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3-5
Cisco Physical Access Gateway User Guide
OL-20932-02
Chapter 3 Connecting a Cisco Reader Module
Physical Overview and Port Description
6 Input interfaces
Three input interfaces used to sense the contact closure. Each input can be configured as
supervised or unsupervised and can be configured to sense a Normally Open (NO) or
Normally Closed (NC) contact.
• An unsupervised input senses a simple contact closure state, including Normal or
Alarm. When connected to open contacts, the terminal voltage range is 4V to 5V. For
closed contacts, the voltage range is 0V to 0.7V.
• A supervised input senses four contact states, including Normal, Alarm, Open and
Short. These inputs require 1K End-Of-Line (EOL) termination resistors installed at the
contacts (two resistors are included in the accessory kits for each Input port).
7 Output interfaces
Three Form C (5A @ 30V) relay output interfaces. Each output can be configured as either
Normally Closed (NC) or Normally Open (NO).
• C & NO connection: The relay is normally open. The circuit is closed when triggered.
• C & NC connection: The relay is normally closed. The circuit is opened when triggered.
Notes:
• Install surge protection between the output device and the Cisco PAM module, as
described in the “Installing Surge Suppressors on Output Device Connections” section
on page 1-13.
• Common (C) is always used, and either NC or NO is used to complete the connection.
• All Generic Output devices installed in Cisco PAM systems prior to release 1.1.0, were
connected to the Gateway, Reader, or Output modules with the wiring reversed. If
upgrading to Cisco PAM release 1.1.0 from an earlier release, disconnect all Generic
Output devices and do the following:
–
Connect Normally Open devices to the N.O. and C connectors on the Gateway,
Reader, or Output module.
–
Connect Normally Closed devices to the N.C. and C connectors on the Gateway,
Reader, or Output module.
8 PF
Power fail input: an unsupervised input that raises a “power fail” alarm when the circuit is
open. Can be configured as an additional unsupervised port. An unsupervised input
indicates only normal or alarm. The corresponding LED is red when circuit is open (when
no input is connected).
9 TM
Tamper input: an unsupervised input that raises a “tamper” alarm when the circuit is open.
Can be configured as an additional unsupervised port. An unsupervised input indicates only
normal or alarm. The corresponding LED is red when circuit is open (when no input is
connected).