HID Global Corporation SMARTID User Manual
Page 8 of 19
February 13, 2008
© 2008 HID Global Corporation. All rights reserved.
SmartID Proximity Reader - 8030-901, Rev A.0
3.1.4 Reader Output Interface and Pull-up Resistors
The SmartID readers provide true open collector outputs for Wiegand, Clock-and-
Data, ABA track 2 emulation, meaning the data output is not voltage driven.
Data, ABA track 2 emulation, meaning the data output is not voltage driven.
External pull-up resistors are required when the controller does not provide internal
pull-up resistors. The typical value for the pull-up resistors is 1kOhm. The
recommended position to place the pull-up resistors is at the controller side.
pull-up resistors. The typical value for the pull-up resistors is 1kOhm. The
recommended position to place the pull-up resistors is at the controller side.
The pull-up resistor #1 connects form Data/D1 (reader connector pin 3) to a 5 volt
reference.
reference.
The pull-up resistor #2 connects form Clock/D0 (reader connector pin 4) to a 5 volt
reference.
reference.
February 13, 2008
© 2008 HID Global Corporation. All rights rese
SmartID Proximity Reader - 8030-901, Rev A.0
5.3 Tamper Switch - Optional
Figure 2 Tamper Switch