The Contemporary Controls EIBA5-100T BAS Switch is a 5-port unmanaged Ethernet switch built specifically for Building Automation Systems. 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. The unit comes in a shallow-depth, low-profile metal enclosure with panel-mount housing with corner mounting flanges, designed to fit comfortably in BAS control cabinets where rear depth is limited. 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, valves, sensors, and thermostats. A writable label and matching cable tags help organize the field-device wiring at install time.
Built for Building Automation
- ›5 × 10/100 Mbps shielded RJ-45 ports
- ›Shallow-depth, low-profile metal enclosure
- ›Panel mount with corner-flange screw holes
- ›Writable side label plus matching cable tags
- ›UL 508 Listed for Industrial Control Equipment
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
24VAC Bus-Compatible Power
- ›Wide-range input: 10-36 VDC or 24 VAC ±10%
- ›Half-wave rectified PSU shares 24VAC control bus
- ›Power draw: 3 W DC or 6 VA AC
- ›Quick-disconnect 3-pin terminal strip (HI / COM / chassis)
- ›Reverse-polarity protection on input
Diagnostic LEDs
- ›Power LED (green) for supply status
- ›Per-port Activity/Link LED:
- › Solid green = 100 Mbps link
- › Solid yellow = 10 Mbps link
- › Flashing = data transmission
| Specifications | |
|---|---|
| Ports | 5 × 10BASE-T/100BASE-TX, shielded RJ-45, Auto-MDIX |
| Data Rate | 10/100 Mbps, auto-negotiated, half or full duplex |
| Switching Mode | Store-and-forward, non-blocking (full wire-speed) |
| IEEE Standard | ANSI/IEEE 802.3 |
| Power Input | 10-36 VDC (3 W) or 24 VAC ±10%, 47-63 Hz (6 VA) |
| Power Supply Type | Half-wave rectified, allows sharing of 24VAC/VDC control bus |
| Power Connector | 3-pin quick-disconnect terminal strip (HI / COM / chassis); single primary input, no redundant backup |
| 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 | Panel mount with corner-flange screw holes |
| Dimensions | 105 × 89 × 32 mm (4.13 × 3.5 × 1.25 in) |
| Shipping Weight | 1 lb (0.45 kg) |
| Enclosure | Rugged metal |
| Wire Size (Power) | 16-20 AWG solid, 16-18 AWG stranded |
| Regulatory | UL 508 Listed (Industrial Control Equipment), c-UL Listed, CE Mark, FCC Part 15 Class A, RoHS |
| 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
EIBA5-100T or EIBA5-100T/R: which mount do I need?
Both SKUs are the same switch with different mounting hardware. Choose EIBA5-100T if you need to screw the unit directly to a panel through corner mounting flanges (the panel-mount version). Choose EIBA5-100T/R for the DIN-rail mount style. Electrical specs, port count, LED scheme, and UL listing are identical between the two.
Can the EIBA5-100T be installed in a UL 508A control panel?
Yes. The EIBA5-100T 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 — this is the marquee feature of the EIBA series for BAS applications. The half-wave rectified low-voltage power supply allows the switch to share a common 24VAC source with actuators, valves, sensors, thermostats, and other field devices. With only 6 VA of AC draw, it adds minimal load to the existing Class 2 transformer feeding the field-device bus. Contemporary Controls also offers wall-mount plug-in transformers (AI-XFMR for 120 VAC and AI-XFMR-E for 230 VAC) for installations that need a dedicated power source.
Does the EIBA5-100T support redundant power input?
No. Unlike the Skorpion EISK series, the EIBA5-100T uses a 3-pin power connector with a single primary input (HI / COM / chassis) and does not provide a backup terminal. For installations that require redundant power (primary + backup) or a fault relay output for power-loss alarming, see the Skorpion EISK5-100T (DIN-rail mount with redundant input) or the wide-temp EISW5-100T (with fault relay).
Does the switch require any configuration?
No. The EIBA5-100T 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?
Each port has a single Activity/Link LED that combines speed, link state, and traffic into one indicator using colour and flashing. Solid green = 100 Mbps link established. Solid yellow = 10 Mbps link established. Flashing (green or yellow) = data transmission on that port. Off = no link. A separate green Power LED confirms supply status.
Is the EIBA5-100T suitable for outdoor installations?
No. The EIBA5-100T 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 (see the EISW5-100T for a wide-temp -40 to +75°C alternative).
How is the EIBA series different from the Skorpion EISK5-100T?
Both are 5-port 10/100 indoor unmanaged switches with UL 508 ICE listing and 24VAC bus-sharing capability. The EIBA series is positioned as the cost-effective BAS-focused option with a shallow-depth low-profile form factor (panel or DIN-rail mount), single Activity/Link LED per port, and a single primary power input. The Skorpion EISK5-100T is the more feature-rich industrial option with a tall narrow form factor (26 mm wide DIN-rail only), dual L+D LEDs per port for separate link/rate and duplex status, and a 4-pin connector with redundant power backup capability.
- Sub-Category:
- Unmanaged Switches
