I/O Expanders

I/O expandersare a type of computer hardware that allows more than one device to connect to a single port on a computer.

How do I/O expanders work?

The expander connects to a single spot, but has multiple connections for other devices. Such expanders offer the advantage of allowing more devices of a particular port type to be used at the same time. This commonly used with USBs and ethernet ports.

Types of I/O expanders

There are two main types of I/O expanders: internal and external.

Internal expanders

These have a connection inside the computer, typically on the motherboard, and the only part the user can see is the expansion plate which houses the ports to which they can connect more devices.

External expanders

An external expander plugs into an existing port introducing multiple new places to connect. When not part of a computer system, these devices are commonly known as splitters.

222 Products showing for I/O Expanders

In Stock
  • RS Stock No. 517-0249
  • Mfr. Part No. PCF8574AN
Subtotal (1 unit)
£4.93(exc. VAT)
£4.93/unit
In Stock
  • RS Stock No. 403-636
  • Mfr. Part No. MCP23S08-E/P
Subtotal (1 pack of 5 units)
£5.85(exc. VAT)
£1.17/unit
In Stock
  • RS Stock No. 403-563
  • Mfr. Part No. MCP23008-E/P
Subtotal (1 pack of 5 units)
£5.75(exc. VAT)
£1.15/unit
In Stock
  • RS Stock No. 403-806
  • Mfr. Part No. MCP23017-E/SP
Subtotal (1 pack of 5 units)
£6.15(exc. VAT)
£1.23/unit
Last RS stock
  • RS Stock No. 510-780
  • Mfr. Part No. PCF8574T/3,512
Subtotal (1 pack of 5 units)
£5.35(exc. VAT)
£1.07/unit
Last RS stock
  • RS Stock No. 190-6955P
  • Mfr. Part No. MAX7311AAG+
Subtotal 2 units (supplied in a tube)
£18.92(exc. VAT)
£9.46/unit
In Stock
  • RS Stock No. 403-642
  • Mfr. Part No. MCP23008-E/SO
Subtotal (1 pack of 5 units)
£4.32(exc. VAT)
£0.864/unit
In Stock
  • RS Stock No. 912-6833
  • Mfr. Part No. MCP23S17-E/SP
Subtotal (1 tube of 15 units)
£19.50(exc. VAT)
£1.30/unit
In Stock
  • RS Stock No. 219-4626
  • Mfr. Part No. PCA9615DPJ
Subtotal (1 pack of 5 units)
£21.85(exc. VAT)
£4.37/unit
Last RS stock
  • RS Stock No. 219-4645
  • Mfr. Part No. PCF8574AT/3,518
Subtotal (1 pack of 10 units)
£13.23(exc. VAT)
£1.323/unit
In Stock
  • RS Stock No. 681-1143
  • Mfr. Part No. MCP23016-I/SP
Subtotal (1 pack of 2 units)
£3.36(exc. VAT)
£1.68/unit
In Stock
  • RS Stock No. 197-7469
  • Mfr. Part No. PCF8574N
Subtotal (1 pack of 5 units)
£16.25(exc. VAT)
£3.25/unit
In Stock
  • RS Stock No. 403-812
  • Mfr. Part No. MCP23S08-E/SO
Subtotal (1 pack of 5 units)
£5.60(exc. VAT)
£1.12/unit
In Stock
  • RS Stock No. 177-3255
  • Mfr. Part No. MCP23017T-E/SO
Subtotal (1 pack of 10 units)
£11.80(exc. VAT)
£1.18/unit
In Stock
  • RS Stock No. 216-275
  • Mfr. Part No. PI4IOE5V9554ALEX
Subtotal (1 unit)
£0.86(exc. VAT)
£0.86/unit
In Stock
  • RS Stock No. 687-8770
  • Mfr. Part No. MCP23S08-E/SS
Subtotal (1 unit)
£1.20(exc. VAT)
£1.20/unit
In Stock
  • RS Stock No. 681-1128
  • Mfr. Part No. MCP23017-E/SS
Subtotal (1 pack of 2 units)
£2.58(exc. VAT)
£1.29/unit
In Stock
  • RS Stock No. 219-4624P
  • Mfr. Part No. PCA9555PW,118
Subtotal 5 units (supplied on a continuous strip)
£7.88(exc. VAT)
£1.576/unit
In Stock
  • RS Stock No. 889-5109
  • Mfr. Part No. MCP23017-E/SO
Subtotal (1 tube of 27 units)
£26.622(exc. VAT)
£0.986/unit
In Stock
Subtotal 1 unit (supplied in a tube)
£14.61(exc. VAT)
£14.61/unit
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