Measurement Computing WLS-TEMP - Manual (Page 21)

WLS-TEMP Specifications
21
1 Screw terminal pins 1 to 26 6 Receive LED
2 Screw terminal pins 27 to 52 7 Transmit LED
3 Command LED 8 Wireless Power LED
4 LED Test button 9 USB connector
5 Received Signal Strength (RSS) LEDs
Figure 11. WLS-TEMP component locations
Screw terminals
The device's four banks of screw terminals are for connecting temperature sensors and digital I/O lines. These
terminals also provide ground and power output connections. Refer to "
Screw terminal pinout " 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-
TEMP and possibly the computer.
USB connector
The USB connector provides +5V power and communication. External power is required to operate the WLS-
TEMP remotely through the wireless interface.
For local operation, connect to the USB port or hub on your computer. For remote wireless operation, connect
to the external AC adapter shipped with the device.
Status LEDs
The LEDs indicate the communication status of USB and wireless operations. In addition, three LEDs indicate
the signal strength of data received over the wireless link. Refer to the table below for the function of each LED.
LED functions
LED Function
Command Steady green – the WLS-TEMP is connected to a computer or AC adapter
Blinking green – the WLS-TEMP is receiving a command over the USB or wireless link.
Wireless Power (green) The WLS-TEMP internal RF device is receiving power (USB or AC adapter).
Transmit (yellow) Data is being transmitted over an active wireless link.
Receive (red) Data is being received over an active wireless link.