Solid State SP2T Switch

USB

USB-1SP2T-34

www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com

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CONNECTING MULTIPLE MODULES (DAISY CHAIN)

The USB-1SP2T-34 model is designed to connect up to 25 modules in series (daisy chain) using dynamic addressing, meaning

there is no need to specifically set the address of the modules. The addresses will be set automatically as part of establishing the

communications with the computer. The module connected to the computer’s USB port will be assigned address 0 (master), the first

module connected to it will get address 1 (slave) and subsequent modules incrementing up to address 24 (slave).

Connections between modules will be made using the serial in/out ports with the module connected to the PC act as a master and all

other as slave modules. All control will be through the master module (address 0) which is the only one communicating with the PC.

Serial control out port of each module should be connected to the serial control in port of the next module.

Power will be supplied from the PC via the master module up to a maximum of 500 mA. Generally, additional power supply will

be needed to keep total current below 500 mA. All power supplies should be connected to the module via the module’s USB port.

Connecting an additional power supply will automatically cut off power draw from the serial control in port for that module.

The serial master/slave bus allows connecting modules of different types to the same daisy chain as long as all support Mini-Circuits

Dynamic addressing setup. To add a new module to the setup, simply connect the module and refresh the address listing, no need

to reset any of the existing modules or assign addresses manually.

Note: Different module types may have different current consumption which will change the number of units which can be connected

before an additional power supply is needed.

USB control

(limited to 500 mA max)

RF Connectors

Module 0

USB

Serial Ctrl In

Serial Ctrl Out

Master

(Additional power supply will

need to be connected to keep

total current below 500 mA.)

RF Connectors

Module 24

USB

Serial Ctrl In

Serial Ctrl Out

Slave 24

RF Connectors

Module 2

USB

Serial Ctrl In

Serial Ctrl Out

Slave 2

RF Connectors

Module 1

USB

Serial Ctrl In

Serial Ctrl Out

Slave 1

Power adaptor