rail clip
- ›Writable side label for cable documentation
- ›Shielded RJ-45 connectors on all 16 ports
- ›Removable 4-pin power connector for fast servicing
Diagnostic LEDs
- ›Power LED (green) for supply status
- ›Per-port Speed LED: green=100 Mbps, yellow=10 Mbps
- ›Per-port Link/Activity LED: solid green=link, flashing=data
- ›Two LEDs per port for at-a-glance troubleshooting
| Specifications | |
|---|---|
| Ports | 16 × 10BASE-T/100BASE-TX, shielded RJ-45, Auto-MDIX |
| Data Rate | 10/100 Mbps, auto-negotiated |
| Switching Mode | Store-and-forward, non-blocking (full wire-speed) |
| IEEE Standard | ANSI/IEEE 802.3 |
| Power Input | 10-36 VDC (2 W) or 24 VAC ±10%, 47-63 Hz (4 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 × 153 mm (1.61 × 3.79 × 6.02 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
Can the EISK16-100T be installed in a UL 508A control panel?
Yes. The EISK16-100T 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 EISK16-100T 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. With only 4 VA of AC draw, it adds minimal load to the existing class 2 transformer feeding the field-device bus.
Does the switch require any configuration?
No. The EISK16-100T is fully unmanaged and plug-and-play. It has no IP address, no web interface, and no firmware to set up. Each port auto-negotiates speed (10/100) and duplex (half/full), and Auto-MDIX accepts either straight-through or crossover cables.
What do the per-port LEDs indicate?
Every port has two LEDs. The top "Speed" LED glows green for an established 100 Mbps link or yellow for a 10 Mbps link. The bottom "Link/Activity" LED glows solid green when a link is established and flashes when data is being transmitted or received. Together they give immediate per-port visibility into negotiated speed and traffic without needing a managed switch.
How does redundant powering work on the EISK16-100T?
The 4-pin connector accepts a primary input (HI) and a backup input (HIB), both referenced to common (COM). The backup can be either DC or AC, giving flexibility for site conditions. If the primary fails, the switch keeps running on the backup. Note that this model has no fault relay output to alarm power loss — for power-loss alarming, see the EISW16-100T.
Is the EISK16-100T suitable for outdoor installations?
No. The EISK16-100T has an indoor operating range of 0°C to +60°C and is not rated for outdoor or extreme-temperature applications. For outdoor enclosures or wide-temperature requirements, see the EISW16-100T, which is rated -40°C to +75°C and includes a fault relay output for power-loss alarming.
How is this switch different from the EISW16-100T?
Both are 16-port 10/100 unmanaged switches in 41 mm of DIN-rail width. The Skorpion EISK16-100T is the cost-effective indoor option: UL 508 ICE listed, 0-60°C operating range, half-wave rectified PSU for 24VAC bus sharing, lower power draw (2 W / 4 VA), and a writable cable-ID label. The industrial EISW16-100T adds a wide -40 to +75°C operating range, UL 62368-1 ITE listing, a fault relay output for power-loss alarming, dual isolated DC inputs for redundancy, a 16K MAC address table, and Jumbo Frame support. Choose EISK16 for cost-conscious indoor BAS panels with shared 24VAC; choose EISW16 for outdoor enclosures, demanding environments, larger Layer-2 networks, or builds that need power-loss alarming.
- Sub-Category:
- Unmanaged Switches
