Measurement Specialties PMD-1024HLS manual Functional Details, External components, USB connector

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Chapter 3

Functional Details

External components

The PMD-1024HLS has the following external components, as shown in Figure 3-1.

USB connector

LED

Screw terminal banks (2)

	Screw terminal
LED	pins 1 to 20

Screw terminal

pins 21 to 40USB connector/cable

Figure 3-1. PMD-1024HLS external components

USB connector

The USB connector is on the right side of the PMD-1024HLS housing. This connector provides +5 V power and communication. The voltage output is system-dependent, and may be less than +5 V. No external power supply is required.

LED

The LED on the front of the housing indicates the communication status of the PMD-1024HLS. It uses up to 5 mA of current and cannot be disabled. Table 3-1explains the function of the PMD-1024HLS LED.

	Table 3-1 LED illumination

LED Illumination	Indication

Steady green	The PMD-1024HLS is connected to a computer or external USB hub.
Blinks continuously	Data is being transferred.
Blinks three times	Initial communication is established between the PMD-1024HLS and the computer.

3-1

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Contents Page PMD-1024HLS Management committed to your satisfaction Trademark and Copyright Information Table of Contents About this Users Guide Where to find more informationWhat you will learn from this users guide Conventions in this users guideChapter Introducing the PMD-1024HLSSoftware features PMD-1024HLS block diagramConnecting a PMD-1024HLS to your computer is easy What comes with your PMD-1024HLS shipment? Installing the PMD-1024HLSHardware SoftwareBe sure you are using the latest system software Installing the software Installing the hardwareUnpacking the PMD-1024HLS DocumentationIf the LED turns off Functional Details USB connectorExternal components Main connector and pin out Screw terminal wiringScrew terminal pins False For more information on digital signal connections Power terminalsOutput sink current limits Counter terminal Ground terminalsPull-up/pull-down terminals Pull-down connection for Port a Digital input/output SpecificationsCounter section PowerGeneral Main connector and pin outEnvironmental MechanicalUSA Declaration of ConformityMailinfo@mccdaq.com