Measurement-computing USB-PDISO8 Instrukcja Użytkownika Pobierz pdf (Strona 20)

USB-PDISO8 User's Guide Specifications

Power

Table 3. Power specifications

Parameter Conditions Specification

USB +5 V input voltage range

4.75 V min. to

5.25 V max.

USB +5 V supply current All modes of operation 10 mA max

External power input

9 V nominal

External power supply (required) MCC p/n CB-PWR-9 9 V ±10% @ 1 A

6.5 V > Vext or Vext > 12.5 V (Note 1)

PWR LED = Off

(power fault)

Voltage supervisor limits - PWR LED.

6.5 V ≤ V

ext

< 12.5 V PWR LED = On

All relays on, 100 mA downstream hub power 820 mA typ, 900 mA max

External power consumption

All relays off, 0 A downstream hub power 200 mA typ, 230 mA max

Note 1: The USB-PDISO8 monitors the external +9 V power supply voltage with a voltage supervisory

circuit. If this power supply exceeds its specified limit, the

PWR LED will turn off, indicating a

power fault condition.

External power output

Table 4. External power output specifications

Parameter Conditions Specification

External power output - current range Note 2 4.0 A max.

External power output

Voltage drop between power input and

daisy chain power output

0.5 V max

Compatible cable(s) for daisy chain C-MAPWR-x X= 2 ,3 or 6 feet

Note 2: The daisy chain power output option allows multiple Measurement Computing USB Series

products with a USB hub output port to be powered from a single external power source in a

daisy chain fashion. The voltage drop between the module power supply input and the daisy

chain output is 0.5 V max. Users must plan for this drop to assure the last module in the chain

will receive at least 6.5 VDC.

USB specifications

Table 5. USB specifications

USB "B" connector Input

USB device type USB 2.0 (full-speed)

Device compatibility USB 1.1, USB 2.0

USB "A" connector Downstream hub output port

Supports USB 2.0 high-speed, full-speed and low-speed operating points USB hub type

Self-powered, 100 mA max downstream VBUS capability

Compatible products MCC USB Series products with a USB hub output port

USB cable type (upstream and downstream)

A-B cable, UL type AWM 2527 or equivalent. (min 24 AWG VBUS/GND,

min 28 AWG D+/D-)

USB cable length 3 meters max.

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