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

Chapter 3

Functional Details

External components

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

ƒUSB connector

ƒLED

ƒScrew 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