
EIR208 Series Quick Start
Guide
Package Contents
• EIR208 Series Industrial, Unmanaged, Ethernet Switch
• Quick Start Guide (One per shipment)
• Power Terminal Block (installed)
• Fiber Optic Dust Covers (installed on fiber optic models)
If any item is missing or damaged, contact B&B Electronics
for a replacement
Front Panel
EIR208 (3 Fiber, 4 RJ45) EIR208 (8 RJ45)
1 Power Terminal Block 2 Position, Removable
2 PWR LED ON When Power Applied
3 Fiber Optic SPD LED Normally OFF (100BaseFx)
3 Fiber Optic LINK LED ON when Fiber Port Linked
4 RJ45 LINK LED ON when RJ45 Port Linked
Flashes When Data Transmitted
4 RJ45 SPD LED ON if 100 mbps
5 RJ45 Ports Number depends on model
6 Fiber Ports Number and type depends on Model
DIN Rail Mounting
B&B ELECTRONICS QUICK START GUIDE
p/n 8451R001 EIR208 3409qsg-1/2
© 2009 by B&B Electronics. All rights reserved.
1. Slide and hold the DIN clip toward the bottom of the
switch. Angle the top portion of the DIN mount over the
top of DIN Rail.
2. Move the switch so that it is parallel with the DIN Rail.
3. Let go of the DIN Clip. The spring should return it to its
original position.
Attach Power Leads
External Supply Required
Power input: 10 to 48 VDC, 5.8W maximum, Class 2
Surrounding Air Ambient Temperature: 0 to 55° C
1. Loosen the screw to open the terminal block lead clamp.
2. Insert the power lead. TB will accept 16-28 AWG wire.
3. Tighten the screw to close the terminal block lead clamp.
Ensure the clamp holds the lead securely. However, do not
over tighten.
NOTE: For Replacement Terminal Block Order Part #7444.
International Headquarters: 815-433-5100 www.bb-elec.com
European Headquarters: +
353 91 792444
www.bb-europe.com

Female RJ45
Attach RJ45 Cable
1. Auto MDI/MDI-x is
supported. A straight
through or cross-over
cable may be used.
2. 10/100BaseT auto
negotiation and full/halfduplex are supported.
MDI Cable Pinout
Pin Signal
1 Tx+
2 Tx3 Rx+
6 Rx-
MDI-X Cable Pinout
Pin Signal
1 Rx+
2 Rx3 Tx+
6 Tx-
Attach Fiber Optic Cable
if equipped)
p/n 8451R001 EIR208 3409qsg-2/2
© 2009 by B&B Electronics. All rights reserved.
Mode and Distance Type Wavelength
Multi-mode (2 km) 62.5/125 µm 1310 nm
Single-mode (15 km) 9/125 µm 1310 nm
Single-mode (40 km) 9/125 µm 1310 nm
Single-mode (80 km) 9/125 µm 1550 nm
Output Power RCVR Sensitivity
Multi-mode (2 km) -19 to -14 dBm ≤ -32 dBm
Single-mode (15 km) -15 to -8 dBm ≤ -32 dBm
Single-mode (40 km) -5 to 0 dBm ≤ -34 dBm
Single-mode (80 km) -5 to 0 dBm ≤ -34 dBm
Fiber Optic Cable Information
Installation Complete
1. When the network cables are attached and power
is applied, installation is complete.
2. The switch will automatically discover network
devices, populate its MAC address table, and
pass traffic to the appropriate ports.
Mechanical Diagram
1. Ensure your fiber optic cable is terminated with
the correct connector type. EIR208 switches use
SC or ST connectors.
2. Fiber optic type for each port is located on the
product’s side label. When connecting the cable
B&B ELECTRONICS QUICK START GUIDE
to the switch, be sure to line up the slider guide
on the cable and switch connectors.
3. Connect the fiber optic transmitter to the
downstream device’s receiver and vice-versa.
International Headquarters: 815-433-5100 www.bb-elec.com
European Headquarters: +
353 91 792444
www.bb-europe.com