Vanderbilt lite blue - Connecting to Lite Blue; Powering SBB-RI

VLBIM06/15/15 v4.1.0
Chapter 4 SBB-RI (Legacy) 63
Connecting to lite blue
Data communication between the lite blue controller and a VBB-RI reader interface is via RS-485 protocol. Either
RS-485 channel on the lite blue controller can be used to communicate with P4 on a VBB-RI. The below
example is using RS485-1 on the lite blue controller and P4 on the VBB-RI.
Data Communication between lite blue and SBB-RI
lite blue
SBB-RI
Power Supply
RS-485-1 TR+
Pin 2 - RXDA (Data A)
RS-485-1 TR-
Pin 3 - TXDB (Data B)
Pin 1 - PWR (Power)
+ (Power)
Pin 4 - GND (Ground)
- (Ground)
Powering SBB-RI
The SBB-RI should receive power directly from a UL 294 Listed Power Limited power supply. Power will be
supplied independently from the lite blue controller.