Measurement-computing WLS-TC Manuel d'utilisateur télécharger pdf (Page 16)

WLS-TC User's Guide Functional Details

To reduce the error, reduce the length of the thermocouple to lower its resistance, or lower the AWG of the wire

by using a wire with a larger diameter. With OTD disabled, a maximum of 30 nA of input leakage current is

injected into the thermocouple.

AC power supply

The external power supply is an AC-to-USB 2.5 W supply that is used to power the WLS-TC during remote

wireless operations (MCC p/n USB Power Adapter.)

External components

The WLS-TC has the following external components, as shown in Figure 5.

 Screw terminals

 USB connector

 Status LEDs (Command, Wireless Power, Transmit, Receive, Received Signal Strength indicators)

 LED Test button

Screw terminal pins 1 to 26

Receive LED

Screw terminal pins 27 to 52

Transmit LED

Command LED

Wireless Power LED

LED Test button

USB connector

Received Signal Strength (RSS) LEDs

Figure 5. WLS-TC component locations

Screw terminals

The device's four banks of screw terminals are for connecting thermocouples and digital I/O lines. These

terminals also provide ground and power output connections. Refer to the "Screw terminal pin out " section on

page 12 for screw terminal descriptions.

Caution! The two +5V terminals (pin 21 and pin 47) are isolated (500 VDC) from the USB +5V. Each +5V

terminal is an output. Do not connect to an external power supply or you may damage the WLS-

TC and possibly the computer.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 25 26

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Measurement-computing WLS-TC Manuel d'utilisateur Page 16