CyberResearch UCERB 24 Manual de usuario descargar pdf (Pagina 19)

UCERB 08 User's Guide Functional Details

Connect the POWER OUT connector on the connected module to the POWER IN connector on the

new module.

This step is required only if you plan to daisy chain power to another module.

Connect the

USB OUT connector on the connected module to the USB IN connector on the new

module.

To add another module, repeat steps 1-2, with the module you just connected now being the

connected module.

A daisy chain example is shown in . Note that the last board in the chain is supplied with

external power.

Figure 3-5

Figure 3-5. Daisy chain connections

USB port to

USB IN

USB OUT

to USB IN

POWER OUT to

POWER

USB OUT

to USB IN

Power supply

POWER IN

Power supply

POWER IN

Power limitations using multiple UCERB 08 devices

When daisy chaining additional USB data acquisition products to the UCERB 08, you must ensure

that you provide adequate power to each board that you connect. The UCERB 08 is powered with a

9 VDC nominal, 1.0 A external power supply.

When connecting multiple modules, power supplies with higher current capability, are available

from CyberResearch.

Voltage drop

A drop in voltage occurs with each board connected in a daisy chain system. The voltage drop between

the power supply input and the daisy chain output is 0.5 V maximum. Factor in this voltage drop when

you configure a daisy chain system to ensure that at least 6.0 VDC is provided to the last board in

the chain.

Relay configuration

You can install a pull-up or pull-down resistor at the NO and NC terminals on each relay. Note that the

pull-up resistors are tied to the 5 V power and should be considered when calculating the power budget.

The relay configuration is illustrated in the following schematic.

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CyberResearch UCERB 24 Manual de usuario Pagina 19