Measurement Specialties PMD-1024HLS manual Counter section, Power

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PMD-1024HLS User's GuideSpecifications

Counter section

 

Table 4-2. Counter specifications

 

 

Pin name (Note 4)

CTR

Counter type

Event counter

Number of channels

1

Input source

CTR screw terminal

Resolution

32 bits

Schmidt trigger hysteresis

20 mV to 100 mV

Input leakage current

±1 µA

Maximum input frequency

1 MHz

High pulse width

500 ns min

Low pulse width

500 ns min

Input low voltage

0 V min, 1.0 V max

Input high voltage

4.0 V min, 15.0 V max

Note 4: CTR is a Schmitt trigger input

Power

Table 4-3. Power specifications

Parameter

Conditions

Specification

 

 

 

Supply current (Note 5)

No Load

60 mA

Input power requirements

 

 

4.75 V min, 5.25 V max

(Note 6)

 

 

 

USB +5 V power available

Measured at “USB +5 V” screw terminals

4.4 V min, 5.25 V max

 

(pins 10,14 and 30)

 

USB +5 V power output

Connected to:

[350 mA] – [total output source

current (Note 7)

ƒ

Self-powered hub

current]

 

ƒ

Externally-powered root port hub

 

 

Connected to

[60 mA] – [total output source

 

ƒ

Bus-powered hub

current]

 

ƒ

Battery-powered root port hub.

 

USB +5 V overcurrent

Resettable fuse

Hold current: 350 mA, typical

protection

 

 

 

 

 

Trip current: 700 mA typical

 

 

 

 

 

 

 

 

 

 

Trip/recovery time: 100 mS, max

 

 

 

 

 

 

 

On resistance: 1.3 Ohms max

 

 

 

 

Note 5: This is the total (no load) current requirement for the PMD-1024HLS.

Note 6: Bus-powered hubs are allowed to provide downstream USB power as low as 4.4 V. Although your PMD-1024HLS will typically function at this 4.4 V minimum, guaranteed performance requires a minimum power supply voltage of 4.75 V. All self-powered and root port hubs will meet this 4.75 V minimum.

Note 7: See available source/sink current level in the "Digital input/output" section.

4-2

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Contents Page PMD-1024HLS Management committed to your satisfaction Trademark and Copyright Information Table of Contents Where to find more information About this Users GuideWhat you will learn from this users guide Conventions in this users guideIntroducing the PMD-1024HLS ChapterPMD-1024HLS block diagram Software featuresConnecting a PMD-1024HLS to your computer is easy Installing the PMD-1024HLS What comes with your PMD-1024HLS shipment?Hardware SoftwareInstalling the software Installing the hardware Be sure you are using the latest system softwareUnpacking the PMD-1024HLS DocumentationIf the LED turns off External components USB connectorFunctional Details Screw terminal pins Screw terminal wiringMain connector and pin out False Output sink current limits Power terminalsFor more information on digital signal connections Pull-up/pull-down terminals Ground terminalsCounter terminal Pull-down connection for Port a Specifications Digital input/outputPower Counter sectionMain connector and pin out GeneralEnvironmental MechanicalDeclaration of Conformity USAMailinfo@mccdaq.com