Measurement Computing USB-PDISO8/40 - Manual (Page 18)

USB-PDISO8/40 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 > V
ext
or V
ext
> 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-PDISO8/40 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 allows multiple 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.
Mechanical
Table 6. Mechanical specifications
304.3 mm (L) x 121.9 mm (W) x 17.8 mm (H) Card dimensions
12.0" (L) x 4.8" (W) x 0.7" (H)
342.9 mm (L) x 125.7 mm (W) x 58.9 mm (H) Enclosure dimensions
13.5" (L) x 4.95" (W) x 2.32" (H)
4-2