Connecting the power and data cable

The LI-560 features a 12-pin socket connector as shown in Figure 3‑1.

Important: Do not twist the cable during installation or removal. Doing so will damage the connector pins. To remove the cable, grasp the collar and pull it away from the anemometer.

Pre-made cables with connectors may be purchased from LI-COR in 1.25 and 10 meter lengths. Customized cables up to 25 meters in length can be made with the 571D-C custom cable kit. Because this detachable cord carries both data and power, replacement cords or user-built cords must comply with the wiring and insulation specifications set out in the EIA Standard appropriate for the selected communication protocol.

Power and data wire assignments

Figure 3‑1 shows the socket assignments for the signal connections and positions within the connector in reference to looking at the bottom of the LI-560. The cable internal wire colors and pin description are given in Table 3‑1.

Figure 3‑1. 12-pin socket connector and assignments for the LI-560.

Caution: The Power In wire is the only one that can handle voltages exceeding five volts. Applying excess voltage to other wires can damage the LI-560. Such damage is not covered by the warranty.

Table 3‑1. LI-560 socket descriptions and wire colors.
Pin # Wire Color Signal Name Description
1 Brown VIN Voltage Input of 5V to 32V
2 Red GND Ground connection. Only one of the GND connections are required for proper operation. Multiple GND connections are provided as a convenience for system wiring.
3 Orange Trigger Synchronizing Trigger input. This input allows multiple instruments to synchronize their sampling to a common signal.
4 Yellow TX+ Serial Transmit data output in EIA232 Mode and TX+ data output in EIA422 mode.
5 Green TX- Serial Transmit data output TX- in EIA422 mode. Not used in EIA232 mode.
6 Blue RX+ Serial Receive data input in EIA232 Mode and TX+ data output in EIA422 mode.
7 Violet RX- Serial Receive data input RX- in EIA422 mode. Not used in EIA232 mode.
8 Gray URX 3.3V LVTTL UART Serial Data Input.
9 White GND Ground connection.See the description for Pin #2.
10 Black 232 Force Single Ended Serial mode. When this pin is connected to GND the TSM will start in EIA232 or LVTTL-UART mode with the settings of 115200,8,N,1 regardless of the software settings of the instrument.
11 Light Green UTX 3.3V LVTTL-UART Serial Data Output.
12 Pink GND Ground connection. See the description for Pin #2.

Connecting the LI-560 to the USB interface adapter

Note: The USB adapter is for scientific research and development use only. Do not use the USB adapter in wet locations.

The single-terminated blunt-cut cable is to connect the LI-560 to the USB adapter. Separate the yellow, blue, red, black, and brown wires from the bundle and strip 3 mm of insulation from the ends of each wire.

Open the adapter case and insert the wires into the terminal block holes as shown in Figure 3‑2. The wire colors do not correspond to the color labels, if present.

Figure 3‑2. Separate the wire leads from the cable and connect to the USB adapter.
Table 3‑2. LI-560-to-USB adapter wire colors and assignments.
Color Description
Brown Power In (+5 to 30 VDC)
Blue RS-232 TX+ (serial data out)
Yellow RS-232 RX+ (serial data in)
Red and Black Ground and Serial Return.

Note: The cable contains 12 wires to accommodate the multi-protocol capable LI-560. Therefore, these color assignments do not match the labels, if present.

A video demonstrating this connection is available at