Title: Hardware Installation Guide.pdf
Communication wiring port 1 and port 2TB2TB3TR+ TR- GNDTR+ TR- GNDPort 1 To Serial I/O DevicesPort 2 To Serial I/O Devices184 — revision 6Hardware Installation GuideImportant:Install the termination jumper ONLY on the panel at each end of the RS-485 bus. Failure to do so will compromise the proper operation of the communication channel!37.3Reader WiringEach reader port supports Wiegand, magnetic stripe, and 2-wire RS-485 electrical interfaces. Power to the reader is selectable: 12 VDC (VIN must be greater than 20 VDC), or power is passed-through (PASS) from the input voltage of the LNL-4420 (TB1-VIN), and is current-limited to 150 mA for each reader port. Readers that require different voltage or have high current requirements should be powered separately. Refer to the reader manufacture specifications for cabling requirements. In the 2-wire LED mode the Buzzer output is used to drive the second LED. Reader port configuration is set via the host software.PASS 12VREADER POWER12V