S321-IP Network Controller Hardware Installation
24-10239-480 Rev. F
6
Wiegand Input
Description of Signals – DATA0 and DATA1 from each reader,
complying with the Wiegand interface specification.
Reference – These signals are referenced to logic ground (COM).
Protection – Each signal has a 6 V transient voltage suppressor between
it and COM.
Input Points
Description of Signals – The following are internally pulled up inputs:
The allowable voltage range for these signals is 0-12 VDC.
Reference – These signals are referenced to their associated COM input.
Protection – Each signal is protected with series resistors and dual
clamping diodes.
External Circuits – 4-state operation requires two external resistors and
switch circuit connected between an input point and COM. 2-state
operation requires an external switch connected between an input point
and COM. For wiring details see Wiring Input Devices on page 8.
Output Points
Description of Signals – The following are open collector outputs, with
voltage range for these signals of 0-24 VDC, limited to 50mA:
IMPORTANT: These open collector outputs can be damaged by alternating
current (AC) potentials as low as 1 VAC. Connect the LED outputs only to direct
current (DC) loads up to 24VDC.
• Reader 1 Door
Contact
• Reader 1 REX
•Reader 1 Tamper
• Reader 1 Spare
• Reader 2 Door
Contact
• Reader 2 REX
•Reader 2 Tamper
• Reader 2 Spare
• Power Panel Fail
• Panel Tamper
• Reader 1 Red LED
• Reader 1 Green LED
• Reader 2 Red LED
• Reader 2 Green LED
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