The extender does not distinguish between receiving and sending, The wiring is correct,Both sides need power supply, 9-24v,Adaptive wg26-wg80 format, Signal delay in 50-150ms Model Number:WG-RS485 Instructions:Please pay attention to the following points when using the extender:1. The card reader must be connected to the transmitter, that is, the GND of both should be connected; 2. The access control board must be connected to the receiving converter, that is, the GND of both should be connected; 3. 5/6 type network cable can be used as the signal transmission line; the reader can be powered separately from the access control board 100 meters or more; 4. If the access control board is powered, it is best to supply the remaining pairs of cable in parallel, leaving only one pair of lines for transmitting 485 signals: 5. If you can't receive the signal, please open the converter cover and observe the change of the indicator light: working status: red light is on the sending end: the blue light is on; the receiving end: receiving the signal green light is on; 6. Converter 485 terminal GND can not be connected under normal circumstances, only connect AB two lines, such as using shielded transmission line can be connected to the shielding layer; 7. The extender needs to be used in pairs to function properly. The user should decode the card number when using it alone. Colour:As Shown Material:plastic Package Contents: 1Set x Wiegand Extender(Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.