Wiegand Input; Input Points - Johnson Controls S300 Series Hardware Installation Manual

S300-DIN-RDR2SA Module

Wiegand Input

Description of Signals
complying with the Wiegand interface specification. These signals are pulled up to
5VDC by internal 3.92 K Ohm resistors when the Wiegand/RS485 switch is on. See
page 15 for information on Wiegand switch setting.
– These signals are referenced to logic ground (COM).
Reference
– Each signal has a 6 V transient voltage suppressor between it and COM.
Protection

Input Points

Description of Signals
Reader 1 Door Contact
Reader 1 REX
Reader 1 Tamper
Reader 1 Spare
Panel Power Fail
Panel Tamper
Reader 2 Door Contact
Reader 2 REX
Reader 2 Tamper
Reader 2 Spare
Calibration Resistor
The allowable voltage range for these signals is 0-12VDC.
– These signals are referenced to their associated COM input.
Reference
– Each signal is protected with series resistors and dual clamping diodes.
Protection
External Circuits – Two external resistors and switch circuit connected between an
input point and COM is required for 4-state operation. An external switch connected
between an input point and COM is required for 2-state operation. For wiring details
see "Wiring Input Devices" on page 13.
24-10239-472 Rev. A
This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2007 Johnson Controls, Inc.
– DATA0/Rs485- and DATA1/Rs485+ from each reader,
– The following are internally pulled up inputs:
Hardware Installation
9